Blaupunkt Blaubox Owner's Manual

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COMPUTER AIDED WOOFER

ENCLOSURE

AND CROSSOVER DESIGN

PURCHASE DATE:

VERSION NUMBER:

DISK SIZE

OWNER:

STREET:

CITY,ST,ZIP:

(3.5’7525”):

PR’dGRAM

BLAUPUNKT DIV. BOSCH CORPORATION

2800 SOUTH 25TH AVENUE BROADVIEW, IL 60153

l-800-323-1943

TABLE OF CONTENTS

BLAUBOX SOFTWARE AGREEMENT

INTRODUCTION TO BLAUBOX

QUICK START AND

HELPLINE

PC INSTALLATION PC requirements Installation process Starting BLAUBOX General comments on running BLAUBOX

BLAUBOXNAIN MENU Navigating the MAIN MENU of BLAUBOX Reset BLAUBOX Quit BLAUBOX and return to DOS

SCREEN 1: ENCLOSURE

PERFORXANCE

CALCULATIONS Woofer choice Box style Modify box Box math

Plot response

8 8

SCREEN 2: FINAL BOX FABRICATION Box shape

Modify dimensions

Port design

Box math

Draw box (screen or printer)

11 11 12 12 13

SCREEN 3:

SPEAEER

PARAMETER DATABASE

Scroll database

Modify database

Delete driver

Add driver

14 14 15 15

SCREEN 4: CROSSOVER DESIGN 6, 12, and 18 db/octave

lowpass

filters

6, 12, and 18 db/octave

highpass

filters

16 16

SCREEN 5: PRINTER, COLOR, USER, AND MATERIALS CONFIGURATION

Screen color

Dealer information (install)

Customer information (input)

Material thickness (box material) Printer setup

17 17 18 18 19

SCREEN 6: USING BLAUBOX Consumer guidance; how to initiate him/her to BLAUBOX

Woofer choice

Box style

Fabrication (of the final box)

20 20 21 21

SCREEN 7: TECH TALK ON WOOFER BOX DESIGN Acoustics, electronics, woofer design, and the "best box"

(Reference the help screens on BLAUBOX or the following sections

of the BLAUBOX owner's manual for a more complete discussion)

APPENDIX A: BASIC ACOUSTICS Frequency response,

wavelength, and harmonics

Loudness and the decibel

How we hear

Safe sound

In-car acoustics

23 24 25 28 29

(Table of Contents continued on page ii)

(i)

TABLE OF CONTENT.3

(Cmt

‘d)

Page

APPENDIX B: THE SOUND OF

STEREO

A little history Intensity effects in stereo Time effects in stereo

30 30 32

APPENDIX C: BASIC ELECTRONICS Voltage,

current, and phase Resistance, inductance, capacitance, and impedance Ohm's Law and power

33 34 37

APPENDIX D: BASIC RAW HOOFER DESIGN

Woofer construction and operation

Frequency response, efficiency, and dispersion

Impedance and power handling

Thiele/Small

parameters (fs, Qts, Vas)

How to measure

Thiele/Small

parameters

40 41 42 42

APPENDIX E: BASIC BOX DESIGN

Types

enclosures (sealed, vented, bandpass)

What's an "order" for an enclosure?

Pro's and Con's of various enclosures

45 48 49

APPENDIX P: FINAL BOX FABRICATION TIPS

Design choice

Materials selection

Construction, finishing, and driver mounting

Vehicle installation

APPENDIX G: BASIC CROSSOVER DESIGN Crossover networks: passive and active Capacitors and inductors

Highpass

and

lowpass

frequency response Orders of response Crossover implementation

53 53 54

5":

APPENDIX H: SYSTEM DESIGN DISCUSSIONS System design: dollars and "sense"

Speaker choices', locations, and installation tips How loud will it play? Real time analysis Final listening evaluation

56 57 58

APPENDIX I: BLAUBOX DESIGN EXANPLES Sealed box enclosure for Slimy Sam's Sentra

Single Vented

bandpass

box for Billy Bob's Bonneville

Additional comments of custom box designing APPENDIX J: AUDIO

GLO&ARY

TERNS

Every audio word you ever wanted to know (and then some...)

APPENDIX K: RECOMMENDED READING

A list of recommended reading materials for the Novice

Engineer)

INDEX

(ii)

BOFTNARE

AtREEWdT

IHPORTANT:

By opening the envelope for the floppy disks. you accept the terme

this

License Agreement.

The registration card must completed in full and returned to the address shown on the card. The pertinent information shown also be recorded in the front of the owner's

manual for

future reference as well.

GRANT OF LICENSE:

nontransferable,

In exchange for a one-time fee, Blaupunkt grants you a

package

(Product)

non-exclusive license to uee the program and/or data contained in

this

solely for your own use,

whether on one central processing unit or on

multiple machines, but

GDJ~

at the address noted on the

BLAUBOX

registration card.

may not copy,

You

reverse engineer, translate, port, modify,

store in a retrieval

transmit by any means or make derivative works of the Products without written

system,

authorization of Blaupunkt. You may not rent, disclose, publish, sell, assign, lease

sublicense,

market, or transfer the Products or use them in any manner not expreesly' authorized by this Agreement, Blaupunkt.

unless you receive prior written authorization from

If such action occurs,

your license is automatically terminated and you agree

to immediately return all copies of

the

Products in any form to Blaupunkt or destroy any

copies not returned.

you do not receive

any,

the Product.

and Blaupunkt retains all, ownership rights

The Products are copyrighted and may not be copied even if modified or

merged with other Products.

notice contained in or on the

you shall not altar or remove any copyright or proprietary

Products.

LIMITED WARRANTY AND LIABILITY:

Blaupunkt warrants that the Products in the version and level this is current on the date of initial shipment to you will, for ninety (90) days from that date,

substantially conform to Blaupunkt's specifications, when used on

Blaupunkt approved computer hardware.

nonconformities, defects or errors.

The Products are

complex.and

may contain some

Blaupunkt does not warrant that the Products will

meet your needs or expectations,

that operations of the Products will be error free or uninterrupted, or that all nonconformities can or will be corrected.

warranties whatsoever regarding the manual.

Blaupunkt makes no

Blaupunkt reserves the right to make

improvements or changes to the Products at any time without notice to Licensee.

You must notify Blaupunkt within the

go-day

warranty period of any warranty claim. Warranty claims will be recognized only if the registration card is returned to Blaupunkt within 30 days after your receipt of the product.

Blaupunkt's SOLE OBLIGATION and your

SOLE REMEDY under this Limited Warranty is for Blaupunkt, at Blaupunkt's option, to use

reasonable effort6 to repair or replace the Products or to provide an avoidance procedure

within a commercially reasonable time so that the Product substantially conforms to

Blaupunkt specifications or,

in Blaupunkt'a sole discretion, to refund the amount of

initial license fee previously paid by you for the nonconforming Product?

Blaupunkt

disclaims all responsibility for the performance of any product designed through

utilization of Products.

This Limited Warranty is void if any nonconformity has resulted from accident, abuse, misuse, misapplication, Blaupunkt.

or modification by someone other than

The Limited Warranty is non-transferable.

THE EXPRESS WARRANTY IN THIS SECTION 2 IS A LIHITED WARRANTY AND IT IS THE ONLY WARRANTY MADE BY BLAUPUNKT.

BLAUPUNKT MAKES

AND

USER RECEIVES NO OTHER WARRANTY, WHETHER EXPRESS

OR IMPLIED, AND ALL WARRANTIES OF MERCHANTABILITY

AND

FITNESS FOR ANY PARTICULAR PURPOSE

ARE EXPRESSLY EXCLUDED. THE STATED EXPRESS WARRANTY IS THE EXCLUSIVE REMEDY FOR DAHAGES

AND IS IN LIEU OF ALL LIABILITIES OR OBLIGATIONS OF BLAUPUNKT.

IN NO EVENT SHALL BLAUPUNKT BE LIABLE FOR ANY DAMAGES, CLAIM, OR LOSS INCURRED BY USER (INCLUDING WITHOUT LIMITATION COMPENSATORY, INCIDENTAL, INDIRECT, SPECIAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES, LOST PROFITS, LOST SALES, OR BUSINESS, EXPENDITURES, INVESTMENTS,

OR COMMITMENTS IN CONNECTION WITH ANY BUSINESS, LOSS OF ANY GOODWILL, OR DAMAGES

RESULTING FROM LOST DATA OR INABILITY TO USE DATA) IRRESPECTIVE OF WHETHER BLAUPUNKT

HAS

BEEN INFORMED OF, KNEW OF, OR SHOULD HAVE KNOWN OF THE LIKELIHOOD OF SUCH DAMAGES, EXCEPT AS EXPRESSLY PROVIDED IN SECTION 2.

THIS LIMITATION APPLIES TO ALL CAUSES OF ACTION IN

THE AGGREGATE, INCLUDING WITHOUT LIMITATION BREACH

CONTRACT, BREACH OF WARRANTY, NEGLIGENCE, STRICT LIABILITY, MISREPRESENTATION, AND OTHER TORTS. IF BLAUPUNKT'S LIMITED WARRANTY OR LIMITATION OF LIABILITY SET FORTH IN THIS AGREEMENT SHALL FOR ANY REASON WHATSOEVER BE HELD UNENFORCEABLE OR INAPPLICABLE, USER AGREES THAT BLAUPUNKT'S LIABILITY SHALL NOT EXCEED FIFTY PERCENT (50%) OF THE LICENSE FEES PAID BY USER TO BLAUPUNKT WITH RESPECT TO THE PRODUCTS AT ISSUE.

Some states do not allow the exclusion or limitation of incidental or consequential damages or the limitation of duration of an implied warranty,

so the limitation or exclusion herein may not apply to you. This warranty shall not be applicable to the extent that any provision of this warranty is prohibited by any federal, state,

or local law which cannot be preempted.

This warranty gives you

specific legal rights,

and you may also have other rights which vary from state to state.

3. MISCELLANEOUS:

This is the exclusive agreement between Blaupunkt and you regarding its

subject matter.

You may not assign any part of this agreement without Blaupunkt'a prior

written consent.

This agreement shall be governed by the internal laws of California.

You shall pay any taxes on the Product or transactions,

except for those baaed on

Blaupunkt's annual net income.

If any provision of this Agreement is declared invalid or unenforceable, the remaining provisions of the Agreement shall remain in effect.

Any notice under this Agreement shall

be delivered by U.S. certified mail,

return receipt requested,

or by overnight courier to

Blaupunkt. U.S. GOVERNMENT RESTRICTED RIGHTS:

Use, duplication,

discloeure

by the government is

subject to restrictions as set forth in subparagraph

(c)(l)(ii)

of the Rights in Technical Data and computer Software clause of DFARS 252.227-7013 or subparagraphs (c)(l) and (2) of the Commercial Computer software-Restricted Right at

CFR 52.227-19, as applicable.

INTRODUCTION TO BLAUBOX

Congratulations! You have just purchased BLAUBOX; the most cost effective

solution to woofer box computer modeling available to the retailer,

consumer,

and audio enthusiast today!

technical,

Although the material is quite

I have taken great pains at making BLAUBOX as “user friendly”

as possible.

BLAUBOX was primarily designed to assist the retailer in designing high technology subwoofer enclosures that were previously out of reach for most businesses. Although some retailers have had the luxury of knowledgeable persons on staff, most have not.

BLAUBOX.is

so easy to use that I envision it as a sales tool, as much as a

shop tool, for the final construction.

It can be installed on multiple

computers at one location in order to help educate everyone in the

business and not just an on-site computer “guru”.

We have even included a

simple

“math calculator”

which converts cubic feet to inches, or liters,

whatever might exist in the speaker world.

Going a step further, the user

can even print out the wood cuts of plywood necessary for box construction

so there is no longer confusion in how to even use the table saw! With BLAUBOX you are offered the option of designing a subwoofer enclosure

that will be optimized for the speaker,

or design an enclosure that will

be physically optimized for the vehicle.

You are able to compare the

performance of two entirely different speaker/enclosure combinations at

the same time which can often help guide the uneducated consumer away from

the “big woofer/little box”

syndrome by graphically plotting the frequency

response differences of such designs.

BLAUBOX is an experimental tool;

computer optimized data will not always be perfect because the computer

often creates a performance compromise between several parameters.

This

is especially true for

bandpass

boxes where a little time spent

experimenting with chamber sizes and tuning can improve the performance

substantially!

(Please bear in mind that BLAUBOX cannot foresee the resulting frequency response of the finished enclosure once it’s installed in the car.

As with any speaker modeling program, the acoustical transfer

function - the resulting frequency response and its amount of bass boost

is different for every single car,

so it is very difficult to predict.)

BLAUBOX addresses simple sealed and vented box designs, but also moves into complex single and double vented

bandpass

box designs, plus isobaric

configurations.

A total of 10 boxes using rectangular, wedge, and

tubular box geometries are calculated.

For ease of understanding, a pop- up graphics screen showing a cross-sectional view of all 10 enclosures is available. Physics dictates the bigger the box the better, so we do not recommend lunging after the smallest box from the start.

Other areas of BLAUBOX include a “Speaker Parameter Database” that has all

the Blaupunkt woofer parameters pre-loaded so no computer programming is

needed and the user

ca’nnot

accidentally delete them.

crossover network designs, including 6,

A section on passive

12, and 18 db/octave (highpass and

lowpass) is included for the folks that like to “roll their own”. For

those users that are uncomfortable with the operation of BLAUBOX, we have included on-line sections on “How to Use BLAUBOX”.

For the person that cannot decide which box, or driver to choose, we have included an on-line section, “Tech Talk on Woofer Box Design”.

Finally, you have in hand the BLAUBOX owner’s manual which includes several technical appendixes discussing acoustics, electronics, and box design.

I highly recommend you reference it if you get stuck on some

technical details; I think you will find it very informative. We continue to work on future updates and improvements and appreciate any

suggestions for upcoming editions.

Good luck and good “woofing”

Thomas D. Breithaupt

Senior Audio Design Engineer

BlaupunktlUSA

QUICK

We feel that BLAUBOX is one of the easiest computer programs to operate,

bar none. The sales floor person,

comfortable with its operation within 30 minutes.

to the person with moderate experience in using IBM personal computers and

the use of the DOS operating system.

BEFORE DOING ANYTHING ELSE....

QUICK START

STMT

& HELP

as well as the installer, should become

This page is dedicated

Make sure you have the proper floppy disk format for your computer drive video card and monitor in order to take advantage of resolution graphics.

Read the software license agreement before opening the disk envelope. Record your name,

the owner's manual for future reference. printed on the disk.)

Record the appropriate information on the owner's registration card and mail in immediately in order to receive free telephone support.

Insert the disk into the 'a' drive of the computer and call up the "a:"

DOS prompt.

(3.5"-720k

5.25"-1.2mb).

address, and disk information on the inside cover of

Also, you must have an EGA or VGA

BLAUBOX's

(BLAUBOX version number is

high

Type INSTALL and an installation instructions screen will appear.

Choose "auto-install" or type in a preferred subdirectory for BLAUBOX

to be installed in. your desired subdirectory, called

Once installed, type BLAUBOX to start the program.

HELP'

Fortechnical

literature describing Blaupunkt automotive audio products, please call or write our Marketing staff at the following address:

ROBERT BOSCH CORPORATION, BLAUPUNRT DIVISION DEPARTMENT 2800 SOUTH 25TH AVENUE BROADVIEW, ILLINOIS 60153, USA l-800-323-1943

For additional information on IBM PC programs for vehicle installer training, write to the following address:

TRANSDIMENSIONAL RESEARCH

4752 FM 1960 WEST HOUSTON, TEXAS 77069, USA

questions beyond the scope of this manual, and/or product

UA/CMA

and retail point of sale programs, Blaupunkt recommends you

(BLAUBOX will create its own subdirectory, under

BLAUl).

For assistance in obtaining odd sized inductors and capacitors, Blaupunkt recommends you contact the following company for quick service:

MADISOUND SPEAKER COMPONENTS 8608 UNIVERSITY GREEN, BOX 4283 MADISON, WI 53711

608-831-3433

PC INSTALLATION

PC REQUIREMENTS

BLAUBOX is offered for IBM compatible personal computers onlv. The following

COMPUTER: DRIVES:

MEMORY:

GRAPHICS:

DOS:

PRINTER:

MOUSE:

hardware requirements are needed for BLAUBOX to-run properly.

IBM

PC/XT(8086), AT(80286), 80386(and

SX), or

80486(and

SX)

FLOPPY DRIVE:

3.5"(720k

format) or

5.25"(1.2mb

format) for reading the distribution disk (BLAUBOX will run from the floppy but terribly slow; it is not recommended)

HARD DISK: for running the program (must be named drive

"c")

512k

RAM

VGA (monochrome or color) or EGA (monochrome or color).

Although EGA will operate well,

the graphics screens on some

computers may be truncated at the bottom part of the screen;

VGA is highly recommended if at all practicable.

3.3 or later (3.3 is needed to access the VGA video functions and the 3.5" floppy disk)

Epson 9 pin dot matrix or compatible Epson 24 pin dot matrix or compatible Hewlett Packard

Laserjet

II or compatible (75, 150, or 300 DPI;

300 DPI is recommended for only the most patient of users

print time can be upwards of 10 minutes per page)

Microsoft or compatible (optional)

Again, before

goins

anv further please do the

followinu...

Make sure you have the proper floppy disk format for your computer

drive

(3.5"-720k

5.25"-1.2mb).

Read the software license agreement before opening the disk envelope. Record your name, address,

and disk information on the inside cover of the owner's manual for future reference. printed on the disk.)

(BLAUBOX version number is

Record the appropriate information on the owner's registration card and mail in immediately in order to receive free telephone support.

PC INSTALLATION

1. Enter DOS, then get the

c:\>

prompt on screen by typing

then ENTER

2. Insert the BLAUBOX disk into drive a (or b, but preferably a).

3. Type a: and press ENTER.

(The screen should read a:\>)

4. Type INSTALL then press ENTER.

You will have two options:

A. BLAUBOX will ask you if you want it to "auto-install" to the hard

disk assuming

'c'.

program will

If so, simply hit the function key

and the

install all the files.

If not, read on...

B. To do a manual install hit the

key, and you will have a choice of

another hard disk (for example D or

and also a unique

subdirectory.

Now you must type your desired subdirectory (D:\SUBS

for example) and BLAUBOX will create its directory

(BLAUl)

under

your desired directory.

The files will automatically install.

5. Once all of the files are installed from either of the above methods, simply type BLAUBOX and the program will start.

INfiTALLATION

(Cunt

‘d)

STARTING BLAUBOX Follow the installation process,

as explained on the previous page, simply

type BLAUBOX to start the program.

This starts BLAUBOX immediately after the installation but for future sessions you need to perform the following steps,

as with any DOS program.

Type C: then press ENTER to ensure you are into the hard disk. screen should read

c:\>)

(The

Type

CD\

then ENTER to get to the root directory.

read

c:\>)

(The screen should

Type CD

BLAUl

(assuming you used the auto-install routine) then ENTER.

(The screen should read

c:\BLAUl>)

Type BLAUBOX then ENTER and the program will begin with the opening graphics screen.

(A really neat feature of BLAUBOX is its ability

"feel out" your PC for the proper graphics screen. If you have VGA video, the program will automatically default so you don't have to mess around with the color standards screen.)

The opening screen will come up with a white background and colorful geometric shapes.

Hit any key and it automatically flip over to a reference screen with references to the writers of the program and where to call for help, should it be required.

Press any key again to exit this reference screen.

You will then

move into the MAIN MENU screen automatically.

Once into the program, you should immediately move down to the PRINTER, COLOR, USER, AND MATERIALS screen and set up your printer, monitor, and dealer name for future sessions.

(Please refer to the section

regarding SCREEN 5 for more assistance.)

GENERAL COMMENTS ON RUNNING BLAUBGX The following are some general comments on running BLAUBOX that can be helpful in speeding up the entry of data and/or understanding the syntax used in the BLAUBOX owners manual. If you are completely confused with BLAUBOX please call our 800 telephone number before you cause irreparable

damage to your computer, your ego, your body, or the Earth's ozone layer.

The "ENTER" command simply tells you to hit the enter key which is found

on most PC keyboards on the far right side. The "ESCAPE" command tells you to hit the escape key on the upper left corner of most IBM PC keyboards.

This allows you to "escape" out of the last screen in BLAUBOX

assuming you are either done or didn't intend to get into the screen you

are in,

in the first place.

"Cursor"

is used both as a verb and a noun in BLAUBOX. Cursor may imply

tapping the arrow keys to move around the highlight bar eventually

highlighting a particular area and then hit the ENTER key. Technically

speakeing, the cursor is the little blinking light on a computer waiting

for an input.

To follow in this key naming business, BLAUBOX also uses

several of the function keys on IBM PC keyboards. If you see a command in

the BLAUBOX owner's manual referencing

for example, this means to hit

the function key F3 and not type in capital F and then 3.

(Although this

sounds really stupid to the experienced PC user, many people don't

understand this.

Remember, you may have been there once also....)

"Highlight" bars are the areas where a little box wraps around a

particular command that you want action on.

For example, on the MAIN

MENU, a highlight bar may draw your attention to the top line.

You can

then user the arrow keys to move the bar up or down and then hit ENTER. Another neat feature'in BLAUBOX is the ability to work even faster by not

using the arrow keys to move around the screens.

Distinctive letters are

INSTALLATION

(Cont’d)

noted in bolder type inside the highlight bars or on the MAIN MENU.

For

example,

on the MAIN MENU look at the first letters of every word.

If the

highlight bar is at the top of the screen and you want to access the RESET

BLAUBOX command, instead of cursoring down 7 keystrokes, you only have to

hit the letter

“R”

one time and the window for RESET BLAUBOX will open.

On a technical note, BLAUBOX uses small signal

Thiele/Small

computer

modeling to give a predicted performance.

First, two guys named Thiele and Small created a method to model the mechanical motion of a loudspeaker and simulate it using electronic circuit diagrams.

But, this model is only accurate at low to moderate power levels. speaker into non-linear conditions (i.e.,

When you start driving the

approaching the rated rms power for a driver) the model breaks down because the operation of the speaker is no longer “linear”. Also, once the enclosure is installed in a vehicle, the acoustic transfer function for that car will often significantly modify the woofer’s frequency response as heard at the driver’s location (often for the better).

In the early design stages of BLAUBOX we debated the advantages of

plotting displacement limited performance plots of speakers which clearly

show the frequencies and power levels where a woofer starts to distort.

But, this requires proper interpretation of the data by the user and a judgemental value what is tolerable for the consumer.

Because of possible

misinterpretation!

we left it out of BLAUBOX but may include it in an

upcoming version if demand is high.

Another technical item involves the port tubes called out by BLAUBOX. The program only uses round port tubes because they are readily available

(e.g.,

PVC pipe from your local hardware store) and they maintain

reasonable cross-sectional area to prevent wind noise.

Inevitably, some

person would like a port

l/2”

thick by 24” wide to maintain the proper

port opening area.

Simple math calculations can be made to find this area but things becomes non-linear again so we do not recommend you venture into this

“snake pit”.

An added note is important regarding the

bandpass

box design with

supplementary inductors.

Blaupunkt is not an immediate supplier of odd

sized passive components but we strongly recommend “Madisound Speaker

Components”,

860.8 University Green, Box 4283, Madison, Wisconsin, 53711,

608-831-3433. Please try to browse over the rest of the BLAUBOX owner’s manual when you

are desperate for entertainment; there’s some neat stuff inside.

MAIN

NAVIGATING THE MAIN MENU

Moving around the MAIN MENU is done by simply using the standard

cursor/arrow keys on the key board. using the up/down arrow keys.

Move the highlight bar up or down

Once you highlight the desired function of

the MAIN MENU, press the ENTER key and you will jump to the desired

function screen.

If you have a mouse, the left mouse button will act as

the ENTER key on the keyboard,

the right key acts as the escape key.

Help screens are offered for Screens 1 to 7 on the MAIN MENU. These help

screens are accessed by simply highlighting the desired function and then pressing the function key

fl.

A window will open up with a discussion of

the various functions.

BLAUPUNKT "BLAUBOX" MAIN MENU

Screen

1 -

Enclosure Performance Calculations

Screen 2

Screen 3

Screen 4

Screen 5

Screen 6

Screen 7

Final Box Fabrication Speaker Parameter Database Crossover Design Printer,

Color, User and Materials Configuration Using BLAUBOX Tech Talk on Woofer Box Design

Reset BLAUBOX Quit BLAUBOX to DOS

____~~~-___~__-_~~___~~~~~__~~~________________________________

UP OR DOWN AND THEN HIT ENTER

Calculate Response for Enclosure

q HELP

RESET

BLAUBOX

After doing several simulations with various boxes and woofers, the user

may become confused exactly what he is comparing.

More so,

if several people have been working on the same machine the various users may get their design confused with the previous user's.

The best solution is to

have a "master reset" that can reset all parameters to zero (or blanks)

and restart the program without exiting and transitioning back to DOS. This feature is very useful considering the typical interruptions in the

business day.

The next person can

"clear out" the last values without

restarting the computer.

If a menuing program is installed, restarting isn't a real problem, but if the computer is a dedicated machine on the sales floor where you don't want consumers

"dinking

around", you can setup

BLAUBOX to run, and walk away;

restarting for different sales people is

then "brain dead simple".

"Reset" should be done every time

a-new

runs BLAUBOX, and especially for a new customer.

person

QUIT BLAUBOX

AHD RETURN

TO DOS Once you are done using any computer program, it is always best to the program "gracefully" using its appropriate exit command.

This

_ _.

_ .

. _

exit

prevents loading

Junk

into the memory of the computer that might conflict

with the next program to be used.

This also prevents any computer program from being damaged by a voltage spike if you turn the machine off while inside the program for example.

To gracefully quit BLAUBOX and return to DOS, simply highlight QUIT

BLAUBOX AND RETURN TO DOS, hit the ENTER key and the program will release

felicitously to the DOS prompt.

If you have a menuing program installed, such as Direct Access, BLAUBOX will close down and the main menu for the menuing program will come up without cryptic DOS jargon in between.

SCREEN 1: ENCLOSURE PERFORMANCE CALCULATIONS

Screen 1 allows the user to plot the frequency response performance of

one,

or two totally different subwoofer box designs, using the same, or

different, woofers and/or boxes. WOOFER CHOICE

This function asks you to choose the woofers for comparison purposes. The cursor defaults to highlighting WOOFER CHOICE when you move into this

screen.

key while

You must first choose a woofer, woofer 1, by pressing the ENTER

highlighting WOOFER CHOICE.

the ENTER key again,

While highlighting WOOFER 1, hit

and a window opens up with the woofers from the

database shown.

Cursor around until you highlight the woofer of your

choice, then hit the ENTER key.

The window will close and you are ready

to choose WOOFER 2 or move on to

chasing

the enclosure under BOX STYLE.

BLAUPUNKT “BLAUBOX” SCREEN 1 - ENCLOSURE PERFORMANCE CALCULATIONS

~OCIFER

CHOICE 1BOX STYLE

MODIFY BOX

PLOT RESPONSE

BOX MATH

Woofer

NONE

Box #l Style

: s

SEALED BOX

Box #l Type

COMPUTER-GENERATED OPTIMUM BOX SIZE

Box #I Volume :

0.00 CU FT

Woofer

NONE

Box #2 Style

: s

SEALED BOX

Box #2 Type

COMPUTER-GENERATED OPTIMUM BOX SIZE

Box #2 Volume :

0.00 CU FT

- . -

r-.. ..-,y-

~-._._---“--

Pick

Woofer

q HELP

ESC: Ignore

BOX STYLE Here you choose the desired box style to use, e.g., sealed box, vented box, or

bandpags

designs.

Move the cursor to highlight BOX STYLE, hit ENTER, and a window will open up asking if you want to choose a box style for WOOFER 1 and/or WOOFER 2. Highlight the woofer

your choice,

hit ENTER, and a window will open up

with the various box styles that BLAUBOX supports.

A really cool function

is available by hitting F2 which shows a graphical representation of the

various boxes.

This is very helpful for the people not comfortable with

the various box designs.

BLAUPUNKT “BLAUBOX” SCREEN 1 - ENCLOSURE PERFORMANCE CALCULATIONS

WOOFER CHOICE’ 1 BOX STYLE

1MODIFY

BOX

PLOT RESPONSE BOX MATH

= SEALED BOX

SEALED BOX

SEALED BOX (ISOBARIC)

= VENTED BOX

SINGLE VENT

VI= VENTED BOX

SINGLE VENT (ISOBARIC) BP4 = BANDPASS BOX -> SINGLE VENT

BP41=

BANDPASS BOX -> SINGLE VENT (ISOBARIC) BPS = BANDPASS BOX -> SINGLE VENT WITH INDUCTOR

BPSI-

BANDPASS BOX -> SINGLE VENT (ISOBARIC) WITH INDUCTOR BP6 = BANDPASS BOX -> DOUBLE VENT

BP61=

BANDPASS BOX -> DOUBLE VENT (ISOBARIC)

----_

F2: Box Drawings

ENTER: Select ESC: Ignore

Choose Box 1 Type

Fl =

HELP ESC = MAIN MENU

SCREEN

ENCLOSURE PERFORMANCE CALCULATIONS

(Cont'dl

MODIFY BOX

BLAUBOX will automatically default to optimum

size.boxes

for a given

woofer and box style.

But, using MODIFY BOX, the user can force the box

volume to something larger, or smaller, than optimum.

"Optimum" is

defined as the smallest box with a reasonably flat frequency response. If you have a particular box size in mind, first highlight USER-SPECIFIED

BOX

#l,

and a window will open up asking for your desired box volume

Using the numbers on the keyboard, type in the desired box volume

ani

hit

the CONTROL and ENTER keys simultaneously to accept the value.

I==-

BLAUPUNKT “BLAUBOX” SCREEN 1 - ENCLOSURE PERFORMANCE CALCULATIONS

WOOFER CHOICE

BOX STYLE 1 MODIFY BOX ] PLOT RESPONSE

BOX MATH

COMPUTER-GENER

R-SPECIFIED BOX

Woofer

NONE

Box #l Style

: s

SEALED BOX

Box #l Type

COMPUTER-GENERATED OPTIMUM

BOX

SIZE

‘--

Box #l Volume

0.00

CU FT

Enter Box #I Parameters

Box Size Vf

CTRL-Enter:

User Specifies Box #l Size

Fl =

HELP

ESC: Ignore

BOX

MATH

BOX MATH is a handy calculator used to convert dimensions and volumes

common to the speaker engineering area such as liters and cubic feet. To enter this function,

highlight BOX MATH, hit ENTER, and a window will give you several choices of conversions. For example, when measuring the trunk in a car, most people use a ruler in inches.

inches x inches] you get cubic inches,

Multiplying [inches x

but many are lost in the conversion to cubic feet which is necessary for most box designs. Simply cursor down to CONVERT CUBIC IN TO CUBIC FT, hit the ENTER key, enter the value in cubic inches,

and the value in cubic feet will be immediately shown.

Other conversion functions under BOX MATH work similarly.

BLAUPUNKT

“ELAUBOX”

SCREEN 1 - ENCLOSURE PERFORMANCE CALCUL

OOFER CHOICE

BOX STYLE

MODIFY BOX

PLOT RESPONSE

Cubic Inches T

Convert Cubic Inches to Cubic Feet

Fl =

HELP

ESC = MAIN MENU

SCREEN 1: ENCLOSURE PERFORMANCE CALCULATION!

(Cod

‘d)

PLOT RESPONSE Here we finally show the predicted frequency response plot of the desired woofer in the desired box.

You can graphically see not only the frequency

response but also get a feel of efficiency differences.

The more complex

bandpass

designs take more work to build but the hard work pays off with

the gains in efficiency and typically lower cutoff frequencies. To use PLOT RESPONSE, highlight this function and hit ENTER.

A window

will open up asking "CRT Plot or Printer Plot".

If CRT is chosen, the

frequency response plot will be drawn on the monitor.

If Printer Plot is

chosen,

the frequency response will be sent to the printer.

Print times

will average about 2 minutes per page because of the intense graphic

routines;

substantially longer times are likely using a

Laserjet

printer.

BLAUPUNKT

BOX RESPONSE PROGRAM

WOOFER

11: BIAU

ACS 1221

;:t$"'=,B;N;;A;; BDBXOK>,D~~BBLE,~~TC~S~~ARIC)

1 ff:

7j.O

BOX

fr:

3b.O

= SEALED BOX

-->

SEALED BOX

BOX #2

Vr:

0.00 Cu Ft

100

db 90

Dealer.

Timmy Tom's Stereo

Prepared for: Bill

Bob Buchsteiner

123 Main Street

12Y4

Boboloui

Ln Nowheresville. IL 60563

(600)-123-1234

Bumtwonger, AR 52667

(201)-555-1234

SCREEN

FINAL

BOX

FABRICATION

This screen allows the user to choose the final box geometry, force the

dimensions to a value other than ideal, calculate port tube sizes, and

print the drawing of the box to the monitor screen or the printer.

Box SHAPE

This function asks you to choose the box shape, be it rectangular, tubular, or wedge shaped.

The cursor (and the program) default to highlighting the rectangular box. If you wish to continue with the rectangular box simply hit the ENTER key or escape out using the escape key.

If you want to change the box shape to tubular let’s say, highlight the TUBULAR- function and hit ENTER window will close and you are ready to move on to MODIFY

DIME=;.

The

BLAUPUNKT “BLAUBOX” SCREEN 2 - FINAL BOX FABRICATION

MODIFY DIMENSIONS

PORT

BOX MATH DRAW BOX

Pick Shape for Box

ENTER: Select ESC: Ignore

Material Thickness:

0.750 (INCHES)

F5:

Select Box

Specify Box Geometry (Shape)

= HELP ESC = MAIN MENU

MODIFY DIMENSIONS

Here you can modify the box dimensions to fit a particular space.

Move the cursor to highlight MODIFY DIMENSIONS and hit ENTER.

A window will open up showing a box volume that comes from Screen 1 and then asks for the modified dimensions. Using the tubular example above, the optimum volume is shown and this volume must be noted (mentally or on paper).

You

now enter a number for the length and diameter (outside dimensions) and

the computer will quickly recalculate the box volumes for the numbers you

have inputed.

If the revised values are different than the original values, you must repeatedly input different numbers until the revised box volume is close to the original box volume.

BLAUPUNKT “BLAUBOX” S REEN 2 - FINAL BOX FABRICATION

BOX SHAPE

[MODIFY DIMENSIONS

PORT

BOX MATH DRAW BOX

Variable Volume - Compound Box -- Box

1: 1.16 CU FT

Votume

2: 1.16 CU FT

Height

13.00

Width

14.00

Width 2

14.00

Depth

15.00

Material

Thickness:

0.750

CTRL-Enter: Accept ESC: Ignore

Material

Thickness: 0.750 (INCHES)

F5:

Select Box

Enter Box Dimensions

= HELP ESC = MAIN MENU

QCREEN

2: FINAL

BOX

FABRICATION

(Cunt’d)

PORT allows you to vary the port tube diameter (for vented boxes of course) and calculate the proper length considering this diameter.

To enter the PORT function, cursor until you highlight PORT, hit ENTER and

a window will open up showing the tuning frequency(s) for the box.

The

cursor highlights the area asking for a diameter, enter a diameter (for

example, 4.0 inches), hit ENTER, and the port tube length for this tuning

frequency and diameter will be shown. You

must

keep in mind that the port

may become too long inside a particular box but this can be easily

remedied by using "U and L" shaped PVC.

Simply

measure along the center

area of

the bends to get the proper length.

- -

BLAUPUNKT "BLAUBOX" SCREEN 2 - FINAL BOX FABRICATION

MODIFY DIMENSIONS [ PORT j BOX MATH

DRAW BOX

Design Port for Box # 2

Port Diameter:

3.000 IN

Port Length

1.79 IN

318

0.375

112

= 0.5

5/a = 0.625

3/4 = 0.75

7/a = 0.875

- -

CtrI-ENTER = Accept

Material Thickness: 0.750 (INCHES )

F5:

Select Box

Choose Port Sizes

= HELP

ESC = MAIN MENU

BOX

MATH

_..

This

is the same

calculator as inside Screen 1 which allows you to convert

dimensions and volumes commonly found in the speaker building process. To enter BOX

MATH,

highlight BOX MATH, hit ENTER, and a window opens

offering you several conversions.

in a car,

For example, when measuring the trunk

most people use a ruler in inches.

x inches] you get cubic inches,

Multiplying [inches x inches

this to cubic feet.

but many people may not be able to convert

Simply cursor down using the arrow keys, highlight

CONVERT CUBIC IN TO CUBIC FT, hit the ENTER key, enter the value in cubic

inches,

and the value in cubic feet will be shown.

---

BLAUPUNKT "ELAUBOX" SCREEN 2 - FINAL BOX FABRICATION

BOX SHAPE

MODIFY DIMENSIONS

PORT 1 BOX MATH 1 DRAW BOX

Cu In:

2147.00

Ft:

1.24

ESC: Quit

Material Thickness: 0.750 (INCHES)

Convert Cubic

Ipches

to Cubic Feet

= HELP

ESC = MAIN MENU

SCREEN

2: FINAL

BOX

FABRICATION (Cont’d)

DRAW

BOX

This function allows the user to print out the enclosure layout plans. These plans can be drawn to the screen of the computer, or, print to the paper printer. or to Printer”

SPECIAL NOTE: ONLY BOX #1 IS DRAWN ON THE “Draw to screen

the time.

ROUTINE, regardless of the box chosen within Screen 2 at

First highlight the DRAW BOX area, hit ENTER, and a small window will open asking you “Draw to the screen or printer”.

Using the cursor up/down

keys, choose your destination, and press ENTER.

A drawing of the box will

then appear on the screen or will be sent to the printer.

Remember, you

must have chosen a printer in the setup screen (Screen 5) before you can print.

BLAUBOX .

Otherwise the program may crash and you will have to restart

Regarding printing to paper, patience is in order for the Laserprinter owner.

As with any graphics intensive program talking to a Laserprinter,

it can take considerable time to finish all copies.

We recommend that you make preliminary prints in the 75 DPI setup in order to obtain prints in about 2 minutes per page.

About 4 minutes per page is required for 150

DPI, and about 10 minutes per page for 300 Dpi (the printouts here look

like they are typeset!).

Prints to dot-matrix printers take about 2

minutes per page but they never looks as good as the laser stuff.

Once the print is made to paper, you will notice that several cuts may be

made on the wedge shaped box.

Stepping down the page, progressive cuts are made so singular saw blade changes have to be made and the wood is cut progressively smaller.

Customer: Billy Bob

Buchsteiner

15”

- l/T’

24”

; i ; :

: i

: :

;

i : : :

: ; ! :

SCREEN

SPEAKER PARAMETER DATABASE

SCREEN 3 permits the user to choose a woofer for a “DESIGN” be it woofer

#2,

modify existing driver parameters,

delete, or add speakers to

the database. SCROLL DATABASE

Using the cursor keys, highlight SCROLL DATABASE, hit ENTER, and a window

will open up asking for the first letter(s) of the woofer you might be

looking for. first woofer beginning with the letter woofers starting with numbers following the name and arrange them in ascending order.

Type in a letter (“B” for Blaupunkt for example) and the

“B”

exist,

will come up.

the search will then look at the model

If several

If you

want to just scroll up or down through the database, you can hit F3 to

look at previous woofers, and F4 to look at woofers in later order.

BLAUPUNKT “BLAUBOX” SCREEN 3 - SPEAKER PARAMETER DATABASE

SCROLL DATABASE/ MODIFY WOOFER

DELETE WOOFER ADD WOOFER

r=-

.--_-_ .__~~~__ .____.

Scroll Through Database

= HELP

ESC =

MAIN

MODIFY WOOFER

Here you can modify the Thiele/Small parameters for a woofer.

To prevent

accidental erasure or modification of the pre-installed Blaupunkt woofers,

their parameters are “hard-installed” so they are non-changeable.

To modify a wobfer, move the cursor to highlight MODIFY WOOFER and hit

ENTER.

A window will open up showing the various woofers in alphabetical

order. Cursor left/right and up/down using the cursor arrow keys until

you highlight the desired woofer to be modified, and hit ENTER

window will open up showing the various performance parameters:

cursor keys, highlight the desired parameter,

and hit ENTER.

Once you have typed in all desired parameters, hit the

type in the desired value,

CONTROL and ESCAPE keys at the same time to lock in the values.

enter this screen and decide YOU mav not

hit the escape key to back out gracefully.

BLAUPUNh

SCROLL DATABASE

“BLAUBOX” SCREEN 3 - SPEAKER PARAMETER DATABASE

MODIFY WOOFER

Pick Uoofer ACS 1221 BLAU ACS 1521

BLAU ACS 8021

really

want to be here, simply

]

DELETE WOOFER ADD UCOFER

A new Using the

If you

Modify Existing Speaker in

DataBase

= HELP

ESC = MAIN MENU

SCREEN 3: SPEAKER PARAMETER DATABASE

(Cant

‘d)

DELETE WOOFER

This function allows the user to delete a woofer and its parameters from the database.

Again, Blaupunkt woofers cannot be deleted or modified.

Using the cursor keys,

highlight DELETE WOOFER, hit ENTER, and a window

will open up listing the installed woofers.

Moving the cursor keys,

highlight the woofer to be deleted, and again hit ENTER

will open up reminding you that your woofer is

A final window

about-be

deleted then

asking you for a Y(yes) or N(no) to follow through with the deletion.

BLAUPUNKT "BLAUBOX" SCREEN 3 - SPEAKER PARAMETER DATABASE

SCROLL DATABASE

MODIFY WOOFER

DELETE WOOFER

ADD WOOFER

Pick Woofer

ACS 1221

BLAU

ACS 1521

BLAU ACS 8021

Delete Existing Woofer from DatabaseFl = HELP

ESC = MAIN MENV

ADD

WOOFER

This function allows the user to add a woofer to the database, up to 1 000 drivers.

Any brand of woofer can be added but the parameters are

limiied

to those in BLAUBOX.

To add a woofer, move the cursor to highlight ADD WOOFER and hit ENTER. window will open up prompting you for the woofer name.

Type in the woofer

name and its model number immediately next to it and hit ENTER.

cursor will step down asking for the Qts parameter.

The

only show Qes and Qms parameters,

Now, if your woofers

highlight the window stating "Total Qt"

hit the space bar to toggle out of Qts, and you will see the highlight

ba;

showing "Separate Qes and Qms".

Now hit ENTER, and the comment areas for

entering Qes and Qms will open up.

Input the values, hit ENTER, and the

cursor will step down to the next entry.

Once all values are filled, press CONTROL and ENTER keys at the same time to lock the woofer into the database.

If you think you screwed up somewhere, hit the ESCAPE key to

back out, a window will ask you if you are sure.

BLAUPUNKT "BLAUBOX" SCREEN 3 - SPEAKER PARAMETER DATABASE

SCROLL DATABASE MODIFY WOOFER

DELETE WOOFER r ADD WOOFER

]

Woofer Parameters

Woofer Name

MAX0 WACO

--__-__----___---___~~~______~~~~_______~~~~~~_~______

Choose Q Type

Total

Total Q

(PTS):

0.850

Resonant

Freq. (fs):

14.00 HERTZ

Equiv. Volume

(Vas):

14.70

CU FT

DC Resistance

(Re):

1.00

OHMS

Max.

Contin.

Power

780

WATTS RMS

Excursion

(Xmax):

2.500

INCHES

Cone Diameter

24.00 INCHES

Category Diameter

23.00 INCHES

Use SPACE bar to select P type and Units

---- Ctrl-ENTER: Accept

ESC: Ignore Changes

Add New Woofer/Parameters to Database Fl = HELP

ESC = MAIN MENU

SCREEN 4:

CRO380VER

NETWORK

DESIBN

Screen 4 assists the user in creating passive crossovers for woofers and tweeters by inputing the crossover frequency, the impedance of the driver

(woofer or tweeter),

and the desired roll-off slope.

Blaupunkt is not able to supply odd sized inductors and capacitors so we strongly recommend you contact "Madisound Speaker Components", 8608 University Green, Box 4283, Madison, WI, 53711, 608-831-3433.

CDB-LP,

lZDB-LP, 18DB-LP (Lowpass

crossovers) Using the cursor keys, highlight the desired crossover slope, hit ENTER, and a window will open up asking for the termination load impedance in ohms (most car speakers are 4 ohms and so BLAUBOX defaults to this).

Type

in the impedance value, hit ENTER, and the highlight bar will jump down and highlight the desired crossover frequency. Now, type in the desired crossover frequency, hit ENTER, and them follow through with the function key

A schematic drawing will then open up showing a drawing of the

network with the necessary capacitor(s) and coil(s).

--- BLAUPUNKT “BLAUBOX” Screen 4 - CROSSOVER NETWORK DESIGN

6DB-HP

IZDB-LP

IZDB-HP

18DB-LP

18DB-HP

Crossover Type: 6 db/octave Low-Pass Termination Load (Ohms):

4.00

Crossover Frequency

__.._.___________________________._..~---------------------------------

Low-Pass Ll

(mH)

7.96

SPEAKER

FlO: Calculate

ESC: Quit

Type 1 = 6

db/octave,

low-pass Fl = HELP ESC = MAIN MENU

6DB-HP, 12DB-HP, 18DB-HP

(Highpass crossovers1

Using the cursor keys, highlight the desired crossover slope, hit ENTER,

and a window will open up asking for the termination load impedance in

ohms (most car speakers are 4 ohms and so BLAUBOX defaults to this).

Type

in the impedance value, hit ENTER, and the highlight bar will jump down

and highlight the desired crossover frequency.

Now, type in the desired crossover frequency, hit ENTER, and them follow through with the function key

A schematic drawing will then open up showing a drawing of the

network with the necessary capacitor(s) and coil(s).

BLAUPUNKT “BLAUBOX” Screen 4

- CROSSOV R NETWORK DESIGN

~DB-LP

6DB-HP

12DB-LP

I&]

18DB-LP

18DB-HP

Crossover Type: 12 db/octave High-Pass

Termination Load (Ohms): 4.00

Crossover Frequency

3500

-__~__~~~~~~_~______~~___~__________~~~~~~-~~~~~~~~~~~~~~~~~~~~~~~~~~~~

High-Pass Cl

(uf) =

8.04 High-Pass Ll CmH) =

0.26

(+I---

C’

(_)/l

SPEAKER

FIO: Calculste

ESC: Quit

Type 4 = 12 db/octave, high-pass

= HELP

ESC = MAIN MENU

SCREEN 5: PRINTER, COLOR, USER, AND MATERIAL!

CONPIWRATION

This screen allows the user to change screen color, turn on mouse support,

setup dealer info,

customer info, printer choice,

,and

wood thickness.

SCREEN COLOR

Screen Color allows the user to change the screen color and turn on or off

the mouse support. Using the cursor keys,

showing screen type

highlight SCREEN COLOR, and a window will open up

and the highlight bar showing color.

BLAUBOX has the

ability to recognize the video card inside your computer automatically and

adjust the screen resolution automatically, be it EGA or VGA.

But, you

may be using a monochrome monitor so you must change to a monochrome format to read all of the print.

To switch, simply toggle to the monochrome screen by hitting the space bar and the highlighted area will then read "mono".

Hit CONTROL and ENTER at the same time and these

choices will be set in memory in the program.

handled the same way;

The mouse support is

toggle the mouse on or off and hit CONTROL and ENTER

at the same time and these choices will be set in memory.

BLAUPUNKT

"BLAUBOX" Screen 5 - CONFIGURE SCREEN, PRINTER, DEALER INFO

SCREEN COLOR j DEALER INFO

CUSTOMER INFO

MATERIAL PRINTER

Screen Color/Mono and Mouse

Support

Screen Type: Default Mouse Support: ON

Use SPACE BAR to select.

CtrL-ENTER = Accept

ESC = Ignore

Set Screen Color/Mono & Mouse On/Off

= HELP ESC = MAIN MENU

DEALER INFO

DEALER INFO allows the owner of BLAUBOX to install his name, address, and

phone into the program for final print out to the customer. Using the cursor keys, highlight DEALER INFO, hit ENTER, and a window will

open asking for the dealer information.

Type in the information and hit

CONTROL and ENTER at the same time to lock these choices in memory.

BLAUPUNKT "BLAUBOX" Screen 5 - CONFIGURE SCREEN, PRINTER, DEALER INFO

SCREEN COLOR 1 DEALER INFO 1 CUSTOMER INFO

MATERIAL

PRINTER

Enter Dealer Information

Dealer Name: Tinny Tom's Stereo Address

123 Main Street

City

Nowheresville

State

Phone

Zip: 60563

(800)-123-1234

Ctrl-ENTER = Accept

ESC = Ignore Changes

Enter/Edit Dealer Name and Address

Fl =

HELP

ESC = MAIN MENU

SCREEN

5: PRINTER, COLOR, USER, AND MATERIALS CONFIGURATION (Cont'd)

CUSTOMER INFO

CUSTOMER INFO allows the user to input the customer's name, and other pertinent information, in order to give a personalized printout of the modeling done for his vehicle.

Using the cursor keys, highlight CUSTOMER INFO, hit ENTER, and a window will open up asking for the customer's information.

appropriate data and hit CONTROL and ENTER at the same time.

choices will be locked

inmemory

until a new design is chosen for another

Type in the

These

customer, exit BLAUBOX, or reset BLAUBOX.

BLAUPUNKT WLAUBOX1’ Screen 5 - CONFIGUR SCREEN PRINTER DEALER INFO

SCREEN COLOR DEALER INFO

Enter Customer Information

me :Billy Bob Buchsteiner

AR Zip: 52667

Ctrl-ENTER

-1

Bobaloui Ln

Bumtwangcr

(2011-555-1234

or ESC = Accept

MATERIAL PRINTER

Enter/Edit Customer Name

= HELP

ESC q MAIN MENU

MATERIAL This function allows the user to set the material thickness used to build

the box. but it can be changed to any standard thickness varying from

To change the

3/4"

particle board is most common, so BLAUBOX defaults to this,

l/8"

7/8".

lhaterial

thickness default from

314"

to another value, move

the highlight bar to the right using the cursor arrow keys, and highlight

MATERIAL.

thickness of 0.75"

Hit the ENTER key, and a window will open showing the default

(3/4").

If you use wood of another thickness, merely type in the value (0.125 to 0.875) for thickness, then press the ENTER key, and the value will then be stored in permanent memory.

BLAUPUNKT “BLAUBOX” Screen 5 - CONFIGURE SCREEN, PRINTER DEALER INFO

SCREEN COLOR

l/8=0.125 5/8=0.625

DEALER INFO

Default Material Thickness

Material Thickness: 0.750 INCHES

l/4=0.25

3/4

Ctrl-ENTER =

CUSTOMER INFO

= 0.75

3/8

= 0.375

7/8

= 0.875

ESC = Ignore

1-1

l/2=0.5

PRINTER

Enter Default Material Thickness

= HELP

ESC = MAIN MENU

SCREEN 5: PRINTER, COLOR, USER, AND MATERIAL3 CONFIGURATION

(Cont'd)

PRINTER

The PRINTER function allows the user to chose the printer type that’s being used for you particular computer.

The three standards that account

for about 99% of all PC compatible installations address the Epson 9 and

24 pin standards,

and the Hewlett Packard

LaserjetII

standard.

Using the cursor keys, highlight PRINTER, hit ENTER, and a window will open up showing “Printer Type”

the printer,

and highlighting “Epson

g-pin”.

To change

simply tap the space bar until the printer choice is showing,

and then hit ENTER.

and the highlight

Using the arrow keys, step down to “Printer Port”,

bar shows

“LPTl” (LPTl

is the name for the parallel

printer port most common on PC’s).

printers,

But, if this is used by other

LPT2).

a second printer port can be used if the machine has it (namely,

Once the printer type and port are defined, simply hit the CONTROL

and ENTER keys at the same time to store them in memory.

As previously mentioned,

although

Laserjet

printers offer excellent print quality, a trade-off exists regarding time to print from BLAUBOX as with any graphics intensive program.

75 DPI setting for “roughing in”

We strongly recommend that you choose the

print time.

box designs which greatly reduces the

outs.

Once complete, then switch to 300 DPI for high quality print

BLAUPUNKT

84BLAUBOX0’

Screen 5 - CONFIGURE SCREEN, PRINTER, DEALER INFO

SCREEN COLOR DEALER INFO

CUSTOMER INFO

MATERIAL r PRINTER

Printer Selection LaserJet II 150 DP

Use SPACE BAR or + and - to select.

Ctrl-ENTER =

ESC = Ignore

Choose Printer

Fl =

HELP ESC = MAIN MENU

SCREEN

6: USIN(3

BLAUBOX

Screen 6 offers a very basic outline on how to use the program to guide

the consumer down the right purchase path.

CUSTOHER

GUIDANCE

This is an outline of some basic qualifying questions, regarding personal

preference, to ask the customer (in a professional manner) in order to fit

the woofer box to that person’s wants and needs.

What kind of car is it? With a sedan, you usually have considerable

room for a sub box behind the rear seat.

For a hatchback, you may have similar room but may be limited by the height, or appearance, of a finished box. How much money do they want to spend? This determines whether you have the funds to build a nifty bandpass/isobaric enclosure. Does the customer want accurate or

boomy

bass? If they only listen to rap music they can tolerate a bump in the frequency response around

60hz

and will often yield higher power handling for real “pounders“.

Are they looking for an “unseen” box? A

bandpass

box emits all of its

sound from the port so this can offer a good solution for a “hidden” box not having any kind of speaker visible. How much power do they need or want?

If the person is a real “pounder”

a sealed box, or single vented

bandpass

box, should be used to improve

the power handling of the woofer. A simple vented, or double vented

bandpass

box, will unload the woofer at low frequencies thus allowing

it to bottom out on peaks and possibly destroy itself.

WOOFER CHOICE

Here you can make some decisions on which woofer to use.

Some woofers can

offer significant benefits over other units.

1. Woofer size;

want does the user really want?

“bigger

’

bt$ter”

The mistaken concept of

remains horribly rampant.

Very often, a smaller woofer in a given box will provide a lower cutoff frequency than the larger woofer. This can be beautifully modelled on

BLAUBOX’s

“PLOT

RESPONSE” screen.

2. To guide the customer into the best box for their installation, the

“BOX STYLE” feature of BLAUBOX is very useful at comparing different woofer/box combinations in hopes of coming up with a good compromise in performance, complexity, and price.

3. Be smart and start most of the designs with

10”

woofers. They are

forgiving of small boxes and offer a great compromise in power

handling, space requirements, and performance.

4. Try to use woofers with high Qts values (0.5-0.8) for sealed boxes and low Qts values for vented boxes (0.25-0.5).

Bandpass

designs favor Qts

values around 0.5 for optimum performance.

5. Try to maintain 4 ohm loads on the amplifiers through series or parallel connection of the speakers. Even though most amplifiers today

are 2 ohm stable, it still strains the amps due to the significant heat

dissipation required of the amplifier for low impedance loads.

6. Try to match the power output of the amplifier with the woofer’s rms

power handling values.

Huge amplifiers driving 50 watt rms speakers is

kind of “boneheaded”.

SCREEN 6: USING BLAUBOX (Cont'd)

BOX

STYLE Many box styles can be used to make bass, each.

but, pro’s and con’s exist for

The following list is terribly short but encompass 90% of the

styles used today in the car or home.

A sealed box is simple to build, will take lots of power due to the

box

’ s

“air spring”,

and sounds reasonably good in most installations. But, the -3db frequency is much higher than a vented box for example. This is the best design for

“inexperienced” box builders because of its tolerance to sloppy construction. A vented box will provide a lower response than a sealed box but the

woofer can become unloaded and begin to move excessively below its

frequency due to the loss of an air load on the back side of the

-3db

driver. The single vented

bandpass

box is probably the best design for the car because it offers the low frequency response of the simple vented box but also an interior sealed chamber provides an “air spring” cushion&g the back side of the woofer.

Unfortunately, it is more complicated to build than the simple sealed or vented boxes above but the performance results certainly justify the extra expense

involv;d.

The single vented

bandpass

box with series coil operates the same as

the regular box but adds an inductor in series with the woofer.

This

sometimes adds a small bump in the frequency response below the normal cutoff frequency for the box thus giving 1-2 db of extra gain at the very low frequencies for that extra “punch” in the low end.

It will

also reduce a lot of the high harmonics from an amplifier being overdriven. The double vented

bandpass

box offers even lower frequency response and

higher efficiency than the above boxes

, but,

it is very‘sensitive to

lousy construction techniques. Like simple vented boxes, it will become unloaded below the -3db frequency,

but with higher distortion

and more devastating results when the woofer fails.

FABRICATION

(of the

final box) FABRICATION is a short discussion of the various box designs and their final fabrication.

First, measure the trunk volume that is available (measure and multiply length x width x height to get cubic inches). Use “BOX MATH” to convert from cubic inches to cubic feet for the “ENCLOSURE PERFORMANCE CALCULATIONS”.

Use this volume in cubic feet now in all of your BLAUBOX calculations. The rectangular box design is the simplest box to build and is recommended for most installations.

The tubular design is becoming quite popular due to the cosmetics and general ease of construction. The wedge shape maximizes the volume in most trunks but becomes more

complex to build with the various angled cuts.

All of the above designs can be modified using the MODIFY DIMENSIONS

command under screen 2. The dimensions can be changed until a box fitting the exact trunk area is designed.

By working through BLAUBOX backwards (forcing box volumes in Screen 2 and reviewing the frequency response plots in Screen

l),

you can then determine the final frequency

response once the box volume is conclusive.

The PORT command under screen 2 allows for changing the port tube

length for a given port diameter tube that is conveniently available in-house. Most importantly, using DRAW BOX, you are able to’print out a drawing of the box. make sure

Verify all dimensions before you start building the box to

the box will simply fit the speaker.

(A 15” woofer with 12”

side walls is going to require substantial creativity to make it fit

inside!

)

SCREEN

7: TECH TALK ON WOOFER BOX DESIGN

The rest of the BLAUBOX owner’s manual discusses, in detail, various speaker related subjects including acoustics, electronics, and speaker operation.

Screen 7 includes short,

so no further discussion

on-line help sections discussing these areas

of this screen will be made in this manual other than referencing the following appendixes in this manual for additional information.

BLAUPUNKT

ACOUSTICS

ACOUSTICS 1s a

fundamentals.

Acoustics

Most people can hear sound over frequencies of 20 Hz to

20,000 Hz. A piano will reproduce sound from about 50 Hz to over 10,000 Hz in the harmonics.

We can hear sound over a huge range in Loudness. Most

people with good hearing can recognize sound as Low as 0 db, the anent hearing Loss occurs ( many rock concerts average this

leveI

loudness represents a difference of times a noise at 0 db! Technically speaking, 3 db, but the human ear often needs volume differences of nearly 10 db to qualify a sound as

( 1

db is the smallest audible increment in loudness 1.

Our ear requires significantly more bass for Low

frequencies to sound as loud as mids and highs at low

“BLAUBOX” 1

dlscusslon

threshold

in the front rows

Screen 7 - TECH TALK ON WOOFER BOX DESIGN

ELECTRONICS

ACOUSTICS

of some basic acoustics

of hearing. At about 120 db perm-

a doubling of amplifier power is

WOOFER DESIGN

The 120 db range of

1,000,000,000,000

8Ywice88

Fl q HELP

BOX DESIGN

as Loud.

ESC = MAIN MENU

:.:.j .Z

.::.

Blaupunkt Blaubox Owner's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual