Velodyne ULD-15, ULD-18 Owner's Manual

Velodyne

OWNER'S MANUAL

ULD-15, ULD-18

Series

II

Subwoofer Systems

•

For Y

our

Records:

Serial Numb

er

____________

_

Date

of

Purchase _

___

_______

_

Name of Store

__

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OWNER'S MANUAL

VELODYNE ULD-15 AND ULD-18

SERIES

II

SUBWOOFER SYSTEMS

Co

ngratulations

on

your purchase of a Velodyne ULD Seri

es II Subwooler System. This system represents the

state of the art in accura

te

bass reproduction. Read and follow the instructions below to insu

re

safe and proper

syst

em

operation. Regardless

of which installati

on conf

iguration you choose, please carefully read the entire

BASIC INSTALLATION section of this manual. Save this manu

al

for future referenc

e.

Wa

rning: To

prevent fire or shock hazard, do not expose this equipment to rain or moisture. To
avoid electrical shock do not open speaker enclosure or amp chassis cover. Please observe all
warnings

on

the equipment itself. There are no user serviceable parts inside. Please refer all

service questions to your authorized Velodyne dealer.

Ca

ution

: Risk

of

hazardou

s e

nergy

. Your ULD Subwoofer System has a very powerful ampli-

fier. Exercise extreme caution.

Do

not attempt a

ny

connection or disconnecti

on

with power on.

In

spect speaker lead connections at controller a

nd

woofer terminal plat

e.

Loose strands or frayed

wire can cau

se

a dangerous shor t circuit. Keep connections out of reach of children.

Prior

To Insta

llation

: Your ULD Subwoofer Syst

em

includes the following Ihree separate components:

1

~

A cabinet incorpora ting the bass driver, servo interface jack, and speaker terminals. Observe the
above caution notice.

2) A servo

controller which includes the High Gain Servo corr

ection circuitry. a 400 watt RMS
amplifier. high and low pass crossovers, input and output jacks, level control. servo interface jack.
and speaker terminal

s.

Observe the above caution notice.

3)

Cable kit with 25' phono cable for connection from controller to woofer cabinet, and a 3' pat

ch

cord for connecting the controller to your pre-amp. Speaker wire is not included.

Please unpack the system carefull

y.

saving t

he

carton and all packaging materials for future use. Remove all

staples used to seal the carton as they can scratch the cabinet.

BASIC INSTALLATION

(Refer to Figure

1)

System Connection: The servo controller is designed to be installed between your pre-amplifier and amplifier
(or between the amp and pre-amp sections of a receiver or integrated amp). Make all connections with the servo

controller unplugged.

1)

Install the includ

ed

3'

patch cord between your pre-amp's output jacks and the servo controller

(use FROM PRE AMP jacks).

2) Install a second patch cord between the servo controller (use TO POWER AMP jacks) and your
amplifier's input

Jacks.

- 1-

3)

Install speaker cable between the terminals on the back

of

the servo controller and the terminals

on the bottom of the woofer cabinet. Be certain th

at

the connectors are red to red and black

to

black. Any heavy guage speaker wire may be used.
Caution:

The speaker leads from the controller to the subwooler must be installed from red to red

and from black to

black terminals. Reverse connections will cause full

power

oscillation

and

may

damage the woofer.

Poor connections , loose strands, or frayed wi

re

can cause a dangerous short

circuit. We recommend

crimp·on spade lugs for positive connection.

The amplifier section

of

the controller generates some heat. Please maintain adequate

ventilation.

The power cord should be routed

in

such a way that

it

will not be walked on, pinched, or

compressed.

4)

Install the supplied 25' phono cable between the SERVO INTERFACE jack on the servo
controller and the single jack on the bottom of the woofer cabinet.

If

the length of this cable

is

inconvenient, you may replace it with any standa

rd

shielded phono cable.

SATELLITE SPEAKERS

PRE-AMP

SOURCE INPUTS

PRE'AMP

OUTPUTS

0000
0000

POWER AMP

POWER

AMP

INPUTS

R L

+ - - +

R l

RIGHT

LEFT

. -

. -

19

I

FROM

TO

POWE

PRE·AMP

AMP

FUSES

SERVO

~

,

0

INTER·

ow

ow

FUSE

FACE

I

e"

l

--Dc).

0000

I

~:o

l

c;;

ULD-15/18 SERI

ES

II

POWER SERVO CONTROLLER

L

--=t

+====

=--====-J:~

~~=!~

-

ll-

J

117 VAC

50160

HZ

25' SHIELDED

:---l

PHONO CABLE

Figure

1:

Basic Installation

-2-

7 AMPS MAX

?-

SPEAKER

~LEADS

CAUTION:

CONNECT SPEAKER
LEADS

RED

TO

REO

.

BLACK

TO

BLACK

I~

[-i-,

\

-"-

UNDERSIDE OF
ULD -15/18 CABINET

•

•

Cabinet Placement : Your ULD subwooler operates primarily
tionality of these frequencies.
speakers. Not
depending
a corner.

Due

trom any television or other magnet-sensitive device such as a computer disk drive .

e.

however. that frequency response and outp

on

the acoustic variables

to

the strength of the magnet in the ULD driver it is recommended that the un

it

is not necessary

of

the room. Typically. the subwoofer will sound louder next to a wall or

to

place the subwoofer equidistant from each of the satellite

at

Irequencies below

ut

level can be greatly influenced by placement.

8S

Hz. Due to the nondirec-

it

be placed at least 4 teet

in

Adjusting
balance the overall outpu
mum. Play sever
and highs to your satisfaction.

;

next to the subwooter while making the adjustments.

Once you set the subwoofer level. the proportion of bass to midrange and treble outpul will remain conslant.

The
Crossover

filte

rs

dealer at a nominal charge. we feel that the facto
Ins

tallation
offers an accessory unit which includes a 6 dB per octave crossover as well as a subw
bypass function allows you to play your main speake rs full range without the subwoofe
co nnect your ULD-15/18 with the Crossover/Bypas

Conta

80-1

PRE-AMP

SOURCE INPUTS PRE ·AMP OUTPUTS

Level Co

Velodyne controller may be used to tine tune the bass output if desired.

Modification

are set for

of

ct

your Veladyne dealer for additional information

10FIN

).

0000
000

0

ntrol

: Once you have selected the proper location tor your ULD subwooter you will want to

t at your system. We recommend that you begin with the subwoofer level set

al selections

: Your ULD subwoofer has

8S

Hz and feature 12

Crossover/Byp

A

);,

'-S..~

of

music and bring the subwooter level up until the bass output matches the mids

You will

ass

notice that this takes some experimentation, especially

an

active crossover network. Both the high and low pass

dB

Option

POWER

slopes. Whi

: For audiophiles who prefer a passive high pass crossover, Velodyne

POWER

le either crossover point

ry

preset is the optimum crossover for most applications.

s.

reg

arding this accessory (Velodyne part numbe r

AMP

AMP INPUTS

R L

, ,

it

you are standing

may

be raised or lowered by your

ooter bypass switch. The
r.

Figure 2 shows how to

to

mini-

CROSSOV

POWER SERVO CONTROLLER

ER

/

B

~

RL

FROM

fORE·AMP 10

EXTERNAL

ELE

!'OWER AMP

II

FROM

PRE

ULD-

POWER SERVO CONTROLLER

Figure

TO POWE

AM AM

15/

2:

18

SERIES

P

FUSES

0000

II

Connection using

Crossover / Bypass Accessory

SERVO
INTER­FACE

I

~

)

tic!

~

~

0 117

"" ""

t+=

FUSE 50 I

SPEAKER LEADS RED

_

"_'D

_' _ _ _ '_"'_

25' SHIELDED
PHONOCABLE

_I }

l

VAC

GO

HZ

7 AMPS MAX

CAUTION:

CONNECT SPEAKER

CI<

TO

f -

TO

BLACK

TO

SATELLITE SPEAKERS

(AS

IN

FIG 1)

RED.

--t

--==

IQ)

UNDERSIDE OF
ULD·15/

1S

CABINET

-

3-