ACI Opal Owners manual

Opal

Contents:

Guarantee/Warranty …2
Specifications …4
Hookup …4
Using Your Opals …5
Video Applications …5
Avoiding Damage …6
Positioning the Opals …7
Speaker Break-In …9
Design Philosophy …9
Troubleshooting …11
Warranty Registration …13

Owner’s Manual

Audio Concepts, Inc.

901 South 4th Street, La Crosse, WI 54601 Phone:[phone] Fax:[phone]

Website: www.audioc.com Email: [e-mail]

All Rights Reserved 2001

Sound that Satisfies…

Audio Concepts, Inc.

Our Guarantee and Warranty

Satisfaction Guaranteed:

We’re sure you’re going to love your new Audio Concepts, Inc. (ACI)
products! In the unlikely event that you are not satisfied, please contact us
within 30 days of receipt of your ACI products for a hassle-free return.

1. Return Authorization: Call us at [phone] or email [e-mail], within 30 days of

receipt of your ACI products for a return authorization number. Clearly mark the return authorization
number on the outside of the box. Include a brief note stating your name, address and daytime
telephone number, along with a short description why the products are being returned.

2. Returning: We request that you return the ACI products to us in their original packaging and

include packaging materials, manuals, etc. Ship by the most economical means (preferably UPS)
and insure the products for the invoice purchase price. The customer is responsible for return
shipping. Please note: ACI does not accept C.O.D. returns.

Credit: Upon receipt and inspection, we will issue a refund for the invoice purchase price and

3.

invoiced UPS Ground service only. Please note this return policy is in effect only if the ACI products
are in new condition, in their original packaging, without drilled holes, disassembled or any other
modifications.

2

Speaker Manufacture’s Warranty:

For five years from receipt, Audio Concepts, Inc. will, at its option, repair or
replace factory defective components. This warranty does not apply to products that
have been abused, modified, or disassembled in any way. This warranty does not
apply to products, which have been damaged in shipping. Audio Concepts, Inc. liability
is limited only to the replacement of defective parts. No other liabilities or obligations
are written or implied.

Return Authorization: Call us at [phone] or email [e-mail] for a return

1.

authorization number. Clearly mark the return authorization number on the outside of the box.
Include a brief note stating your name, address and daytime telephone number, along with a short
description why the products are being returned.
Returning: Carefully repack defective ACI merchandise. Ship by the most economical means

2.

(preferably UPS) and insure the products. The customer is responsible for return shipping.

Please note: ACI does not accept C.O.D. returns.

Replacement: Audio Concepts, Inc. will inspect and determine the cause of failure and will pay

3.

return shipping on the defective goods replaced or repaired.

The above stated guarantee and warranty applies only to assembled speaker

models purchased directly from Audio Concepts, Inc. A different warranty and
guarantee applies to purchasers of parts kits and DIY components.

Please ship any returns to the following address:

Audio Concepts, Inc., 901 So. 4th Street, La Crosse, WI 54601 [phone]

IMPORTANT NOTICE

All new speakers require a minimum of 60 hours break-in-time before
they sound the way they are supposed to. A speaker's performance improves
significantly once broken in. It is critical that you have at least 60 hours on your
speakers before you evaluate them. Don't worry if your speakers do not sound perfect
the first time you play them. This is normal until they are broken in. If you are having
difficulty getting enough hours on your speakers and your 30 day return privilege is
getting near, call us. We will work with you. Please give us the courtesy of breaking
the speakers in before you determine they don't sound right.

Many of our customers break their speakers in by:

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A) Leaving them on at moderate listening levels when they are not home.
B) Leaving them on at moderate listening levels while they sleep.
C) Running pink noise through them.

These methods are not convenient for everyone and we understand this. But
please know that you are not giving yourself, your speakers or us a fair chance if you
do not break them in before critical evaluation.

THANK YOU!

The Opal

Thank you for your order and congratulations on becoming the owner of an Audio
Concepts, Inc. (ACI) speaker system. These fine speakers will provide you with many years of
listening pleasure!

Please take the time to read this manual. We’ve tried to provide you with the
information you’ll need to gain the most enjoyment from your speakers. Should you have
questions about the use of your speakers, not answered in the manual, please E-Mail or call.
We guarantee your satisfaction with the finished product. (Please see warranty sheet for
details.)

Specifications:

Frequency response: 48-20kHz +3db anechoic, (actual useable in-room bass response will

extend cleanly to 30-35Hz)

Nominal impedance: 8 ohms, minimum impedance 7 ohms
Sensitivity: 88.5db 1 watt/1 meter
Bass-loading: Aperiodic Bessel alignment
Recommended RMS Power: 30 to 200 watts per channel
Tweeter: 1” Silk-fabric dome with ferro-fluid
Bass-mid: 8” coated pulp cone with rubber surround and vented low-distortion motor design
Cabinet: Full ¾” medium density construction with internal bracing, clear lacquer on American

oak, black oak or cherry

Inputs: Gold plated, heavy-duty, five-way binding posts
Dimensions: 38-1/8” tall, 10-1/8” wide, 13-1/4” deep
Recommended accessories: “Extra Points” (included).

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Hookup

Your Opals are furnished with five-way type binding posts. You may choose to utilize
spade lugs, banana jacks, pins, or bare wire. It is important that the positive and negative
leads do not touch. If you use bare leads, be sure to twist them tightly and insert through holes
in such a manner that they do not fray or short out against each other. Good connections are
important, so make sure any ends are tightly crimped and preferably soldered to the wire
ends. Speaker wires should be kept as short as possible, (long wires add excessive
resistance and color the sound.) The use of quality wire is recommended. ACI stocks and
recommends the Silver Sonics from DH-Labs.

Make sure you hookup the speakers in the correct polarity. The red (positive) terminal
on your amp should hook up to the red binding post, and the black terminal should be
connected to the black binding post. Keep this the same for both speakers in a stereo pair. A
way to check the correct polarity is to play music with a lot of bass. The correct hookup will
yield the greatest amount of bass.

The Opal crossovers are designed to allow two pairs of binding posts per speaker for
bi-wiring. Bi-wiring requires two pairs of speaker cables. From the factory the posts are
connected with a jumper to enable conventional hookup. To bi-wire, remove the jumpers and
use a bi-wire cable or two speaker cables to hook each set of posts to your amplifier. The
upper posts are for the tweeter and the lower posts are for the bass-midrange driver.

Speaker Grills

Your Opals are supplied with cloth covered grills which enhance the appearance of
your speakers and provide some protection for the drive units. The inside edges of the grills
are shaped to reduce unwanted high-frequency reflections. We recommend leaving the grills
in place except for critical listening when you may want to remove the grills.

Using Your Speakers

If the rest of your system does not work properly or is not correctly connected, you will
not get the best performance from your system. To eliminate problems we recommend the
following:

1) Use the finest associated components you can afford. All CDs, DVD and Laserdisc
players, HiFi VHS tape player, turntables, cartridges, pre-amps, amplifiers, (receivers)
have impact on the sound of your system. Poor speaker wires or interconnects can
flaw the sound of an otherwise good system. Your Opals are accurate speakers and let
more detail through. You will hear more of the beauty of the music, but flaws in your
system and or source material may also be more obvious. Any good audio system is
made up of matched components. You wouldn’t use bargain recap tires on a new
Porsche, and you shouldn’t use inferior components with a high quality speaker. Your
Opals perform like speakers costing two to four times their price. Keep this in mind
when selecting the rest of your system. Your Opals will work in systems with as little as
20 watts per channel. But for optimum sound we recommend high-quality amplification
of 30-200 watts per channel.

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2) Know your source material. People often blame their audio gear for poor recordings. A
great number of popular recordings are of inferior sound quality. Unfortunately this
applies to records, tapes, DVDs and CDs. Frequently poor recordings are rolled off in
the low bass, and harsh and constricted in the mids and highs. Good stereo image is
rare. Some recordings are still done on monitor speakers that are grossly inaccurate.
Consider that some producers still mix recordings to sound best on cheap table and
card radios! This doesn’t mean you can’t enjoy these recordings, but you should try a
few of the better recordings from labels such as Opus3, Proprius, Reference
Recordings, Telarc, Audioquest, DMP, Chesky, Dorian, Analog Productions, etc. just to
see how terrific your system can be with well recorded music.

3) Work at getting the best placement of your speakers in their environment. It is not
unusual to be able to get a 25 to 50 percent improvement in sound by careful
placement of speakers and furniture. It may not be practical to go all out, but the more
you can “tune” your room, the better your system will sound. Refer to the section on
placement and room treatment.

Specific Applications Including Video and Use with Subwoofers

Besides being excellent speakers for musical reproduction, the Opals are suitable for

the highest quality video applications. The Opals make excellent right and left main speakers
in high-quality home theaters. The bass response is far superior in accuracy, detail and impact
to most mini-satellite-subwoofer systems.

For the ultimate in extension and “room shaking” response high quality powered

subwoofers may be added to your system. Low quality powered subwoofers may add some
bass quantity but the quality will be lacking. Many low quality subs will actually go no lower in

frequency than your Opals. Instead, they will overlap the same bass frequencies causing
response irregularities. With a poor subwoofer, the system will sound like it has more bass.
However, it will be muddy and lacking in clarity and impact. High quality powered subwoofers
such and the ACI Titan, Titan II or Quake will add power and reach while enhancing clarity and
openness.

Avoiding Damage

ACI speakers are designed for the purpose of accurate reproduction of music in the

home. We do our best to make our speakers rugged and reliable. However, ANY speaker or
system may be damaged under certain conditions:

-Excessive power, particularly at certain frequencies or for prolonged periods of time

-Excessive distortion often caused by under-powered amplifiers or receivers

-Defective amplification

-Excessive subsonic energy
Our systems are tested at high volume levels with a variety of amplifiers and receivers

before a design is approved. With many years of testing, we know it is virtually impossible to
damage a component without the system first giving audible warning in the form of distortion.
We also know that true factory defects are extremely rare, less than one in 10,000 drivers.
Here are some considerations to keep in mind to avoid damaging your drivers:
 Even though a system may be rated for 100 watts or more it is possible to damage it with a

low power receiver. When an amplifier runs out of power, it “clips”. This clipping produces
large amounts of distortion which sends excessive energy particularly to the midrange and
tweeter. This clipping distortion accounts for more than 75% of all tweeter failures. How do
you know if the amplifier is clipping? Volume knob placement does NOT indicate much.
Some receivers reach full output well before 12:00 on the dial. Use of the loudness button,
bass boost and treble boost can all drive the receiver and then the speaker into distortion
at fairly low levels.

 Many of today’s recordings including CDs and DVDs contain extremely powerful low bass.

This low bass can easily drive woofers into over-excursion or cause the amplifier to run out
of power and clip, causing tweeter or midrange damage.

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You can protect your speakers by following a couple of very simple guidelines:

-Distortion is a warning sign that should not be ignored, if it sounds at all distorted, turn it

down.

-Be careful not to over-boost frequencies with tone controls or equalizers. IF you must boost

certain frequencies keep the boost level low and monitor the system carefully.

-Beware of the "party damage epidemic". Speakers are more often damaged during parties.

All those bodies soak up sound, requiring more output to sound as loud, bass and treble
controls are sometimes cracked up and nobody is listening for distortion.

-Watch out for energy put out by the amplifier in the range below 20Hz which is not music.

Examples include record warps, DC current and subsonic noise in the recording.
These signals can take up a lot of amplifier power which means the amplifier runs out of steam
very early. These signals can also overload a speaker even though you can’t hear them. If you
have ever watched a cone “flap” you know just what we mean. Unusually powerful low organ
or synthesizer notes may cause an otherwise excellent woofer to bottom out at relatively low
input levels.

-Keep an eye out for excessive cone movement that is not producing music. Find the source of

the problem and eliminate it, play at low levels, or use a subsonic filter (usually in your pre­amp) which will filter out energy below 20Hz. However, use of a subsonic filter may take away
from the naturalness of bass sounds. We don’t recommend it for extremely critical listening.

In more than 24 years of daily evaluation of all types of speakers on everything from

10 to 1000 watts with all kinds of music, we have rarely damaged a driver without first hearing
audible distortion. If it sounds bad, turn it down and you will never damage a speaker.

Cabinet Finishes

Your Opals feature a lacquered clear coat that is extremely durable. To keep it clean

you may periodically wipe off using a clean soft cloth and any good quality furniture polish. DO
NOT use wax. Wax will tend to dull the finish. If the finish should become stained with grease
or dirt these may be removed by using a non-abrasive household cleanser such as Formula

409.

Placing the Speakers in Your Room

The proper placement of speakers in your room will easily improve the sound. Because

everyone’s rooms and tastes are different, it is impossible to specify a “correct” placement in
this manual. Reading the following information may help you determine the best placement in
your room.

It helps to visualize sound waves as behaving very much like water waves. The sound

we hear is made up of two types of waves. Direct sound waves come right from the speaker
and are not changed in any way. Reflected waves come to us after bouncing (diffracting) off
the walls, ceiling, floor, furniture or the speaker enclosure itself. If you want to see how much
these reflected waves affect the sound, move your speakers outside and hear the difference.

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Sound waves come in different lengths; the lower the note, the longer the wave.

Extreme low frequencies such as the lowest organ pedal notes are over 60 feet long! A
problem with bass notes is the phenomenon we call standing waves. In effect, the waves more
or less “pile up”. This creates big peaks and dips in the bass response. If you put a certain
frequency through the speakers, you can usually walk around the room and find places where
it is very loud, and places where you perceive virtually nothing.

The construction of your listening room also has a major effect on bass reproduction.

Sheet rock and wood frame construction “leak” low bass notes much more than block or
concrete construction. Rooms with solid construction “hold” the bass in, providing deeper and
more powerful bass response in the room.

Just as the room affects the bass response, so it affects the mid-treble sound of the

system. In the mid-treble range, the sound waves are shorter and have peaks and dips. Most
of the affects (peaks and dips), occur from enclosure edges, furniture, walls, or the floor. The
Opals exhibit the deepest image when placed away from walls and furniture. The shorter
wavelengths of the mids and highs are more easily absorbed than the longer wavelengths of
low frequencies. This is why a bare room sounds so harsh compared to a room with a lot of
stuffed furniture, carpets, drapes, etc.

An ideal setup for sound would be achieved if you could:

• Choose a room with width, height and length dimensions that are not multiples of each

other. (A cube would be the worst!) Good numbers might be something like, height = 8
feet, width = 15 feet, and length = 26 feet.

• Choose a room that has an irregular shape, non-parallel walls cut down on standing

waves.

• Place the speakers so that the woofer cones are at irregular distances to the floor, walls

and ceiling. This can be difficult. Use a tape to measure the distance from the center of the

woofer to the room boundaries. Move the woofers around till you have cut down on the
number of related distances. (You don’t want distances like 12 and 24”, but more like 12
and 22”).

• Use the distance from the woofer to the boundaries to increase or decrease bass output.

Sticking the speaker in the corner or close to walls will give more bass output than putting
the speaker out into the room. You can use this to get the best balance between bass
output and upper range output. In most rooms we find the best overall sound of the Opal is
with the backs of the speakers 18”-30” from the wall. (If having the Opals out into the room

places them “in the way, leave them back, out of the way most of the time and pull them
out when you settle down for some critical listening).

• Use absorbent materials to help smooth upper-range response and improve transient

response and clarity. Why? Let’s take the sound of a bell for example. First you will hear
the direct sound from the speaker. But some of that sound bounces from wall-to-wall,
ceiling-to-floor, off furniture, etc. before it reaches your ears milliseconds later. Because
the time difference is short, you don’t hear an echo, but the sound of the bell is stretched
out from something like a “ding” to a “ddiii-nngg”. It appears that some of the best speaker
engineers have begun to realize this and are addressing the problem in their latest
designs. This is why we are now seeing very directional designs. This controlled
directionality increases the amount of direct sound in proportion to reflected sound.

• Place speakers as far as possible from other furniture and room boundaries. Keeping the

mids and tweeters away from the floor is particularly important. This is one of the reasons
we have the tweeter and woofer mounted near the top of the cabinet.

• Use padded furniture and drapery when possible to cut down on reflections. Furniture has

the added bonus of helping to break up standing wave patterns in the bass.

• Use symmetrical placement of the speakers in the room. Of course the distance between

the speakers is also important. In general, the further back your listening position, the
farther apart should be your speakers.

• In most rooms, you will want the Opals between five and eight feet apart. Experiment! Too

much distance will smear the image and it will seem like there is a hole in the middle. Too
small a distance will compress the image. Experiment with facing the speakers straight into
the room or toed in slightly toward the listener.

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Left – Right Speaker Placement

Your Opals are constructed in mirror-imaged pairs. The tweeters are mounted toward

the inside edge of the speaker fronts. Best stereo imaging and smoothest response will be
attained with the speakers placed so the tweeters are mounted to the inside.

Speakers as viewed from your listening position:

Use of “Extra Points”

Optional “Extra Points”, which are included, are easily installed on your Opals. The

“Extra Points” will make the speaker more stable, particularly on carpeted floors, and provide a
cost-effective way of coupling your speakers to the floor. Floor coupling is universally regarded
as a fine means of mass-loading the speaker to improve detail, imaging and clarity.

Speaker Break-In ****Important!!!

Allow at least 60 hours of playing time before your new Opal speakers will sound their

best. The adhesives and materials used in manufacturing must stretch and flex properly before
a speaker will sound its best. After break-in the bass will be tighter and go lower, imaging and
transparency will improve and the midrange and highs will sound smoother and more natural.

About the Design of the Opal

At Audio Concepts, Inc. we define value as “the best sound performance housed in

attractive design built to standard that insure durability.” Good speaker design requires the
optimization of the drivers, the crossover and the cabinet. Like all Audio Concepts designs,
the Opal is a unified system offering the best value. Audio Concepts designers spend
thousands of hours each year on sophisticated computer modeling programs investigating
speaker design ideas. A handful of the most promising concepts are built into prototype forms.
Eventually, after many hours of listening, testing and tweaking a few truly top notch designs
evolve.

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Following are notes from the chief designer of the Opal. They are not meant to fully

describe every aspect or design choice made but rather give a general feel for how the Opal
was conceived, designed and is produced. Trying to guess at the sound of a pair of Opals by
reading the following would be like formulating an opinion about a 500 page novel on the basis
of the two-page introduction…there is so much more. We publish the following to give you an
idea…you must listen to music on the Opals to hear.

Bass Design of the Opal

We spent several months trying to decide between a ported box with a 6-1/2” woofer or

an 8” woofer in a sealed box, (with pressure release). The smaller woofer would have offered
some slight advantages in the midrange. However, to get the kind of bass response desired
would have required a vented speaker system for the smaller woofer. Vented systems offer
the advantages of greater extension and output down to the cutoff frequency. But below the
cutoff frequency the output of a vented box drops more quickly than a sealed box. With the
same 48Hz – 3 db frequency the sealed box has about twice the output at 30Hz as a vented
system! The vented system also can have inferior transient behavior with much worse group
delay than the sealed system. Unless everything is just perfect with a vented system it will lack
pace, (that hard to define listening quality that translates into; “I must tap my feet”).

Below its resonant frequency, a sealed box gets increasingly resistive to the motion of

the woofer. The “air spring” in the box helps keep the woofer from trying to move further than it
safely can with extreme low frequencies. (A bit of reliability protection against the dreaded
cracking noise of a woofer voice coil pounding against its stops). Vented Boxes have no “air
spring” below their resonant frequency. The designer has a choice: use a stiff suspension
woofer that will protect itself but have a fairly high cutoff frequency, or use a driver that will give

a lower frequency cutoff but that may generate excessive distortion or even be destroyed by
very low frequency signals.

In the Opal we have designed a relatively low Q system, (<.75) to optimize transient

response. The enclosure size and damping material are perfect for smooth, extended bass
response.

Drivers Used in the Opal

The 8” bass-midrange used in the Opal utilizes a coated pulp cone with rubber

surround for excellent midrange performance and long life. This cast-frame driver has the long
throw necessary for low distortion, high power handling and punchy bass performance. The
parameters of the driver were optimized for the low Q aperiodic design of the Opal. The pole­piece is vented to relieve backpressure from behind the dust cap and reduce distortion.

The Opal uses a silk-fabric dome, ferro-fluid cooled tweeter. This tweeter features

exceptionally smooth, extended frequency response, well controlled transient behavior and is
built to superior quality control standards. The long-throw suspension of this tweeter makes it
suitable for the 2.3kHz crossover frequency of the Opal.

The Opal Crossover

The crossovers for your Opal have been carefully designed and tested for optimum

performance with the specified drivers and cabinets. Impedance, on-axis, spatial average, and
room response curved of the drivers mounted in the cabinets were taken with the MLSSA
acquisition system and ported into LEAP 4.12 software.

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It is important to note that averaged room responses were taken into account in the

design of the woofer crossover. Had we designed the crossover based only on the one meter
anechoic response of the system, (most crossovers are designed this way), the actual bass­midrange balance would have been far less than optimum. Countless crossover circuits and
variations were modeled in LEAP before settling on a handful of promising crossover
candidates.

Prototypes of the most promising crossovers were built. Exhaustive testing, listening

and tweaking resulted in the development of an asymmetric crossover centered at
approximately 2.3kHz.

All coils are rated at 500 watts to eliminate distortion and saturation effects common to

many coils. The capacitors are polyester, (film) for best sound and long term reliability.
Resistors are a low-inductance type with sufficient wattage for high power use. Components
are matched to tighter than 1% tolerances in stereo pairs for best left-right balance and stereo
imaging. High purity silver coated multi-stranded cable is used throughout the system.
Crossovers are assembled using direct wiring techniques because this insures the lowest
contact resistance, long-term reliability and the best sound.

The Opal Cabinet

The Opal cabinet is built of full ¾” medium density fiberboard with internal bracing.

Several years ago we spent a considerable amount of time doing accelerometer testing of
dozens of cabinet materials. Eventually we settled on a board with a density of approximately
50 pounds per cubic foot. This cabinet material performs far better than the 30-42 pound per
cubic foot densities commonly used for speakers. Three large donut braces around the inside
of the cabinet act to lock the sides, front and rear together and further suppress resonant
effect. You’ll notice the cabinet quality of the Opal the first time you lift one. At 54 pounds, the
Opal is a solid, non-resonant and durable speaker.

The top, sides and front are covered in either A grade American oak veneer or cherry

veneer. The oak is sprayed with black or clear lacquer and the cherry is sprayed with multiple
coats of clear lacquer. This finish is superior to common lacquer finishes for three reasons:

1) The finish brings out the texture and beauty of the wood.

2) This lacquer is extremely durable, far more scratch and abrasion resistant than

other finishes.

3) Spraying this lacquer finish with our advanced pressure system releases far fewer

toxins than other spray finishes. Like the other components used in the Opals the
cabinets are built for many years of trouble-free enjoyment.

The inside of the Opal is damped with a roll of fibrous material and precisely placed

acoustic foam pads. This internal damping absorbs much of the back-wave energy of the
bass-mid driver rather than letting it reflect back through the cone. The optimum damping
materials result in much better bass response and greatly improved midrange clarity and
smoothness.

We’ve attempted to show you some of the important design considerations that go into

the Opal. To fully document the design process would required many hundreds of pages. The
most important point is that the Opals were designed by and for music lovers. You must see
the fine cabinet work and hear the Opals reproduce your favorite music over a period of time
to appreciate how fine these speakers are.

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Troubleshooting

Occasionally we get a call from someone who feels there is a problem with their ACI

speaker. At least a couple of times a year we will get a call or letter that goes something like
this: “Speaker not working properly, can’t get enough sound even with the volume turned way
up.” The problem may be different, but with this little information to go on it is almost
impossible to trouble shoot the problem “long distance”.

The following checklist may help:

1) Are all system hookups properly connected, not partial shorted wires, or reversed

connections, etc?

2) Did you try the rest of your system with other speakers to determine if the problem

exists with the speakers?

3) Please be realistic in your expectations. Our speakers offer excellent value but we

can’t beat the laws of physics. For instance, a medium sized speaker such as the
Opal sounds excellent but will not play as loudly as a very large speaker.

IF for any reason you aren’t satisfied with the sound you’re getting from your speakers we
want to know about it. Make sure the speakers have had adequate break-in time. Before you
call, write or email please try to narrow down the problem and eliminate other factors. If you
contact us we will need to know:

• The size of your room

• Where you have the speakers placed

• What other equipment is in your system

• Have you tried other speakers (which ones, and did they eliminate the problem)

• Any other specific symptoms or information you can provide

Our Customers are #1 with us, and we want you to be completely happy with your ACI
speakers!

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The Company

Audio Concepts, Inc. (ACI), has been satisfying discerning music lovers since 1977.

Our goal has and always will be to provide exceptional product and service to music
enthusiasts around the world. Audio Concepts speakers are an expression of dedication to our
customers and their desire for accurate musical reproduction. We believe you must audition
speakers in your own home and in your own system. Please see the warranty statement for
details.

After listening, please fill out and return the warranty registration. This warranty

registration is important. It allows us to reach you in the event of future upgrades. The
comments you make on the warranty help us to continually improve our products and
customer service. Thank you!

Specifications and design are subject to change without notice due to our continuous

research and development program.

Handcrafted with pride in the U.S.A.

Audio Concepts, Inc.

901 South 4th Street
La Crosse, WI 54601
Phone: [phone] Fax: [phone]
E-Mail: [e-mail] URL: www.audioc.com

All rights reserved Audio Concepts, Inc. 2001

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Warranty Registration, Please Return

ACI div. Audio Concepts, Inc.

901 S. 4th Street, La Crosse, WI 54601

[e-mail] [phone]

Congratulations on becoming an ACI speaker owner. Completing this registration enables us to contact

you regarding future upgrades. Your information helps us provide the best possible products and

service. If you need additional room please continue on the back. You may also register your product

electronically at our web site. http://www.audioc.com

Name:______________________________________________________________________________________

Address: ____________________________________________________________________________________

Main reasons you purchased from ACI:____________________________________________________________
____________________________________________________________________________________________

Where did you first hear about ACI:_______________________________________________________________

System(s) purchased:__________________________________________________________________________

Date received:_____________________________ Invoice Number:_____________________________________

Condition received in:__________________________________________________________________________

Comments or suggestions regarding our staff or service:_______________________________________________

Other audio equipment used: ____________________________________________________________________
____________________________________________________________________________________________

Do you have a home-theater system? ______________________________________________________________

Do you plan to purchase other speakers within the next two years?______ If so, what types of speakers are you
interested in purchasing, (Tower speakers, satellite speakers, subwoofers, wall speakers, outdoor speakers, home­theater speakers, etc.)
____________________________________________________________________________________________

All speakers require at least 60-80 hours of playing time to sound their best. After your speakers have had time
to break-in and you've done some serious listening please tell us:

Features you like most about your ACI speakers: ____________________________________________________
____________________________________________________________________________________________

Areas of performance or appearance you'd like to change: _____________________________________________
____________________________________________________________________________________________

Other comments or suggestions:__________________________________________________________________
____________________________________________________________________________________________

Will you recommend us to others?_________ (Over 1/2 of our customers were recommended to us by testimonials
on computer data bases or referrals from someone they know. We put the money we save on advertising into the
highest quality products at the lowest possible cost to you.)
We would appreciate being able to use your comments in future advertising. Please sign here to allow us that
privilege.

Name:_________________________________________ Date: ___________________

Thank you for taking the time to complete and return this registration!