Maestro XL
The Maestro XL
Powered Subwoofer
Owner's Manual
Audio Concepts, Inc.
901 So. 4th Street
La Crosse, WI 54601
Phone: (608) 784-4570 Fax: (608) 784-6367
URL: http://www.audioc.com Email: service@audioc.com
All Right Reserved 2006
Sound that Satisfies…Since 1977
Contents:
Guarantee/Warranty …2
Specifications …4
Setup …4
Placement …7
Hookup: HT …8
Hookup: Stereo …10
Other System Considerations …12
Avoiding Damage …13
Troubleshooting …13
Warranty Registration …15
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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.
Simply follow these procedures:
1. Return Authorization: Call us at (608) 784-4570 or email service@audioc.com, within 30 days of receipt of your ACI
products for a return authorization number. Boldly 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 can not accept C.O.D. returns.
3. Credit: Upon receipt and inspection, we will issue a refund for the invoice purchase price and 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.
Speaker Manufacture’s Warranty:
ACI’s Five Year Standard Warranty and One Year Total Assurance Guarantee
For five years from receipt, Audio Concepts, Inc. will, at its option, repair or replace factory defective
components. This warranty excludes 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 expressed or implied.
For the first year of ownership, ACI also provides a unique Total Assurance Guarantee, (TAG). TAG
from ACI not only covers everything included in our standard five year warranty, but we will also pay for
shipping to ACI and back to your front door. TAG is limited to shipping destinations in the Continental
U.S.
The ACI Five Year Standard Warranty and One Year Total Assurance Guarantee are fully transferable
from the original owner to a secondary owner provided that the original owner notifies ACI, by phone
call or by filling out the on-line form: www.audioc.com/order/warranty_transfer.htm
No warranty will be transferred absent this notification.
Simply follow these procedures:
1. Return Authorization: Call us at (608) 784-4570 or email service@audioc.com for a return authorization number. If the
warranty repair is during the first year of ownership, additional instructions will be given to you at that time. Boldly mark
the return authorization number on the outside of the box. Include a brief note with your name, address and a daytime
telephone number, along with a short description why the products are being returned.
2. Returning: Carefully repack defective ACI merchandise in their original packaging. Ship by the most economical means
(preferably UPS) and insure the products for their full retail value. The customer is responsible for return shipping (unless
the first year TAG applies). Please note: ACI can not accept COD or Freight Collect returns.
3. Replacement: Audio Concepts, Inc. will inspect and determine the cause of failure and will pay return shipping on the
defective goods replaced or repaired.
Please ship any returns to the following address:
Audio Concepts, Inc., 901 So. 4
th
Street, La Crosse, WI 54601 (608) 784-4570
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IMPORTANT NOTICE
All new speakers require a minimum of 60 hours break-in-time before they begin to
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:
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 Maestro XL is very heavy. We strongly recommend having two
people available to remove from packaging.
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The Maestro XL Powered Subwoofer
Thank you for your order and congratulations on becoming the owner of an ACI speaker system. The
Maestro XL powered subwoofer(s) will provide you with many years of listening pleasure!
ACI’s Maestro XL is an extremely powerful subwoofer. Although relatively large, a conventional
subwoofer of equal performance would have to be twice the size! The Maestro XL is based on the subwoofer
technology of our legendary Titan series. An extreme excursion 15" driver is powered by our proprietary
amplification using special circuitry to essentially cut the required box volume in half.
Many subwoofers do a respectable job with explosions, shotguns, and crashes. The market is loaded with
black boxes and tubes that beg to be "hidden". The Maestro XL is different . Reasonably sized and attractively
built to compliment your fine furniture. A number of fine wood finish choices are available. The Maestro XL goes
way loud, and it goes way deep. Warning: ACI is not responsible for any tickets you may receive for noise
violations or domestic disturbance! More importantly, it will allow a seamless and completely transparent blend
with your main speakers. Your sound stage will be enhanced, not degraded. Instruments like acoustic and electric
bass, piano, and percussion will come through with vivid realism. The Titan and Force have earned a reputation
of being some of the most musical subs available at any price. The Maestro XL continues this tradition of musical
excellence in an extreme output configuration.
The internal enclosure is constructed of 1” non-resonant high-density fiberboard with extensive internal
bracing. The mounting for the down-firing woofer is 2" thick for additional resonance control and stability. Satin
black durable finish, cherry veneer, or piano gloss black available.
Many subwoofers add unacceptable colorations and actually degrade the performance of otherwise fine
speakers. The Maestro XL is adaptable for use with virtually any satellite, electrostatic or ribbon speaker. If you
are satisfied with your present speakers but just want more bass power and extension, the Maestro XL(s) may be
the perfect answer. If you own speakers from manufacturers such as B&W, KEF, Aerial, Quad, Thiel,
Magnaplaner, Revel, Thiel, Martin Logan, Wilson, etc., you’ll find your listening pleasure greatly enhanced with
the Maestro XL subwoofers.
Specifications
Frequency Response: 19-120Hz, +3db, system Q <.6
Crossover: Adjustable Low-Pass: 35-250 24db/octave
Sensitivity: Adjustable
Dimensions: 21 3/4” tall, 21 3/4” wide and 21 3/4” deep
Weight: Sub 112 lbs, Amp 24 lbs
Amplifier Dimensions: Fits standard 19” Rack Mount, Width: 17 ¼” w/o brackets, 19” with
brackets, Height: 3 3/8”, Depth: 18 3/8”
Special Circuitry: Protection Circuitry, Woofer Behavior Control
Woofer: (downward firing) Proprietary 15”, cast–frame, ultra long throw woofer
Rec. RMS Power: Separate rack-mountable amp delivers 500 watts RMS < .5% THD distortion.
Maestro XL Subwoofer Setup
Integrating a sub is a process that requires following ordered steps. You’ll find it easy in some
rooms/systems, and very time consuming in others. The key is to eliminate each variable one at a time. We
include a setup disc, free with purchase of our subs. Use of the setup CD is optional. Please refer to the attached
directions for the test CD.
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The front panel controls of the Maestro XL perform the following functions:
Faceplate: The Maestro XL amplifier is shipped with a cosmetic faceplate installed. This faceplate needs to be
removed to make the setup adjustments. An allen wrench is supplied to remove the four bolts that hold the
faceplate in place. Once setup is completed you may re-install the faceplate for a finished appearance and to
keep un-authorized fingers from upsetting your adjustments. The amplifier is also supplied with brackets and
hardware for optional installation into standard 19” racks.
Run / Standby Switch: This push button switch is used to toggle the amps operating mode between Run and
Standby. The Standby mode mutes the outputs and the amp is in idle and virtually no current is drawing from the
AC lines .
Run / Standby Indicator LED: When the BLUE LED on the front panel in ON it indicates the amp is in Run
mode. When the BLUE LED is OFF and the Protect LED is YELLOW, it indicates the amp is in Standby (Mute)
mode.
Power-on / Fault Indicator LED: The GREEN LED indicates normal operation. RED indicates an over-
temperature or fault condition. In the event of RED LED at startup, turn the amp off, unplug the AC cord and
check the output, cable, and speaker itself for a short-circuit condition. In the event of a RED LED during normal
operation, switch the amp to Standby for a few minutes and wait for the GREEN LED to come on, indicating the
amp has cooled off and is ready to resume normal operation.
Level: This controls the volume of the Maestro XL. The volume needs to be set at the same volume as your main
speakers to get a seamless blend.
Lowpass / Crossover Control: Adjusts the frequency response of the Maestro XL. A 24dB/oct Linkwitz-Riley
filter is adjustable from 35Hz to 250Hz.
Phase / Crossover Switch: A four position switch used to change output phase from 0 deg to 180 deg and to
enable or bypass the crossover function.
• Position 1: 0 deg phase shift, lowpass crossover enabled
• Position 2: 0 deg phase shift, lowpass crossover bypassed
• Position 3: 180 deg phase shift, lowpass crossover enabled
• Position 4: 180 deg phase shift, lowpass crossover bypassed
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