CEPro May 2012 Speaker Review by Robert Archer



In-Wall Speakers Fit the Bill

rarcher  By Robert Archer, Senior Editor

NORTH CAROLINA-BASED GTL Sound Labs was founded by Gary T. Little more

than 35 years ago, and since then the company has been producing high quality

loudspeakers for a wide array of applications.


For those not familiar with this small company, GTL primarily focuses on in-wall

and ceiling speakers for home theater, but the company also offers custom-

designed, one-off speakers for unique applications. The company's flag- ship is the

AE963 in-wall speaker, which uses a sealed enclosure that includes an ABS plastic

shell lined with Iambs' wool.  


The speaker mounts through six specially designed Phillips screws that pull the

heavy duty outriggers to the studs for proper mounting in the wall.


Internally the speaker is outfitted with a 9-inch woven carbon fiber woofer, a 5.25-inch

midrange speaker and a 3-inch titanium silk dome tweeter. The 9-inch woofer utilizes

a 2-inch voice coil, 40-ounce vented magnet and butyl rubber surrounds.  The 5.25-

inch midrange unit employs a polypaper cone with a 1 .5-inch voice coil and a 25-

ounce vented magnet. The 3-inch tweeter uses a 1-inch voice coil and a 12.7-ounce



The company states the 8-ohm speaker is 90dB efficient and that it produces a

frequency response of 26Hz to 20kHz.


In this review of the system I opted not to wall mount the speakers so performance

would not be affected being outside of a wall-stud cavity environment (the result of

a sealed enclosure design). Placing the speakers eight feet apart and connecting

them to a run-of-the-mill 5.1 channel Sony receiver I used 16-gauge Monster XP

cables and connected the speakers via their bottom mounted two-way binding

posts, which can accept banana posts and bare wire. To test the speakers as a

stereo pair I used an Apple Mac Mini, which had AAC, Apple Lossless and MP3

files, and a Technics turntable to spin some vinyl.  Listening to a variety of tracks like

"Pannonica" by Thelonious Monk, the Grateful Dead's "Morning Dew" and

Buckethead's "Jordan," I thought the speakers per formed solidly. The AE963s

provided clear and crisp imaging among their highlights. The clarity of the saxophone

in John Coltrane's "I Got It Bad," for instance, really brought out the musicality of the

speakers and the song. In general, everything I played through the AE963s sounded

excellent. The speakers offered more bass and punch than I expected, and their

midrange and top end were coherent to produce a well-rounded listening experience

that would do well in a home theater or whole-house audio setup.


MSRP $2.500 per pair, www.gtlsoundlabs.com


Electronic House Showcase - Jan 2012


Audiophile Floor Sound in an In-Wall

Truly hearing is believing! These award winning speakers will exceed your expectations. The GTL Sound Labs AE 963 in-wall speakers can handle loads from 30-200 watts, and has a frequency response of 26Hz– 20kHz (+/- 3dB). Each speaker has a 9" woven carbon fiber woofer with 2" voice coil, a 5.25" poly paper midrange speaker with resounding chamber technology, which hosts a 1.5" voice coil, and a 3" titanium silk dome tweeter with 1" voice coil; the ultimate for in-wall Home Theater Systems! Mounts vertically or horizontally between 16" studs. Available in both black & white finish. Install where only the best will do!


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CEPro Best - 2011














GTL Sound Labs, LLC Audio Perfection AP 21133



The AP 21133 / AP21133C speakers were specially designed as wall baffled fronts & center channel for a large Home Theater where the speakers will be placed behind the screen. They are able to clearly project 55 feet (16 m) with flat response and have a near perfect on / off axis sound curve. The tweeters deliver balanced highs that compensate for the massive bass that is found in the theater. They are also exceptional as floor HT speakers using at least 18” stands. These speakers will deliver superior sound to other costing 4 times more. Each speaker contains 2 – 11” Woven Carbon Fiber Woofers with rubber surrounds, 11.5” x 6.5” (29cm x 16.5cm) Aluminum Horn Lens with 3” (72mm) Voice Coil and 60oz (1.7 kg) magnet and 2/3 – Selenium Horn Loaded Dome tweeter with 1.4” (36mm) Voice Coil. A True Home Theater deserves true Home Theater Speakers. Install where only the best will do!




1) Designed for large Home Theaters where speakers will be placed behind the screen.

     2) Clear projection up to 55 feet with no loss of frequency.

  3) Heavy built for lifetime installation with high margins.

Integrator Benefit

The AP 21133 speakers provide an exceptional home theater speaker for large installs where sound truly matters. Because of the strong response pattern they are very easy to install. Dealer margin are very high while providing for the very finest for your customers. If you install true Home Theaters, these are your speakers!

Promotional Description

The AP 21133 Home Theater speaker is exceptional for large theaters where the speakers will be placed behind the screen and sound truly matters. A True Home Theater deserves true Home Theater Speakers. www.gtlsoundlabs.com






GTL Sound Labs, LLC

4900 Rocky River Road
Charlotte, NC  28215
Tel: 704-596-9823

GTL President Gary Little Interviewed by Digital Home (Chinese)


CEPro Article - December 2011

GTL Sound Labs AE 963 in-wall loudspeaker

The AE 963 in-wall loudspeaker from GTL Sound Labs can be mounted horizontally or vertically and the company offers the speaker in a choice of black or white.


By Robert Archer, December 09, 2011


Within the world of specialty electronics a good case could be made for the loudspeaker category being the biggest in the entire market. A good example of just how big the category is can be found when looking at the 30-plus year old manufacturer GTL Sound Labs. The U.S.-based company has quietly been in business since 1976 and it offers a complete line of products, which ranges from one-off custom products, to production products like the AE 963 in-wall loudspeaker. The company says the AE 963 has been engineered to provide the highest levels of performance and the product is designed for either vertical or horizontal mounting to allow it to be used in a whole-house audio system or home theater system. GTL says the speaker employs a sealed enclosure that minimizes sound leakage into adjacent rooms, and internally the speaker houses a three-way design that includes a 9-inch carbon fiber woofer, a 5.25-inch poly paper midrange driver and a 3-inch silk-dome tweeter. GTL adds the speaker fits into a standard stud bay and the speaker offers a frequency response of 26Hz to 20kHz.


                                   GTL Sound Labs says it has designed the AE 963 to fit in a standard stud bay and it used in home theaters and traditional audio systems.

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