St. Martha's Catholic Parish Installs SLS International's Sound System

MURIETTA, Calif., June 29, 2005 - SLS International (OTCBB: SITI) announced today that St. Martha's Catholic Parish has selected and installed an SLS's sound system for its 1,600-seat sanctuary.

"The worship leaders wanted a building that would give them a lot of new tools for the wide range of musical arrangements performed during services," said Jeff Miller, of Sound Technology Consultants, who specified the design. "Acoustically, their desire was to have a room that would really support those functions, and still maintain a high level of clarity. They wanted something where the orchestral players and choir would have a nice resonant character without the intelligibility problems typically associated with an acoustically 'live' building. We went with the SLS Loudspeakers products because we knew they would help us to achieve this goal."

The seating at St. Martha's is in a U-shape surrounding the altar on three sides. The choir loft is facing the altar at a 90-degree angle, speaking down the length of the building. One system is set up for the altar area comprised of two LS8695 column line arrays per side, recessed into the walls located on each side of the altar. In addition to the line arrays, US8190Ts are used to reach the area directly to the side of the column units and also as delay speakers to cover the back four corners of the auditorium. The delay speakers hang from wood truss beams and were custom painted to match the decor of the building.

The choir area has a separate music system comprised of four 112RTs. Two units are positioned on each side of the loft area and are hung from beams flanking the future organ location. The choir also uses US8190's as floor monitors. These units provide the primary reinforcement for anything happening in the choir area. In addition, the four delay speakers are fed by this system to cover the corners of the room.

There are two 215EL Dual 15" subwoofers mounted on the front wall of the building, which are fed by both systems for low frequency reinforcement.

Miller designed the project using SLS' Line Array Simulation Software (LASS) to position the speakers for optimum coverage, limiting any challenges faced during installation.

"We installed unistrut on the sides of the speaker cavities to allow for flexibility in aiming," said Tim Carlson of AMT Systems who completed the installation. "If any changes needed to be made in regards to the placement, we just undid some bolts and slid the units forward or back. It was a simple installation and we are very pleased with the results."

About SLS

Based in Ozark, Mo., SLS International, Inc. is a 30-year-old manufacturer and developer of new proprietary [patent-pending] ultra-high fidelity Ribbon Driver loudspeakers, patented Evenstar Digital Amplifiers and sound systems for the commercial, home entertainment, professional and music markets. SLS has perfected the ribbon-driver technology enabling their loudspeakers to achieve exceptional inner detail and accuracy with 20% to 30% less distortion of typical compression driver and dome tweeters. SLS speakers and systems are used in high-profile venues such as NBC/MSNBC's 2002 and 2004 Olympics studios, the Recording Academy's Grammy Producers SoundTable events, and for the NAMM winter show, providing sound in the AVID Technology booth just to name a few. For more information, visit http://www.slsaudio.com.

Matters discussed in this press release contain forward-looking Statements within the meaning of the Private Securities Litigation Reform Act of 1995. When used in this press release, the words "anticipate," "believe," "estimate," "may," "intend," "expect" and similar expressions identify such forward-looking statements. Actual results, performance or achievements could differ materially from those contemplated, expressed or implied by the forward-looking statements contained herein. These forward-looking statements are based largely on the expectations of the Company and are subject to a number of risks and uncertainties. These include, but are not limited to, risks and uncertainties associated with the impact of economic, competitive and other factors affecting the Company and its operations, markets, product, and distributor performance, the impact on the national and local economies resulting from terrorist actions, and U.S. actions subsequently; and other factors detailed in reports filed by the Company with the Securities and Exchange Commission.

Source: SLS International, Inc.

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Jeff Lowry, Communications of SLS International, +1-417-883-4549, fax, +1-417-883-2723, or marketing@slsloudspeakers.com; or Ed Lewis of CEOcast Inc., +1-212-732-4300, fax, +1-212-732-1131 or elewis@ceocast.com, for SLS International.