Apogee Technology Announces QRX Audio Power Supply Technology.

Business Editors/High-Tech Writers

NORWOOD, Mass.--(BUSINESS WIRE)--June 24, 2003

Technology Provides High Quality Power Conversion for Audio Applications

Apogee Technology, Inc. (NASDAQ: APGT), a leading provider of digital audio amplifier solutions, announces QRX(TM) a new switch mode power supply (SMPS) technology. QRX provides high efficiency AC to DC power conversion meeting the performance and size requirements of audio applications such as home theater systems. The company has integrated the QRX technology into a custom module to support SMPS designs from 150 watts to over 1000 watts making it the perfect solution to be used with Apogee's line of DDX(R) amplifier products or other applications requiring high quality power conversion.

The audio amplifier market is dominated by six channel home theater systems that provide up to 150 watts of audio power per channel. Current systems are bulky because they use large transformers to convert AC power at the outlet into DC power required to operate the audio amplifiers. In order to meet consumer demand for smaller products, manufacturers are transitioning from large transformer based power supply designs to smaller, lighter, high efficiency SMPS designs. Existing SMPS solutions are designed to supply a constant power output and as a result they perform poorly in audio applications where the power demand can vary from zero to full output almost instantaneously. For example, current solutions can lose up to 30% of the output power during dynamic audio passages, such as the reproduction of a kettledrum or an explosion. Apogee's QRX technology solves this dynamic output problem using a patent pending, quasi-resonant (QR) approach that provides up to 60 times better control of the power output, fully restoring the audio experience.

"We developed QRX technology to meet our customer's demands for a compact, reliable, high quality audio power supply," said David Meyers, Apogee Chief Operating Officer. "Apogee will offer this technology in an integrated module along with SMPS reference designs. Customers will have their choice of building their own supplies or purchasing a complete supply from our manufacturing partner. Apogee plans to release QRX based power supply modules samples in July and two SMPS reference designs in September. The company also plans to further develop QRX technology to increase the market potential beyond consumer electronics applications."

The first QRX SMPS reference designs will support the company's 6x50 watt and 6x100 watt DDX amplifiers solutions by providing 180 and 350 watts of continuous and 250 and 600 watts of peak power respectively. The main audio supply will operate at over 90% efficiency with less than 0.5% composite line/load regulation and less than 500 mV of ripple. The designs will support worldwide line voltages of 90-132 VAC or 180-264 VAC and include over-current, over-voltage and short circuit protection. Apogee can develop custom SMPS designs using the QRX module to provide over 1000 watts of high quality DC power.

About Apogee Technology, Inc.

Apogee Technology, Inc., designs, develops and markets integrated circuits that incorporate the company's patented Direct Digital Amplification (DDX(R)) technology. This all-digital, high efficiency audio amplifier technology has significant commercial benefits including enhanced sound quality, expanded functionality, reduced product size and lower manufacturing costs compared to traditional analog amplifier solutions. The company markets and sells its DDX ICs to leading digital consumer electronic corporations worldwide. For more information please visit our web site at: http://www.apogeeddx.com.

DDX(R) is a registered trademark of Apogee Technology, Inc. All other product names noted herein may be trademarks of their respective holders. Certain statements made herein that use the words "estimate", "project", "intend", "expect", "believe" and similar expressions are intended to identify forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements involve known and unknown risks and uncertainties, which could cause the actual results, performance or achievements of the company to be materially different from those which may be expressed or implied. Please refer to the company's risk factors as set forth in the company's filings with the Securities and Exchange Commission, including its reports on Form 10-KSB and 10-QSB.

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