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Bluetooth audio module bolsters speaker battery life

Posted: 31 May 2013 ?? ?Print Version ?Bookmark and Share

Keywords:HiWave Audio? boost amplifier? Bluetooth? speakers?

HiWave Audio has recently revealed the first in a series of production ready DyadBA3 modules offering significant power savings and superior audio quality for portable Bluetooth-enabled wireless speakers.

The module uses company's HiAS2002 low power amplifier combined with the BC-05. It is fully Bluetooth SIG approved and shipped with A2DP, AVRCP, Apt-x audio profiles as standard and AAC enabled to ensure compatibility across the latest Samsung smartphones and Apple iOS products.

At the heart of the module is the HiAS2002 boost amplifier, it delivers two channels of 15W burst power output into 8ohm speaker drive units and extends battery life by up to 10 times at normal listening levels (and more than 25 hours continuous playback), compared with Class-D amplifiers. The amplifier's envelope-tracking technology eliminates harsh clipping at high audio levels, ensuring clear sound at all volumes. At moderate listening levels the HiAS2002 wastes much less power than other amplifier topologies. This gives longer running time between recharges and enables the use of smaller battery packs.

The DyadBA3 module may be entirely powered from a single 3.7V lithium-ion battery. The module incorporates circuitry for 500mA charging from a USB host or 1.5A charging from AC power adapters. It incorporates a stereo microphone input, making it also suitable for desktop or portable VoIP-phone audio portal applications.

Sized 110x46x29mm, the DyadBA3 module makes an ideal front-end to HiWave's patented BMR (Balanced Mode Radiator) speaker drive units. Pairing the module with two HiBM36S12-8/A BMRs creates the platform for a compact, fully portable Bluetooth stereo speaker capable of delivering room-filling sound. For greater volume and frequency range, a pair of HiWave's new HiBM65C20F-8 BMRs will deliver an even higher level of full-range, widely dispersed sound.

HiWave is sampling the DyadBA3 (HiAM-DBA3-300) module with key customers and it will be available in mass production quantities and through HiWave's channel partners in July.

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