Bluetooth audio module cuts wireless speaker development time

HiWave says its DyadBA3 module extends battery life in small-format, portable wireless speakers. It is intended for power-efficient, Bluetooth-streaming stereo loudspeakers. Combining HiWave’s HiAS2002 Audium amplifier chip with CSR’s BC-05 Bluetooth technology, the DyadBA3 supports AVRCP and A2DP Bluetooth audio profiles and delivers two channels of 13W burst power output into 8-ohm speaker drive units. aptX and HSP (headset) profile support is in development.

The HiAS2002 extends battery life by up to 20 times at normal listening levels, compared with Class-D amplifiers. The amplifier’s envelope-tracking technology eliminates clipping at high audio levels, ensuring clear sound at all volumes.

The DyadBA3 module may be entirely powered from a single lithium-ion or lithium polymer battery. It incorporates circuitry for charging from a USB host or AC power adapter.

HiWave’s Audium audio processing includes multi-step volume control at 1.5dB per step, a mute function with adjustable ramping, and 16 user-definable bi-quad filters for implementing equalisation, voicing, tunable bass extension and stereo-wide effects. The DyadBA3 module self-configures on power-up and invokes power-saving modes when no audio signal is present. It incorporates a stereo microphone input, making it also suitable for desktop or portable VoIP-phone audio portal applications.

Sized 110 x 46 x 25mm, 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 BMRs creates 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 HIBM36S05 BMRs will deliver an even higher level of full-range, widely dispersed sound.

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