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High Definition Technology&Audio (HDTA) is a subsidiary brand of Sound Magic Pro Audio for consumer electric market. HDTA aim at combine perfect hardware design with cutting edge DSP processing technology and software. HDTA mainly focus on DAC and Headphone Amps.

UltraSoundResolution also is a sub brand of Sound Magic Pro Audio for consumer electric, which aim at providing high-end headphones with cutting edge DSP technology to public.