In addition to visual tuning via meter, the GA-30 can play reference pitches from its internal speaker (Sound Out) for tuning by ear.

除了通过视觉调谐米的GA - 30可以发挥其内置扬声器(声音输出)，供参考球场耳调整。

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Acoustic Research (AR) , a brand owned by VOXX International Corporation (NASDAQ: VOXX), today unveiled a new addition to its line of Bluetooth indoor portable wireless speakers -- the ARS60 portable wireless speaker.

ENGADGET: Acoustic Research's $120 ARS60 Bluetooth speakers seem oddly familiar