Audio-Technica AT-PHA55BT

  • Audio-Technica AT-PHA55BT

Audio-Technica AT-PHA55BT


Audio-Technica AT-PHA55BT Bluetooth Headphone Amplifier 藍芽 耳筒放大器

The AT-PHA55BT wireless headphone amplifier is a compact but powerful tool that will help you get the most out of your headphones – wherever you go. Utilizing Bluetooth® wireless technology and supporting LDAC, aptX, AAC and SBC audio codecs, the amplifier processes the digital transmission from your Bluetooth device and faithfully converts it to an analog signal via an ESS Technology ES9118 HiFi System-On-Chip (SoC). Offering up to eight hours of continuous use and a max output level of 50 mW + 50 mW, the AT-PHA55BT has the power to drive your headphones to their full potential. 


Maximum Output Level: 
50 mW + 50 mW (at 16 ohms, T.H.D. 10%) 
25 mW + 25 mW (at 32 ohms, T.H.D. 10%) 
2.5 mW + 2.5 mW (at 300 ohms, T.H.D. 10%) 
Output Connector: 3.5 mm (1/8") gold-plated stereo mini jack 
Battery: DC3.7 V lithium polymer rechargeable battery 
Battery Life:
Max. 8 hours continuous use (100 hours standby) 
Charging Time: Approx. 3 hours (for 0-100% charge) 
Operating Temperature: 41 – 104° F (5° – 40° C) 
Dimensions (excluding protrusions): 79 mm (3.1") H × 32 mm (1.3") W × 11 mm (0.4") D 
Weight: 28 g (1 oz) 
Accessories Included: 30 cm (1') USB charging cable, belt clip 
Type (Microphone): Condenser 
Sensitivity (Microphone): -36 dB (1V/Pa at 1 kHz) 
Frequency Response (Microphone): 50 – 8,000 Hz 
Polar Pattern (Microphone): Omnidirectional 
Input jack: Micro USB Type B 
Communication System: Bluetooth Version 4.2 
Output: Bluetooth Specification Power Class 2 
Maximum Communication Range: Line of sight - approx. 10 m (33') 
Compatible Bluetooth Profiles: A2DP, AVRCP, HFP, HSP 
Support Codec: LDAC, aptX, AAC, SBC