• The stereo Bluetooth amplifier adopts performance 2Pcs texas instrument 2 Amp Chip TPA3116D2, 2Pcs NE5532 Op-amp chipppest, Qualcomm QCC3003 Bluetooth 5.0 module, maximum dual-channel output power 50w x 2 + 100W to get clear audio sound, no pop, no audible noise, dead silent when nothing is playing through it
• Full frequency output from the speakers, using the custom made bass treble knob and the adjustable 40-300hz cutoff frequency for the subwoofer, you will be able to get the best sound
• Supports wireless playback from Bluetooth devices, Bluetooth 5.0 wireless music streaming technology with external antenna make a transmission distance of more than 15m/49ft
• Full metal shield to ensure high quality and durable, advanced circuit design, built-in speaker protection circuit to ensure clear and clean hi-fi sound; with unparalleled sound for customers looking for high fidelity sound
• Updated CD power outlet for safe use without sparks, included high quality 24v/4.5a power supply enough to drive most passive speakers and powered/passive subwoofer
• Works with all of today's latest Bluetooth devices (for iOS, Android, smartphone, tablet, etc.)

Specifications:

• Model: BT30D
• Chippest: TPA3116D2
• Maxpower output: 50W x 2 + 100W
• THD: 0.05%
• Output: 1W 
• SNR: ≥98dB
• Working voltage: 12-24V
• Speaker frequency response: 20Hz-20KHz (33dB)
• Low cutoff frequency range setting: 40-300Hz
• Device dimension: 118 x 132 x 35 mm/4.72 x 5.2 x 1.38”
• Input mode: Bluetooth/RCA
• Output mode: passive speakers + passive/active subwoofer
• Bluetooth: Bluetooth 5.0
• Bluetooth network name: FOSI audio
• Wireless range: up to 15m/49ft (Barrier-free)