Fosi Audio BT30D Bluetooth 5.0 Stereo Amplifier 2.1 Channel Bass & Treble ControlIntegrated Amp Audio Subwoofer 50W x2 + 100WFeatures:The Bluetooth Stereo Amplifier adopt performance 2pcstexas instrument TPA3116D2 amp chip, 2pcs NE5532 op amp chippest,Qualcomm QCC3003 Bluetooth 5.0 Module, dual channel max output power 50Wx2 +100W to get clear audio sound, no pop.Speakers full frequency output, By using custom treble bass knob and adjustable40-300Hz cutoff frequency for subwoofer, youll be able to get the best sound!Supports wireless playback from Bluetooth devices, Bluetooth 5.0 wireless musicstreaming technology with external antenna make a transmission distance of morethan 15m/49ft.Full metallic shell to ensure high quality and durable, advanced circuitry design,built-in speakers protection circuit to ensure Hi-Fi clear and clean sound; Withunrivaled sound for the customers who pursue HiFi sound!Upgraded DC power outlet for safe use without sparks, included high quality24V/4.5A power supply enough to drive most passive speakers andpowered/passive subwoofer.Highlight:Model: BT30DChippest:TPA3116D2Maxpower Output: 50W*2+100WTHD < 0.04%:SNR 298dBWorking Voltage:12-24VSpeakers Frequency Response: 20Hz-20kHz(+1dB)Bass Cutoff Frequency Range Adjustment: 40-300HzDevice Dimension: L118 x W132 x H35 mm/472 x 5.2 x 138inchInput mode: Bluetooth/RCAOutput mode: Passive Speakers + Passive/Active SubwooferBluetooth: Bluetooth 5.0, up to 15m/49ft wireless range without hindranceEasy ConnectionBluetooth Network Name: FOSI AUDIO BT30DWireless Range: Up to 15m/50ft.