Product Description: - M8 Fever Hi-Fi Tube Bluetooth Digital Amplifier. The amplifier uses the TPA3116 core chip and delivers 50W dual-channel output. - Thick gold plating, M8 multi-group audio signal input, front-panel tone control, and free conversion. - 6J1 vacuum tube with large aluminum heat sink. - M8 BTM625 Bluetooth audio module with CSRA64215 chip, supporting A2DP, AVRCP, HFP, TWS, AAC, I2S, aptX, and aptX-LL. - 4MB SPI flash memory chip, external detachable high-gain antenna for lossless signal transmission. - Internal dual-relay circuitry and high-precision custom crystal oscillator with power-on protection. - - ESS9023 Bluetooth decoding, 24-bit stereo audio digital-to-analog conversion chip (DAC). Hyperstream architecture, 112 dB dynamic range. - The M8 audio input can connect computers, CD players, and lossless music players. It can also connect computers and tablets via Bluetooth. - The audio output can connect desktop passive speakers and bookshelf speakers (passive bookshelf speakers under 4 ohms, 150 W; 8 ohms, 100 W). Specifications: - Audio Input: RCA input, 3.5mm stereo input, Bluetooth input - Voltage Input: 19V/4.7A - Rated Output Power: 8 ohms 2 x 30W, 4 ohms 2 x 50W - SNR: 99dB - Frequency Response: 50Hz-60Hz - Color: Silver/Black - Channels: 2 channels - Output Power: 2 x 50W - Weight: 0.8 kg - M8 Dimensions: 16 x 11.5 x 7 cm (L x W x H) Package Contents: - 1 x Main Unit - 1 x Power Supply - 2 x Electron Tubes - 1 x Bluetooth Antenna