407-050 BRZHIFI Bluetooth Tube Amplifier 2x40W Hifi Power Amp Assembled 6H3 Tube + STK407-050 Description: It is designed with STK407-050 power amplifier module. The circuit of this model is special, the quiescent current is not low, but the operating temperature is not high. The sound is clear, sharp and not frizzy.When paired with 6H3 tube, the vocal string music is charming and friendly to ears. Designed output power is 40W+40W at 6O, and the distortion is THD0.05%. Pushing general bookshelves or floor-standing speakers can achieve satisfactory results. As a comparative LM3886 power amplifier chip, 68W power is obtained under a 4-ohm load, and the power is only 38W under an 8O load, which is much lower than the 45W of STK407-050. This machine is equipped with Bluetooth 5.0 and USB input. The shell of the machine is made of CNC aluminum alloy, and the middle heat sink is thick enough to dissipate heat, and the transformer cover can ensure as little interference as possible. The appearance of the whole machine is exquisite and compact, which is convenient to use. There are 3-way to input, that is, Bluetooth, USB and wired inputs. Specifications: - Model: 407-050 - Channel: 2 - Impedance: 4-8O - Amplifier type: Hifi power amp - APP: Not support - Working method: Class AB - Output Power: 40W+40W/6O, distortion 0.05% - Frequency response: 20Hz to 20KHz - Bluetooth solution: QC3034 Bluetooth 5.0 for APT-X. USB can be used as an external USB sound card to connect to a computer - Dynamic range: >98 dB - Machine size: 152109261MM Package Included: - 1 x Set of Bluetooth Amplifier Note: - It is assembled and ready to use. Usually it cost about 35USD-50USD. If you receive defective item, please kindly notify us within 14 days. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps". The seller is "pincei_us" and is located in this country: CN. This item can be shipped worldwide.