yaqin Yaqin MC-13S Push-Pull Stereo Integrated Tube Amplifier,Output Power 40Wx2, Tubes:12AX7*2, EL34*4,12AU7*2, AC110(USA) and AC230(Europe) Optional

please note for the orders from USA, Canada or Mexico, the AC voltager is 115 volts, insteadf of 230 volts. The reason why the amazon page shows the AC voltage is 230 volts is that this product is also selling in Europe Amazon, then Amazon automatically harvested the AC voltage 230 volts. YAQIN MC-13S is considered one of the best class A integrated amplifiers in 2021 by review group of amplifier experts in USA and Europe. The first guarantee to Yaqin MC-13S high-quality sound is the bare-bones and straight circuitry and ultra-linear push-pull design. The second guarantee is the high quality of components including audiophile-grade resistors, coupling capacitors, and volume controls. Off all the components, the transformers stand out most. Both the input and output transformers are very high quality. It starts with the oxygen-free enameled copper used in the windings for the transformers cores. It ends with the use of 35-milimeter Japanese steel sheet employed in the building of the laminated stacks surrounding the core windings. Additional Characteristics on MC-13S amp : manual biasing. 4 switchable line input. Convenient analog VU-meter. Spec: Output Power: 40W + 40W (8Ω) Distortion: ≤ 0.9% (28W) Frequency response: 10Hz-60KHz (± 2dB) SNR: ≥ 85dB (A weighted) Load impedance: 8Ω or 4Ω Power consumption: 240W Sensitivity: ≤ 0.26 V Tube: EL34 x 4, 12AX7B x2, 12AU7 x 2 Dimensions: 470mm(D) *315mm(W) *175mm(H) Input Power Voltage: AC110V/230V 60Hz/50Hz (110V / 230V) Net Weight: 22 kg