<br>Features <br> Pure hand-made, the whole machine is welded with scaffolding. <br> Use a square power transformer specially developed for this machine. <br> The output transformer uses two high quality wideband EI output transformers. <br> The voltage amplification and boost stage uses a 6SN7 for power supply filtering. <br> The voltage amplification stage and the push stage use two pairs of 6SL7 and 6SN7 tubes, respectively. <br> The rear stage uses four KT88/6550/EL34 tubes for class AB single-ended power amplification. <br> Triode and ultra-linear selection are available. <br> External independent BIAS-ADJ current display header. <br> External EL34/KT88 tube selection function, easy to replace different types of tubes, adding endless fun. <br> Infrared full-featured remote control. <br> Use thick silver plated signal leads. <br> With pure post-level function, it can be connected to independent preamplifier signal input. <br> Power on mute delay function (about 30 seconds). <br> Select Japanese ALPS high-end motor potentiometer. <br> Easy-to-install plug-in tube shield. <br> <br>Product parameters: <br>Frequency effect: 10Hz 40kHz (+/-0.5db) <br>Total harmonic distortion: 1% (1kHz) <br>Signal to noise ratio: 91dB <br>Input sensitivity: 380mv (when Integrated amp input) 820mv (when pure power amp input) <br>Input impedance: 100KΩ <br>Output impedance: 4Ω, 8Ω <br>Power supply voltage: 230V ± 5% (50Hz/60Hz) ~ 115V ± 5% (50Hz/60Hz) <br>Machine volume (400*200*390) (W*H*D) mm <br>Use vacuum tube: 6SN7*3.6SL7*2.KT88*4/6550EH*4/EL34*4 <br>Power consumption: 310W <br>Net weight: 26kg <br>Rated output power: <br>25W+25W (RMS triode working state) <br>45W+45W (RMS ultra-linear working state) (KT88) <br>25W+25W (RMS triode working state) <br>40W+40W (RMS ultra-linear working state) (EL34)