Product: Willsenton R8 KT88/EL34 x4 Tube Integrated AMP Power Amplifier Headphone (Black)
Brand: Willsenton R8 KT88/EL34 x4 Tube Integrated AMP Power Amplifier Headphone (Black)
Color: Black

Features 
 Pure hand-made, the whole machine is welded with scaffolding. 
 Use a square power transformer specially developed for this machine. 
 The output transformer uses two high quality wideband EI output transformers. 
 The voltage amplification and boost stage uses a 6SN7 for power supply filtering. 
 The voltage amplification stage and the push stage use two pairs of 6SL7 and 6SN7 tubes, respectively. 
 The rear stage uses four KT88/6550/EL34 tubes for class AB single-ended power amplification. 
 Triode and ultra-linear selection are available. 
 External independent BIAS-ADJ current display header. 
 External EL34/KT88 tube selection function, easy to replace different types of tubes, adding endless fun. 
 Infrared full-featured remote control. 
 Use thick silver plated signal leads. 
 With pure post-level function, it can be connected to independent preamplifier signal input. 
 Power on mute delay function (about 30 seconds). 
 Select Japanese ALPS high-end motor potentiometer. 
 Easy-to-install plug-in tube shield. 
 
Product parameters: 
Frequency effect: 10Hz 40kHz (+/-0.5db) 
Total harmonic distortion: 1% (1kHz) 
Signal to noise ratio: 91dB 
Input sensitivity: 380mv (when Integrated amp input) 820mv (when pure power amp input) 
Input impedance: 100KΩ 
Output impedance: 4Ω, 8Ω 
Power supply voltage: 230V ± 5% (50Hz) ~ 115V ± 5% (50Hz) 
Machine volume (400*200*390) (W*H*D) mm 
Use vacuum tube: 6SN7*3.6SL7*2.KT88*4/6550EH*4/EL34*4 
Power consumption: 310W 
Net weight: 26kg 
Rated output power: 
25W+25W (RMS triode working state) 
45W+45W (RMS super linear working state) (KT88) 
25W+25W (RMS triode working state) 
40W+40W (RMS super linear working state) (EL34)
One amplifier can used wiht tube EL34, KT88 or 6550, so, you can get 3 kinds of sound from different models tubes. The default matching tubes of this machine is KT88. If you need another 2 new sets of tubes, please purchase in addition. There is a Red selection button on the Back of the amp to switch.
Pure hand-made, Point to point manual welding.
Willsenton R8 is an integrated Amplifier, it is a Power Amplifier too (there is a group Power amp input), it is a Headphones amp too.
Triode and ultra-linear selection are available which can be switched by the button on the amplifier
With a remote control,Vacuum tube protective cover,Fuse and an English manual.

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