Willsenton R8 stereo Amplifier tube KT88*4 Integrated Amplifier & Power Amplifier & Headphones amp
The Open box item is in USA,Only ship to USA.
About the old version for Willsenton R8 we have changed the 300uF450V capacitor to 330uF500V.
Add 2 Resistors at Bais PCB for each of KT88 to protect KT88 tube once BIAS potentiometer lose efficacy.
The Open box item may will have traces of use but all in good performance.We will be tested and inspected before shipment. Thank you!
We can send it in 3 days, and take 4-10 business days about to your door in USA. Shipping to USA ONLY thanks.Come with Tubes Brand Willsenton (KT88, 6SN7, 6SL7)
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.
One amplifier can used wiht tube EL34, KT88 or 6550, so, you can get 3 kinds of sound from different models tubes if you buy more 2 new sets of tube.
Triode and ultra-linear Switchable.
Declaration
Features:
• Pure hand-made, Point to point manual welding.
• Use a square power transformer specially developed for this machine.
• The output transformer uses two high quality wideband EI output transformers.
• The preamp stage uses one 6SN7 for power supply filtering.
• The voltage amplification stage and the push stage use two pairs of 6SL7 and 6SN7 tubes, respectively.
• The power amp stage uses four KT88/6550/EL34 tubes for class AB single-ended power amplification.
• Triode and ultra-linear selection are available. The triode works in a soft, pure-and sleek sound, suitable for listening to vocals, strings and other types of music. Ultra-linear working mode, sound-tone open, unrestrained, good momentum, suitable for enjoying big scenes, big dynamics and other types of music.
• External independent BIAS-ADJ current display header. Adjustment and BIAS meter monitoring function keeps the best state of the power tube at all times.
• 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, soft-start feature to prolong tube life (about 30 seconds).
• Select Japanese ALPS high-end motor potentiometer.
• Easy-to-install plug-in tube cage cover.
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
Rated output power:
25W+25W (RMS triode working state) (KT88, 6550EH or EL34)
45W+45W (RMS ultra-linear working state) (KT88, 6550EH)
40W+40W (RMS ultra-linear working state) (EL34)
Preamp stage power supply filtering Tube: 6SN7*1
Voltage amplifier stage Tube: 6SL7*2
Driver stage Tube: 6SN7*2
Power vacuum tube: KT88*4 or 6550EH*4 or EL34*4 (only 1 kind of power tube come, you need to choose)
Power supply voltage: AC 100V to 240V 60Hz/50Hz, 110V, 115V, 120V, 220V and 230V version are in stock. (there is a 230V/115V voltage change-over switch inside of body), (100V, and 240V version need to take 3-14 business days to order)
Power consumption: 280W
Dimension: (W*H*D): 400*200*390 mm
Net weight: 26kg
Gross Weight: 30kg
Working Condition: Temperature: 0℃～40℃ Moisture: 20%～80%
Storage Condition: Temperature: -20℃～70℃ Moisture: 20%～90%
