WST R8 KT88x4 진공관 통합 앰프, 파워 앰프, 헤드폰 앰프가 하나로 결합된 제품

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All items guaranteed 100% BRAND NEW in the original edition Box.
• WST 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

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 driver stage use two pairs of 6SL7 and 6SN7 tubes, respectively.
• The power amp stage uses four KT88/6550/EL34 tubes for class AB Push-pull 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:
FTC rated output power : 16W+16W triode (8Ω, 20HZ-20KHZ, THD 1%) (KT88)
: 30W+30W ultra-linear (8Ω, 20HZ-20KHZ, THD 1%) (KT88)
: 12W+12W triode (8Ω, 20HZ-20KHZ, THD 1%) (EL34)
: 28W+28W ultra-linear (8Ω, 20HZ-20KHZ, THD 1%) (EL34)

Output Power rating (not tested under the FTC standard): 23W+23W (RMS triode working state) (KT88)
Output Power rating (not tested under the FTC standard): 45W+45W (RMS ultra-linear working state) (KT88)
Output Power rating (not tested under the FTC standard): 20W+20W (RMS triode working state) (EL34)
Output Power rating (not tested under the FTC standard): 38W+38W (RMS ultra-linear working state) (EL34)
Overall frequency response: 12Hz-40KHz (±1.5dB)
Total harmonic distortion: 0.2% (1W/1kHz, rated output power less than 5%)
Signal-to-noise ratio: 91dB
Input sensitivity: 260Mv ((when be an Integrated amp), 560Mv (when be a Power amplifier) (EL34)
Input sensitivity: 320Mv (when be an Integrated amp), 700Mv (when be a Power amplifier) (KT88)
Input impedance: 100KΩ
Output impedance: 4Ω, 8Ω
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 
Power consumption: 280W
Dimension: (W*H*D): 400*203*390 mm （16*8*15inch）
Net weight: 26kg（57LB）
Gross Weight: 30kg(66LB)
Working Condition: Temperature: 0℃～40℃ Moisture: 20%～80%
Storage Condition: Temperature: -20℃～70℃ Moisture: 20%～90%