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Tube kt88x4 Hi-Fi integrated & power amplifier and headphone amplifier all in one

Item number: TO0540
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1390.00
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  • Description
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Tube kt88x4 Hi-Fi integrated & power amplifier and headphone amplifier all in one

 

Features:
• Pure hand-made, point-to-point hand-made.
• Use a square power transformer specially designed for this machine.
• The output transformer uses two high-quality broadband ei output transformers.
• The preamplifier stage uses a 6 sn7 for power supply filtering.
• The voltage amplification stage and the push stage use two pairs of 6 sl7 and 6 sn7 tubes respectively.
• The power amplification stage uses kt88 tubes for class AB push-pull power amplification.
• Triode and ultra-linear selection are available. The triode works in a soft, pure and slender sound, suitable for listening to vocals, strings and other types of music. Ultra-linear working mode, tone tone open, unrestrained, good momentum, suitable for large scenes, large dynamics and other types of music to enjoy.
• External independent BIAS-ADJ current display head. Adjustment and bias meter monitoring function keeps the best state of the power tube at any time.
• External kt88 tube selection function, easy to replace different types of tubes, adding endless fun.
• Full-featured infrared remote control.
• Use thick silver-plated signal lines.
• With pure post-level function, it can be connected to an 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 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:
45W + 45W (RMS ultra-linear working condition) (KT88)
Filter tube of preamp power supply: 6 SN7 * 1
Voltage amplifier stage tube: 6 SL7 * 2
Driver stage tube: 6 SN7 * 2
Power vacuum tube: KT88 * 4
Current Supply voltage: 230V, 240V, 50Hz/60Hz
Power consumption: 310W
Packing size (W*H*D): 550*560*334mm
Net weight: 26kg
Gross weight: 30kg
Working conditions: Temperature: 0°~40°C, Humidity: 20%-80%

Precautionary measures for tube amplifier:
1. Tube amplifier must be connected to speakers before power on. Prohibit sending signals to the amplifier without connected loads (speakers) or the load short circuit when the switch is turned on.
2. Too high or too low supply voltage will irreversibly damage the amplifier, preferably less than 5% of the specified voltage. If your mains voltage exceeds this value, often best to use with the AC power supply.
3. Temperature is higher when tube amplifiers are working, pay attention to ventilation, cooling.
4. In the trunk or just shut down for a period of time (within 30 minutes), do not spill liquid on the tubes.
5. You should take about 100h to run the amplifier. Run-in the amplifier will give the best and stable sound. So during the first 100h of use time, the sound may not be the best, you can also use your own run-in method.
6. If you are not sure how to connect the tubes, please contact us before you try
Speaker connection:
All tube amplifiers with stereo mode used: l (left) and r (right) speakers.
Normally there are 6 speaker cable connections: +8l, +4l,-0l,-0r, +4r, +8r
Example: +8l and -0l are for connecting to your left 6-8ohms speaker
-0r, +4r is for connecting to your right 4ohms speaker

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