Reisong - A20 Hi-Fi Intergrated Amplifier KT88 Tube Single-end Class A 4ND VU Meter
Brand: Reisong

You should take about 30-100h time to operate the amp.RUN-IN to the amp gives it's best and stable sound.so during the first 100h use time the sound maybe is not the best,you can also use your own run-in method.
Specifications:
Output Power: 8W * 2 (Ultra-linear connection)
Frequency response: 20Hz-35KHz
Output Impedance: 4,8Ω
Total harmonic distortion: ≤ 1% (1kHz)
Input Sensitivity: 750MV
Input impedance: 100KΩ (three sets of input signal)
Voltage amplification: Dawn 6J8PJ × 2.
Power output tube: KT88 × 2.
Rectifier tube: 5Z3PA-T × 1
Dimensions (W×D×H): 366×300 (including knob) × 185mm
SNR: 89dB
Weight: about 16.5 kg (114 power transformers, export version)
Gross weight: 18kg
Power Supply Voltage: AC 110V-120V/50Hz-60Hz(For United States）

Features:
With power tube current monitoring circuit, tube replacement upgrade ease.
Medical grade 5Z3PA-T rectification.
Imported 0.35 core output amplifier audio dedicated core, core stack thickness 86-50, A20 flux of 13,000
Output transformer potting techniques, ensure that the output of the amplifier stability and reliability
Double chassis design，not easy deformed.
Output amplifier with a new imported 0.35 core manufacturing, high-purity copper wire package enameled, layered segmentation, string and connection method
Imported 0.35 thick core manufacturing power amplifiers
Output amplifier with high-grade stretch amplifier housing cover.
Power Transformers: new imported 0.35, stack thickness 60MM (114-60).
Output amplifier core: core 0.35 new imported thick high silicon (86-50).
Japanese production of ALPS potentiometer.
Chassis: mirror stainless steel chassis.

KT88-98 power output.
6J8P-J pre-voltage amplification.
The new power amplifier 0.35 cores do to ensure stable power supply.
Output power, maximum output power of 8W+8W.
Output amplifier uses no big loop feedback technology to ensure high sound reduction, powerful