JBH 6H9C EL34 or 6P3P Tube Amplifier HIFI EXQUIS Handmade Scaffolding finished lamp amp JBHEL346P3PCY

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  • EL34 Power Tube
  • Without tubes
  • 6P3P(6L6) Power Tube

EL34 Power Tube : Option is with EL34 Power Tube:

6P3P Power Tube : Option is with 6P3P Power Tube:

Without tubes :  Option is without any tubes, you need plug your to work with this amplifier





Technical parameters:

  • Output Power: 8W × 2
  • Harmonic distortion: ≤1%
  • Signal to noise ratio:  ≥89dB
  • Input sensitivity:  600mV -2V
  • Input impedance: 100KΩ (stereo input)
  • Output Impedance: 4Ω - 8Ω
  • Frequency response: 20Hz-26KHz
  • Distortion rate: ≤0.5% (1kHz)
  • Rectifier: 5z4 (replaced by 5Z4P, 5z3p, 5u4g)
  • Preamp tube: 6H9C or 6h8c or 6N9P (equivalent to 6SN7 or 6SL7)
  • Power tube: EL34(6CA7/5581) or 6p3p(6L6)
  • Power Transformers: 96 * 50 (160W)
  • Output Transformers: 76 * 40 (4 clip around the law 3)
  • Choke: - (5H) 76 * 40
  • Net weight: 9.5KG, 
  • GW: 12.5kg
  • Size: 38cm wide x17cm high x Long 16cm containing tube
  • Input voltage: 110/120v or 220-240v 50/60hz


  • Voltage amplification with 6n9p(6h9c) tube for pre-voltage amplifier circuit is characterized by: high-speed and low-distortion, small coupling capacitance, the phase shift is small, fast response, low distortion, dynamic, good stability, can be faithful amplifying CD player wide range signals, the reproduction of natural sound field space.
  • The power output tube is two EL34-B,  sound smooth and delicate, moist and plump, tube factory production EL34-B is radio beam tetrode genus, such pipes are suitable for moderate manufacturing power amplifiers. Compared with KT88, its tone is more delicate and sweet, more expressive. Musical tastes, unlike EH tubes so straight forward, undulating rhythm of music and especially good, sound field positioning is very good. Thickness also happens to sound, resolution also performed well.
  • Rectifier with a NOS rectifier 5h4c(5Z4P) tube, rectifier can reduce the current impact, especially when choosed the large filter capacitance can effectively avoid indirectly heated cathode tube aging. Keep tube amps's pedigree, the sound is more resistant to listen.
  • About output transformer core using H250 76 * 40 0.35 import audio special cold-rolled silicon steel high silicon, permeability 10,000 or more, the surface smooth and tidy, with 4 clips 3 tiered system of law around the winding, vacuum impregnation. Core dimensions: EI-76 * 40 thick stack: passband: 20HZ-30KHZ. Because a large part of the cost of tube amps is the output transformer, about the procedure is always looking for a balance between the distributed capacitance, leakage inductance and DC resistance, inductance. Only good output transformer can play the perfect performance of  tube amp, only full of material output coupled to the tube sound. To meet the audio transformers have good high range frequency response characteristics of the request. In line package winding leakage inductance and stray capacitance we do the minimum possible, for craftsmanship we put a side line package uses a hierarchical way around the system to reduce the leakage inductance and stray capacitance of the transformer. Line package with high-purity copper enameled wire wound, refused to use aluminum and copper clad aluminum wires like to ensure that sound perfectly reproduce Moreover transformer temperature rise can be effectively controlled,  offer an endless power to system
  • About a Class A amplifier tube amp power transformer, a large power supply, no-load current is large, the bass when the power transformer power will be significantly liter, if the transformer power will obviously affect the sound quality is not enough! To ensure perfect sound quality output, we use 160W of power transformers to ensure that large dynamic sound more perfect. Line package with high-purity copper magnet wire wound
  • All scaffolding welding by hand, ear to the speaker at maximum volume in order to hear a little bit of a small tube basic noise! (in the big volume condition, the noise level has a great relationship with sound source and signal input cable quality )


Special instructions:
This tube amp is to go with some speakers have 90db sensitivity and above 6.5 inch bass unit , will give the good effect, with 86 87db speakers the effect is relatively poor