OldChen 845 Tube Amplifier HIFI Single-Ended Class A 300B 6SN7 Amp
OldChen 845 Tube Amplifier HIFI Single-Ended Class A 300B 6SN7 Amp

OldChen 845 Tube Amplifier HIFI Single-Ended Class A 300B 6SN7 Amp

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Model: OldChen 845
Starting at: $979.99USD  $925.99USD
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Shipping Weight: 32Kg 9 Units in Stock
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Preamp tubes: 2 x Special customize 6SN7(grey plate) or 6SN7-SE (Gold pins, black plate)
Driver tube:  2x Special customize 300-SE or 300-SEN (both with gold pins,  black plate)
Power tubes:  2 x PSVANE HIFI serie 845(grey plate)   or
              2 x Special customize for Laochen 845-SEC(Gold pins, black plate)
 Output power : 25Wx2 (8 ohms),  
Power transformer Power: 150W
Frequency response: 18Hz-35KHz
Output Impedance: 4 - 8 ohm
Total Harmonic Distortion: ≤ 1% (1kHz)
Input Impedance: 100K ohms
Input Sensitivity: 500mV--2000mV
SNR: 87db
Size (W × D × H): 430(W)×340(D)×280(H)mm
Net weight: 27 kg
Package weight: 30Kg
Input voltage for: AC 50-60hz /110-120v, 220v  230v-240V

Since 2 years preparation and testing , Laochen in the end release their latest flagship big power 845 tube amplifier 
Use one high voltage transformer and one lower voltage transformer, 2 x power transformers independently supply amp, in order to ensure amplifier's power at the same time reduce the interference, in the absence of output feedback, the noise is controled within 1-1.5 millivolt, making the sound of the amplifier more broadly natural. 
Using custom 6SN7 preamplifier, 
PSVANE 300B-SE to drive PSVANE 845 high-power bile duct drive output transformer, 
Between 300B and 845 is with stable efficient hi-fi coupling capacitors 
Use of metal film resistors, ALPS potentiometer and hi-fi level capacitors, 
signal amplification part use handmade scaffolding design to reduce the noise 
The power supply part use thickened circuit board. 
use for each high voltage and low voltage two inductance for filtering,
Use a delay of 30 seconds of the circuit, effectively protecting the life of the power tube. 
Taiwan's high-quality dual-head dynamic VU meter, 
Direct thermal triode 845 amp, both the performance of human voice and natural string and delicate, and also when dynamic time it's calm and magnificent, 
Gold-plated connectors 
3 inputs source with swither 
Free offer tubes protection grille 
All electronic component are high level quality
Manufactuer Laochen is most famous Chinese brand, they have 3 brands: "Oldchen" , "LaoChen", "Aiqin" ,  its EL34 series is already sold more 20000 copies.