HV-X series HV-1, Beyerdynamic A1 headphone amplifier AMP circuit modeled version of the perfect experience more than two years, summed up the burning faithful in their experience of actual installed capacity of the mill and then developed with
HV-1 highlights
1 Current tube, to enhance the driving force control, sound field is wider; effective solution to the original the A1 circuit is to promote AKG, Sennheiser series of headphones IF weak to control the poor, to enhance the effect is very obvious!
2 300MV headphone dedicated protection circuit
3 Omron power relay, have greater contact with the copper than the small signal relay, lower signal loss
4 AMP op amp power supply, a separate regulator to enhance separation
5 Optimized to handle higher signal-to-noise ratio
HV-1 Summary of the sense of hearing
Three sections balanced, neutral alcohol, fit all types of headphones, "wild king" headphone amplifier
HV-1 Introduction to the use of materials
High-quality double-sided PCB, FR1.6MM plate, 1OZ copper pads HASL
Taiwan produced colored ring precision resistors of 1%
Matsushita FC 2700UF Electrolytic capacitors
Matsushita NXL Electrolytic capacitors
Sound at the end of the Japanese Murata monolithic non-polar capacitors, clean and free of coloration
ST 33078N dual op amp, ST DB139-140 power output tube
RIFA 840 4U7 coupling capacitor MKP used
Technical parameters
effective Vp-p 23.47
Frequency response, 20 HZ-20 KHZ (+ 0.01, 0.09),
signal-to-noise ratio:-90 DB or below,
the dynamic response, more than 91 DB
• total harmonic distortion (THD) : < 0.007%
• intermodulation distortion: < 0.007%
• stereo separating degree: > 88 DB (1 KHZ)
input Voltage: recommned AC15V-0-AC15V 30VA
PCB size:160X110mm