HV-1 Headphone Amplifier Finished Board W/ ALPS 27 Potentiometer (A1 Blueprint)
NOTE: This is a soldered and tuned finished board with an ALPS 27 type potentiometer.
PCB Size: 160mm*110mm
Works Voltage: Dual AC 12 - 16V
Highlights:
HV-1 highlights:
1, both current and tube, enhance the driving force and control, wider sound field; effective solution to the original version of the A1 circuit to promote AKG, Sennhei series headphones in the mid-frequency is weak, poor control of the problem, the effect of enhancement is very obvious!
2, 300MV headphones dedicated protection circuit, the current types of A1 are used UPC1237 chip amplifier protection circuit to act as a headset protection circuit, 1.2V protection, boxes and headphones? You know!
3, Omron power relays, than small signal relays have larger contacts and copper, signal loss is lower.
4, Separate regulated power supply to the op-amps in the AMP to improve separation
5, optimised ground processing, higher signal-to-noise ratio
HV-1 Listening Summary
Three balanced, neutral and mellow, suitable for all types of headphones, "king of all" headphone amplifier
HV-1 Material Introduction
High-quality double-sided PCB, FR1.6MM plate, 1OZ copper, pads sprayed with tin, Taiwan's 1% precision five-colour ring resistors
Main filtering electrolytic capacitors: updated to FK series 3300UF 4 PCS, decoupling electrolytic capacitors: warm sound low resistance - Panasonic NXL Audio Master, Italian AV electrodeless capacitors, sound bottom clean and no sound pollution.
A1 ST 33078N dual op-amp, ST DB139-140 power output tube
Constant Current Bias Circuit F BC550C-560C
RIFA 840 4U7 large volume coupling with MKP capacitors, kill ELNA Nichicon, WIMA MKS series coupling capacitors.
High quality Yongsheng YS215A headphone socket (Watanabe Silver)
Package:
1x HV-1 Headphone Amplifier Board
Shippment:
1.Every parcel will be registered with tracking number.
2.International shipping requires complicated shipping procedures (such as both countries customs, transit stations etc.), also will be affected by many factors, such as holidays, weather conditions et. If the transportation time is not normal, please contact us
1.Every parcel will be registered with tracking number.
2.International shipping requires complicated shipping procedures (such as both countries customs, transit stations etc.), also will be affected by many factors, such as holidays, weather conditions et. If the transportation time is not normal, please contact us
