Yisheng HIFI PASS 1.7 Audio Pre-amplifier

by tanahkow Sat Dec 04, 2021 9:07 am

Yisheng HIFI PASS 1.7 Audio Pre-amplifier (2020) - 230V

Condition: 8.5/10. All working in good condition. No box.
Reason: Selling due to upgrade
Price: RM1500
Area : PJ / Puchong

Pics (from seller aliexpress website)

Yisheng HIFI PASS 1.7 Audio Pre-amplifier Had4f110

Yisheng HIFI PASS 1.7 Audio Pre-amplifier Hfd72a10

Yisheng HIFI PASS 1.7 Audio Pre-amplifier H3592d10

Contact/Whatsapp : 0one0-8zero86743 - Ng

Bought from here https://www.aliexpress.com/item/4001180333023.html?spm=a2g0s.9042311.0.0.27424c4ddBLdEI

Product Details: (from seller Aliexpress website)
Use all-aluminum high-end case, solid aluminum knob.

Advanced double-sided thickened gold-plated PCB. The two channels are designed on the same PCB, but the power supply and ground of the two channels are completely separated.

Left and right channel independently uses a 40W advanced R-type transformer to ensure the separation of the left and right channels.

Use the new IRF field effect tube amplification (IRF610/9610),, Panasonic pin electrolysis, Benike YONTEX electrodeless MKP coupling capacitor.

Nutrik XLR gold-plated interface, gold-plated RCA.

The voice of the machine is mellow and sweet, the elasticity of the low frequency is powerful, the slender vocal of the high frequency is strong, and the feeling of leaving the box is strong. There is a feeling that attracts you to listen to it and does not want to shut down! Full of charm and extremely audible! It is a very good value pre-amplifier.

In order to solve the problems of low reliability caused by the use of potentiometers in traditional volume control, contact sliding noise, dynamic decrease at low volume, and narrow frequency response, the relay switching method is used as the volume control method, which can easily adjust the volume. It not only saves the trouble of connecting the external volume board, but also shortens the signal flow of the music channel, and also helps to improve the sound quality.

PASS 1.7 pre-amplifier is a fully balanced input/output. Of course, it can also be unbalanced input, balanced output, balanced input, unbalanced output, according to your own equipment.
Specifications:
Input: 2 groups*balanced input, 2 groups*RCA input

Output: 1 groups*balanced output, 1 groups*RCA output

XLR interface definition: 1GND, 2+, 3-

Working voltage: AC115V or AC230V

Dimensions (W*H*D): 435*83*300MM

Net weight: about 6.5KG