HP20

 

HP20 is a high performance stereo phono amplifier for MM and MC phono cartridges. HP20 offers exceptional performance in terms of transparency, dynamic and extraordinary imaging capability at its price range.

Ultra low noise semiconductor devices and audio grade electronic components are extensively used in HP20. We have implemented passive RIAA equalizer for HP20 because the elements of the equalizer have less coloration to the sound compared with active feedback RIAA equalizer.

Two discrete ultra low noise precision DC regulated power supplies are used for main dual power supplies. Additionally, four ultra low noise power supplies are used locally near to the amplifying circuits. These ensure that power supplies are free from noise throughout the phono amplifier.

HP20 follows the same generic structure of the higher version phono amplifier HP10 except without having a vacuum tube output buffer. The sonic performance of HP20 is nearly identical to HP10 but at a much affordable price level. HP20 is an excellent choice for use with any phono cartridges.

 


PRODUCT DESIGN

A stereo MM/MC phono amplifier with passive RIAA equalizer

 

INPUT

One set for MM or MC

 

OUTPUT

One set of unbalanced and one set of balanced output

 

MM GAIN

40dB for unbalanced output and additional 6dB for balanced output

 

MM INPUT IMPEDANCE

47k Ohm

 

MC GAIN

60 and 70dB for unbalanced output and additional 6dB for balanced output

 

MC INPUT IMPEDANCE

10, 33, 100, 250, 500 Ohm                

 

(Specifications subject to change without prior notice.)

 

  

RIAA DEVIATION

20 – 20,000Hz, ±0.3dB (for MM and MC)

 

DISTORTION

0.05%

 

OUTPUT IMPEDANCE

430 Ohm for unbalanced output

860 Ohm for balanced output

 

MINIMUM LOAD IMPEDANCE

10k Ohm

 

SIGNAL TO NOISE

70dB for MC, 85dB for MM

 

POWER CONSUMPTION

12W

 

DIMENSION

110 x 325 x 356mm (H x W x L)

 

NET WEIGHT

6.6kg/14.5pounds                                     

 

HP20 was named one of the 2017 Stereo Times "Most Wanted Components."

"John Lam has to be one of China’s most talented high-end audio designers.  The HP 20 is a solid-state phono preamp whose performance is not far at all from the performance of their stellar, vacuum-tube based HP 10 that our Dave Thomas reviewed.  Like it’s elder brother, the cartridge impedance loading and gain can be set on the front panel, is very quiet at all volume levels and is built to a very high standard.  The HP20’s build, performance, and feature set allow it to compete with phono preamps costing more than twice its price." Mike Wright (Click here to read teh details.)

 

 

"HP20 takes back acoustically and allows musicians to show what they can. It focuses on a realistic and clear soundstage. You can get used to this qualities of HP20 very fast. A very clean performance!" Translated from German. (Click the icon to read the full review.)