China-HighEnd-HiFi, a subsidiary of Diamond Palace Investments Limited,

Rm. 9, 31/F., China Merchants Tower, Shun Tak Centre, 168 Connaught Road Central, Sheung Wan, Hong Kong,

Phone +852-91042374; Fax +852-25240490; Email; Web Site


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Yaqin MS-20L Highend HiFi Integrated Tube Amplifier

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Top Class Unit, push-pull circuit, 2x 50W, full Class A, switchable between Ultra Linear and Triode Mode, extra-wide Frequency Range, Head Phone Output, Remote Control



MS-20L is a 100% Class A push-pull, Integrated Tube Amplifier, based on famous EL-34B and with 6J1 as drivers and for voltage amplification what can be operated either in triode of in ultra-linear mode. It features digital channel indication, infrared remote control, front panel headphone output and external bias adjustment system.

High DC voltage delay circuit for tube protection is applied.

Tube replacements for 6J1 can be EF95, 6AK5 or 5654.

Transformers are made in STALLOY, Japanese special audio steel of 0.35 mm in thickness , wiring consists of high-strength enamel-isolated pure OFC copper applied in a special coiling process. Further components are imported and of highest quality such as electrolytic capacitors, audiophile capacitors, high-quality metallic resistors, imported motorized volume potentiometer, all packed into a rigid, well-shielding and very durable enclosure.

Sound quality is excellent full in Class A, warm, silk-like smooth, but also precise, transparent and powerful over whole very wide frequency range with high dynamics, realistic, without coloration, music background calm and noise on very low level.

Power supply is selectable between AC 110 V / 60 Hz and 240 V ±10% / 50Hz.

Technical Data

Output Power:
Frequency Response:

Input Sensitivity:

No. of Inputs:

Output Impedance:

Headphone Output:

Remote Control:
Power Supply:



 2x 50 (80) W
Hz - 75KHz ±2 dB

1.6% at 1 kHz

>88 dB, Class A

< 0.23 V, 1 kHz

4 groups, gold-plated

4Ω, 8Ω

32 Ω, recommended

4x EL34B, 8x 6J1


AC 110 V / 60 Hz, 220-240  V / 50Hz

Silver / Black

320×420×210 mm, W x D x H
approx. 21 kg

Delivery Volume

Brand-new, original packing, once opened for check and short test, including the following items:

1 amplifier, 1 power cable, 1 remote control, 2 batteries AAA, hex screw driver for BIAS adjustment,

1 original operating manual.


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The above offer regarding design, texts, graphics, photographs, colors and so on is protected by  ©Copyright. Use in any form, also in parts only by third parties not having our approval in written form is prohibited and might be reason for legal action from our side.


Diamond Palace Investments Limited

Copyright © 2004
Last modified: 17/12/2014