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YAQIN MC-550B 18WPC 300B x 4 Vacuum Tube Hi-End Push-pull Stereo Integrated Tube Amplifier

1 Review(s)
  • High DC voltage delay circuit to protect tubes
  • Offer a wide dynamic range at full rated output
  • Choke filtrations in high voltage DC rectifying circuit
  • Beautiful aluminium and steel heavy duty chassis, faceplate and bezels

1.Powered by four 300B king tubes and push-pull circuit to increase the output power;
2.An analog VU meter on the front panel to monitor the average of the two channel output levels;
3.Choke filtrations in high voltage DC rectifying circuit;
4.High DC voltage delay circuit to protect tubes;
5.Gold plated tube sockets;
6.Utilises the audiophile capacitors and high quality metal precision resistors dedicated for audio frequency;
7.Output transformers manufactured with Japanese silicon steel sheet and oxygen-free enamelled copper and high quality lacquer, which offer a wide dynamic range at full rated output;
8.Employs DC filaments power supply for 300B tubes to minimize humming noise;
9.Beautiful aluminium and steel heavy duty chassis, faceplate and bezels.

Technical Specifications
Tube: 300B × 4 (Output Tubes)
12AU7 × 4 (Drivers and cathode followers)
12AX7B × 2 (Voltage amplifiers)
Maximum Output: 18W × 2 (8Ω)
Output Jacks: Two channels with two groups of gold plated jacks
Speaker Output: Impedance: 4Ω and 8Ω
Input Jacks: Four groups of gold plated isolated RCA jacks
Input Sensitivity: 0.25V
Distortion of Harmonic Wave: ≤0.42% (at 12W)
Frequency Response: 5Hz ~ 73KHz (-2dB)
Signal-to-Noise Ratio: >82dB (A Weight)
Supply Voltage: AC 115V 60Hz
Power Consumption: 210W
Net Weight: 21kg (46lb)
Shipping Weight: 25kg (55lb)
Shipping Dimension: 56cm x 48cm x 40cm (22" x 19" x 16")
Dual power supply voltages are available on this unit, 115VAC for North America, 230VAC for Asia and Europe. The unit is preset in the factory to using with 115VAC power supply.

A YAQIN MC-550B unit
A Power cable
A Remote control
Hex screw drivers to mount the cover cage and to adjust bias


Packing List

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Aug 19, 2014 3:20:40 AM
what is out put power is?
Thank You
Aug 19, 2014 3:20:40 AM
Hi, the Power Output is: 18W × 2 (8Ω). Thanks.

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Babara Smith
Jun 17, 2013 1:17:29 PM
When i saw this amp, i buy it never think twice. High-quality materials to create a high-quality product, show the perfect sound touch my soul. If you want to own a new amp, i hihgly recommen this one.