Verified Supplier | Zhuhai Qi Ao Mei Xin...

Zhuhai Qi Ao Mei Xing Electronics Factory

China (Mainland) | Contact Details
Established 2006
21 years OEM
Response Rate
Company Feedback

Quick Details

  • Brand Name: Ming Da
  • Model Number: MC-5S
  • Type: Home Amplifier
  • Channels: 5
  • Place of Origin: Guangdong, China (Mainland)
  • Color: black
  • output power: 70WX2
  • Output impedance: 6Ω,8Ω
  • input impedance: 100K
  • input voltage: 1000mv

Packaging & Delivery

Packaging Details: packed in two thick and solid boxes outside and with soft and thick EPE foam inside the boxes to ensure the delivery safety.
Delivery Detail: within 15 days


Product Description



MC-5S home theatre five channels power amplifier





Output power: 70W x 5

Input sensitivity: 1000mV

Signal-to-noise ratio: 95db

Output load impedance: 6ohms, 8ohms selectable

Input jacks: 5 groups

Input impedance: 100Kohms

Frequency response: 20Hz - 60KHz +/-1db

Total harmonic distortion: <=1%

Vacuum tubes: Ming Da KT90 x 10; ECC82 x 5; ECC83 x 5

Power consumption: 620W

Volume: 73x51x38 cm (LxWxH)



Voltage Standard Available: 110V, 220V, 230V, 240V

Color Options Available: Black




Heavy weight Stainless steel and alloy plate construction  

Custom built audio and power transformers using:

Zll and H18 long grain annealed and directed steel sheets

Hand built with alll hand welding internal connections

USA made Teflon silver cable for audio signal paths

High-end parts - Philips, Panasonic capacitors, USA made resistors

Ming Da KT90 x 10 as power output tubes

Gold plated speaker out terminals

Attractive stainless steel & Plexiglas valve cover

Detachable power cord system






MC-5S Five channel on Magazine 







Packaging & Shipping

 Packaging&shipping ,Trade terms





1. FedEx/DHL/UPS/TNT for samples, Door-to-Door;

2. By Air or by Sea for batch goods, for FCL; Airport/ Port receiving;

3. Customers specifying freight forwarders or negotiable shipping methods!

4. Delivery Time: 3 days for samples; 5-25 days for batch goods.

Payment Terms

1. Payment: T/TWestern UnionMoneyGram,PayPal30% deposits70% balance before delivery.

2. MOQ: 1pcs

3. Warranty : 1 year for all the electronic components

4. Package Informations: 1 pcs per box  /The volume of the box is 60cmx56cmx35cm 


Our Services


Why Choose us?

1.We have more than 20years of experience in research and development on value amplifier  .

2.We are a factory manufacturing tube amplifier,best production capability ,best quality control, Best Service .

3.100% QC inspection Before Shippment.

4. CE/RoHS/PSE/CB listed,competitve price.

5.Hand Built and wired .





Company Information




Ming Da products from the Meixing Factory ,One of the most specially producing valve amplifier in china .The factory opened in 1991,which has a complete range of production equipment for making our own transformers and chassis components.

Our products are exported to more than 20 countries around the world. 




Our Certifications





Our exhibitions


Our Exhibitions








 Q1: Why use a tube amp?


A1:Tube amps have always been the amplifier of choice for the working musician. Musical myth has ascribed almost magical tone to them. While the results may not be entirely magic, tubes do have a sound that is different from solid state amplifiers, and one that happens to make amplified music sound better to the human ears and brain. There are lots of technical and psuedo-technical explanations for why this should be true, but there is enough solid evidence that it is a real effect to trust it. The real reason to use tube amps is simply that they sound better. For that advantage, we put up with the poor supply of parts, high prices, fragility and excess heat that they produce.

 Q2:How long do tubes last? When should I replace my tubes?


 A2:It depends heavily on use. In a closet, the tubes will last forever, of course. For practice in a bedroom a couple of times a week at modest volumes, you'll probably get five to ten years out of them. If you practice twice a week for a couple of hours at full volume and play two gigs a weekend, count on one to two years out of a set of output tubes. Note that this assumes that you got good ones to begin with and that you had them properly biased when they were put in.


Tubes wear out by sheer hours of being turned on, by how hard they're worked, how hot they get from just the heat in the box, by the number of times they're turned on and off (thermal shock). Notice that being played at maximum warp into a dummy load (or power brake, or attenuator, etc.) counts as being played hard, and that because you can't hear all the sound, you may not think that you're working them hard.


Your ears tell you when to replace them. When they no longer sound quite as punch and sweet as they used to, start thinking about changing them.

Q3:What is "bias"?

A3: "Bias" in this context refers to the amount of voltage held on the grids of the output power tubes. This controls the amount of current the output tube(s) conduct exclusive of the signal current, or, looking at it another way, the amount of overlap where both tubes are conducting simultaneously.


Q4: When should I bias my amp?


A4:You should re-bias the amp whenever you change power tubes or modify the power amp circuits.

Each power tube needs a certain bias current to keep it operating at the point where the amount and type of distortion under normal conditions is well controlled. Individual tubes vary widely in the grid bias that sets the correct idle bias current. If you change tubes or tinker with the circuit, you need to make sure the tubes are set back into operation in a way that sounds good and does not cook the tubes.

Amps typically provide only one adjustment point for bias, assuming that you will have bought matched sets of power tubes.

It is possible to modify your amp to "match" unmatched tubes by setting the bias voltage and AC drive level of each tube individually. This may require some serious soldering, though. See section D. below for a discussion on matching, and the mods section for what you have to change.



Q5:How do i bias my amp


Keep in mind that tube amps use high voltages, and they can *kill* you if you don't know whatyou'redoing. So, if in doubt, leave the job to a qualified technician.


How do you correctly bias an amp? There a few different approaches but first hook up a speaker or a passive load to the output and remove any input signals; tube amps need to have a load or they can sometimes become unstable. Check and make sure the proper size fuse is installed.




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Verified Supplier - Zhuhai Qi Ao Mei Xing Electronics Factory
China (Mainland) | Contact Details
Established 2006
21 years OEM
Response Rate
Company Feedback

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