How is this possible?

I guess this probably produces single digit watts but even the case would cost more if made here. Are the parts fake? Electrical safety non-existent? Is there scope to modify?
 

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I often buy Chinese aluminum boxes for various devices, mostly of smaller dimensions. The quality is better than the price. Postage is often more expensive than the box. Capacitors and the like are extremely cheap in China, especially in larger quantities. The price of work is unrealistically low, so it is possible to get such amplifier for that money. I don't know how long it will last and how it really works. That MF A1 was not a reliable device either.
 
I think possible, I was a skeptic on JL for PCB's. I just could not believe the pricing was possible. But I had a large board (50 sq inch) that was going to be crazy expensive in the US, 5x50 or 250 for 3 copies. The order thru JL was 15 + 22 for shipping for 5 copies. So about 1/5th including shipping and less than 1/10th for actual product. The boards look just as good as the US ones I've had made and ironically, they beat the US company in terms of time to my doorstep. The US supplier usually took a week to schedule it to production and a couple days to ship. JL produces it practically overnight and shipping took around 5 days. I still don't have a clue how they can do it. 5 blank boards I think would cost more than 15 here. And this is prototypes. I've never checked but I bet they give a discount for volume.
 
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Electrical safety non-existent?
Hi,
you are right. The chinese do not know what to do with the PE ( Protected Earth). I have bought two Audio Technica Headphone Clones at different companys on Aliexpress and the housing was connected to transformator ground. The PE only was connected to the transformator shielding. Dangerous....and you get some hum...
If someone has no knowledge about electric or having a friend that knows about...don't buy such chinese assembled devices. Perhaps next month the capacitors have a different colour. The chinese take what components they have in stock and try to save money.

Greets
Peter
 
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I guess this probably produces single digit watts but even the case would cost more if made here.
How is this possible? It's made in China silly.

  • A large well established industrial complex.
  • Economies of scale.
  • Cheap parts.
  • An almost unlimited supply of cheap labor.
  • Sell direct, no dealer network with all the markup (already covered)
  • I'm probably forgetting many others.

jeff
 
Inside reveals a throwaway design similar to e.g. chinese routers or switches. And when it breaks it does not even work as a boat anchor.
https://www.audiosciencereview.com/...ping-b100-amplifier-review.57036/post-2083695
Yes I agree Martti, that is a serious design deficiency. 'Cannot be used as boat anchor' 😎

I hadn't seen this inside photo. They claim is it a class B amp (not AB), and I heard from others they developed a special feedback arrangement to beat the crossover distortion. I wonder if it is a variant of Current Dumping? That would help to keep idle dissipation in check.

Jan
 
Not to surprising.
You can actually make a 20/25 watt amplifier even cheaper than that.
Specially such a simply design with such few components.

2 channels with no features.
Todays world, you can now see the actual value.

People pay up to 3 grand for a pair of vintage shoes.
At the end of the day it still only contains 7 dollars of material.

Any additional value is subjective and up to the buyer
to make up a reason for the price after that.

People had amazing reviews of the Gain Card.
2 grand for a 4 dollar chip amp.
Heck at least the distortion is likely lower
and twice the power.
 
Yes I agree Martti, that is a serious design deficiency. 'Cannot be used as boat anchor'
Circular economy is the future. There needs to be an alternative usage when (not 'if' in this case) it breaks otherwise it will just end up in a landfill.

My Revox A740 is 45+ years old and still going strong. It probably weighs more than my boat anchor.
 
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