is there a chip amp that will give me 50 watts of power

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#23
raypalmer said:
For a first timer (like I was until like two months ago) I'd strongly recommend an LM3886 or 3875.

Simply because if it doesn't work the problem can be easily diagnosed from a photograph on a forum. There are only like 8 parts per channel afterall. Just use a big chunk of something for your heatsink.
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Rainwulf said:
I agree. Easy to build, lots of kits. Nearly indestructible with a good enough heatsink, lots of protection, and as long as you keep them cool, fantastic audio quality.
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Problem is, if it is used frequently, it would cost much more to operate than a digital (pure or hybrid) of the same ratings. And in a hot climate, it would heat up the room.

Digital (especially hybrid) has advanced to the point where the increased complexity is more than offset by savings in smaller power supplies and heatsinks even at low power levels.
 
#25
Minion said:
The TDA7293 can put out well over 50w (100W) and to me personally I like it"s sound better than the LM3886 ...The problem is it has a a few more pins and pre-made PCB"s are harder to find...

😀
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That chip supports dynamic supply voltage, but why bother? It's still going to be significantly less efficient than a hybrid digital of the same ratings.
 
#26
Hi, star882,

merickrc said:
i am looking to build a chip amp that will power these speakers http://www.zaphaudio.com/BAMTM.html is there a chip amp that will give me 50 watts of power per chan
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Did you look at the speakers? They were designed for operation with tube amplifiers. Even a chipamp may not be a perfect match for them. A TDA8920 with 10 % THD at 45 W, a TPA1517 with 10 % THD at 6 W, or the coldamp modules with 0,5 % THD at 400 W surely are no match at all. Efficiency? Nice to have, but not too high on the wishlist for an audio amplifier.

Regards
David
 
#28
#29
I have to admit that like David I find the interest in power efficiency rather odd... Out of all the things we use that suck up scads of energy, cars, computers, a/c, heating, clothes driers, ovens and so on the relatively tiny consumption of an audio amp is a concern?

Also, like David, I think those speakers are going to be totally wasted on SS. It'd be like buying the world's best bicycle and putting a motor on it. It won't be a very good motorbike...
 
#30
Hi Ttan98,

Yes, I have a TA2022. It's not working yet though. The board was given to me when I purchased some other stuff from CNX. It is an older design and when I first hooked it up had a fair amount of noise. I am waiting on some instructions on how to wire the inputs off-board directly to the chip. Will keep the CNX thread posted on my progress.

The TA3020 amp I built is sounding excellent 😉

cheers,
col.
 
#31
raypalmer said:
I have to admit that like David I find the interest in power efficiency rather odd... Out of all the things we use that suck up scads of energy, cars, computers, a/c, heating, clothes driers, ovens and so on the relatively tiny consumption of an audio amp is a concern?

Also, like David, I think those speakers are going to be totally wasted on SS. It'd be like buying the world's best bicycle and putting a motor on it. It won't be a very good motorbike...
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If the amplifier is large, the savings in power supply and heatsink alone would more than make up the additional cost of the circuit. So you get a cost savings just from the start, before you even turn it on. Additional savings afterwards is just a bonus. And why say no to higher efficiency when it comes at a lower price?

Although off topic, if you add a motor to a bicycle, you'll be able to go faster than without it. If we let X be pedal power and Y be motor power, X+Y>X . However, a cheap brush DC motor would be out of place on a good bicycle. A high quality brushless DC motor with a LiFePO4 battery pack, however...

Back on topic, a good compromise is a common analog amplifier with dynamic supply voltage, which would still be easy to build (compared to SMD chips) and can still get good efficiency. The power supply voltage regulation circuit can also be tied into an auxiliary potentiometer in order to reduce supply voltages at low volume settings.
 
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