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It is currently 18 Mar 2019, 09:39

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PostPosted: 16 Mar 2019, 18:21 
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Joined: 06 Apr 2009, 10:08
Posts: 1554
Location: US Pacific Northwest
So I was looking for a small fairly robust solid state amplifier module to replace a 1980's vintage boom box for playing music in my wood shop. The environment is VERY dusty so sealed enclosures are a must. As such I needed something small, fairly efficient, and easy to work with. So I went to Parts Express and ordered a Sure Audio AA-AB32231 2x8W Class D amplifier module. This module uses a Texas Instruments TPA3110 series chip. The board looks like this:
Attachment:
side3_1.jpg
So being a typical engineer, I immediately took it out of its box and wired it up. To say I was impressed is an understatement. Here it is just sitting on my desk playing it's first music:
Attachment:
First Sound - Norah Jones.jpg
The sound produced by this little amplifier with just a wall-wart and an iPod input is really quite excellent. Even more so when you realize it only cost $15.98 (USD) each.

The unit from Parts Express comes with screw terminals for inputs, outputs, and power as well as standard power connector and 3.5mm stereo jack. It really is a very nice little module.

In a little box in my shop with a couple of switchable inputs, this is going to make a really nice little amplifier. I'll post some pictures as soon as I get it boxed up.


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PostPosted: 17 Mar 2019, 17:50 
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Joined: 04 Jun 2008, 20:59
Posts: 3932
Location: Arizona, USA
Hi, Yes indeed. The current crop of mini class D amps are quite excellent. Cheap, efficient and decent sounding. I only had one with issues. It was a 2.1 version that I wanted to use with a TV. Unfortunately it was not well filtered and put crud on the grounds and in turn the CATV line. I got a visit from the CATV service folks. :eek: They tracked it down as it was causing interference on the cable all over the neighborhood. Funny thing is it didn't cause any problems with my gear. Go figure. Needless to say I canned it. Most don't seem to have this problem fortunately. PE has several really good amp modules and I highly recommend them.

Good listening
Bruce

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