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Post by puffin on Feb 18, 2017 20:08:41 GMT
My mate wanted an amp to use with his PC. Space is at a premium and I suggested a small Class D. I made loads of them years ago and said I thought I might have some boards knocking about.   I tried in my system and I had forgotten how good these little things were. I see boards similar to this are about £9 now, I am sure I paid more than that. |
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Post by John on Feb 18, 2017 21:30:02 GMT
Used with high efficency speakers a very cheap way of getting decent sounds
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Post by ChrisB on Feb 18, 2017 23:47:51 GMT
What's the total cost of a thing like that then, Rob?
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Post by Slinger on Feb 19, 2017 0:56:21 GMT
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Post by puffin on Feb 19, 2017 7:11:13 GMT
What's the total cost of a thing like that then, Rob? Well, having been asked and totting it all up.......a bit more than I expected. I built it for nowt as my mate has done a lot of computer based stuff for me over the years. I've shed loads of bits so all he had to buy was the case. However here is a breakdown :- Board : £9 - 10 Binding posts £5 - 8 RCA sockets £3- 5 Case £12 Then you need a switch and DC input socket and a 12v power supply. I am sure there are fully built Tripath TA2024 chip amps on ebay for less. |
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Post by jandl100 on Feb 19, 2017 7:46:43 GMT
I like those little class D t-amps a lot. A naturally musical sound to my ears when linked to a speaker presenting a suitably friendly load. They do vary, ime, between laidback (e.g. TA2024 chip) and upbeat and remarkably sprightly and transparent (e.g. TA2020). I have a couple of TA2020 class D amps always close at hand for when the urge takes me.  |
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Post by puffin on Feb 19, 2017 9:52:49 GMT
Yes Jerry, they all have their own flavour. I have tried TA2024, TA2020, TPA3116 (raved about, but not really my cup of tea) A Sure 100w per channel board with fan (which I removed) not sure of the chipset but sounds good and an STA508, that I got years ago, checked it worked and never did anything else with it. Oh and the 2024s that I blew up in the early days....DON'T SHORT THE SPEAKER OUTS!
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Post by MartinT on Feb 19, 2017 10:01:29 GMT
The TA2021 is a good chip as it takes up to 14V power and pushes about 25Wpc. I made a linear PSU for it from a Paul Hynes module. It drives my Fostex based PC speakers very well and is quite musical in delivery.
As with all class D, don't push it too hard as performance at the ragged limits is not nice.
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