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Class D Switching Power Amplifiers and Power D/A conversion

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Old 29th March 2009, 01:00 AM   #11
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I have been playing with the Sure Electronics 2024 based modules....

I would say they are a match for your Nad amp straight out teh bubbl wrap. But with a tiny bit of love and care, they will blow it out the water.

I have been playing with mine with Mission 753 floorstanders. One 10w amp can make them sing. Bi amping and they sing better. I have 5 of them to give 10 channels. I must get round to boxing them up.

Sure does some nice smps power supplies, but another source for these is Circuit Specialists

There are so many variants of the tripath boards around and I dare say they are all very good. I like the sure boards cause there is still some perfecting you can do to them.

I have detailed some modifications in the links in my sig
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Old 29th March 2009, 01:40 AM   #12
john65b is online now john65b  United States
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Hopefully Cirrus Logic, who bought the intellectual property of Tripath when Tripath went belly up (I have 2000 shares of worthless Tripath in my brokerage account...) will continue offering the chipsets....

Haven't heard much about current Tripath inventory issues with TA2020, TA2022, TA2024, TA3020 etc...no indications of shortages and still seem to be ubiquitous....
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Old 29th March 2009, 01:47 AM   #13
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hi mate thanks thay are nice and fair priced just had a look what do you recon to the tri path board on ebay i have put item number if you want to have a look were do you get your boards from thanks
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Old 29th March 2009, 02:07 AM   #14
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I got mine from Sure electronics...

Here it is with included Power brick

And without

The deal with the brick included is a good one...
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Old 29th March 2009, 02:10 AM   #15
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looking at the ebay one, it looks more similar to the Sonic Impact amps. Its of course very hard to tell from a photo. Chap price, I would e willing to bet the volume pots wont be the most accurate.

Probably has potential though.. Most of the mods I have done will be possible I guess.
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Old 29th March 2009, 02:35 AM   #16
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how many do you recon i will need i like to feel the music in the funiture if you know what i mean would you go for the ones on ebay or the sure ones sorry to be a pain but i dont real know much about these amps cant be be that hard to work with though theres nothing in them thanks steve
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Old 29th March 2009, 11:04 AM   #17
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Not sure about how sturdy tour furniture is. Bear in mind that at above 10w these things distort. But with sensitive speakers you can get a fair volume from them.

Now as far as how many? I am going to be modifying my speakers to accept more inputs. You can't just double these things up by bridging them or running them in parrallel to each other. That has already been done on the chip.

There are more powerful class f amps out there, not sure how they compare quality wise to the TA2024 or 2020 chips.
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Old 29th March 2009, 11:16 AM   #18
ttan98 is offline ttan98  Australia
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JUSTBLAIR,

I sent you a private mail asking you on how to reduce the noise output. Any suggestion/answer is welcomed.
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Old 29th March 2009, 11:21 AM   #19
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I mailed you back mate perhaps the spam filters have it.. Here was my replay

On the Sure amps the section of the amp on the speaker output side of the board is a low pass filter. It removes high frequency switching noise that is created by the fact that class D amps use switching which causes high freq noise. You can alter component values in this filter adjust its slope. I haven't tried it yet.

What does your noise sound like? Is it standard line noise? Soentimes re-routing signal cables can make a difference here. Also making sure that the signal ground is actually grounded somewhere. (not the speaker ground though, that must not be attached to actual ground) In other amps that I have played with the signal ground meets power ground in the module. Not so with the sure amp. This caused my Pedja buffer's not to work (motorboating noises) on the first attempt


Blair
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Old 29th March 2009, 01:17 PM   #20
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hi think i will just get one and see how it sounds dont get me wrong im not just after power i would like a lot more datail and a better sound stage and thats what i hear you get with these amps i will let you know which one i get
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