TPA3116

For the three and more legged things
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Ali Tait
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#16

Post by Ali Tait »

pre65 wrote:OK, after a few hours of playing various music I must say I really do like this little chip amp.

True it has got a very low noise PSU, and it is being fed by my Audionote clone (ish) valve pre, but nevertheless, for the price, it's an absolute bargain. :D

I'm even thinking of getting another one and trying bi-amping on the baffles, perhaps even going to an active crossover. :shock: :lol:

What type of crossover do you use Ali ?

I'd really love a 2nd opinion on this. :)
I use this one Phil-

http://www.minidsp.com/products/minidsp ... inidsp-2x4

You can get it even cheaper if you buy it without the box. You need to buy the software and use your pc to set it up, but it's cheap enough. You can also buy a calibrated measuring mike and download some free software to measure your speakers if you're so inclined. Needs a power supply too, but that won't be a problem. I run mine from a battery, which I also use to run the chip amp. Try a battery on the amp Phil, made a good improvement over the power supply I was using before.
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Mike H
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#17

Post by Mike H »

Oh em gee Phil is converting to SS chip amps ...

Image

.. the world will end ...
 
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pre65
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#18

Post by pre65 »

Mike H wrote:Oh em gee Phil is converting to SS chip amps ...
Not quite, I've invested a small fortune in bits to "upgrade" the 833 amps, and I have the GK-71 power supply to rebuild in choke input mode. :wink:

But, no doubt, my chip amp is seriously good value for money. :lol:

If you have any spare time soon Mike, why not pop over and have a listen ?
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pre65
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#19

Post by pre65 »

The Ebay seller is selling them even cheaper now. :shock:

http://www.ebay.co.uk/itm/TPA3116-Induc ... 43ca0432d4
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Paul Barker
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#20

Post by Paul Barker »

OK you've done it to me.

I have ordered one. Any idea what the bandwidth is? Is it limited to audio frequencies or will it give most of it's power up to 50khz?

Thinking of it to heat 801a filaments at 50khz AC sign wave generated by my Hameg pure sign wave generator. Compared to lighting transformer. Compared to "quality" DC. Can't see it likely I shall manage LF AC heating as per Rosenblit becaue I don't know what special things he does to prevent the woofers destroying themselves punching the air at 10hz.

For a practical trial.
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pre65
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#21

Post by pre65 »

Don't know Paul. :?

Does the data sheet say ?

http://www.ti.com/lit/ds/symlink/tpa3116d2.pdf
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Paul Barker
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#22

Post by Paul Barker »

I'll have to try it and see.

At least the load of 6 ohm should be fine.
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pre65
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#23

Post by pre65 »

If you can try it just as an amp before you try and blow it up I would value your opinion. :wink:
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chris661
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#24

Post by chris661 »

Just ordered one of the amps on the first page. First will try a 12v 2A wall-wart, then a 12v 5A laptop-style supply.

Will let you know how it fares.
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#25

Post by rowuk »

pre65 wrote:Don't know Paul. :?

Does the data sheet say ?

http://www.ti.com/lit/ds/symlink/tpa3116d2.pdf
5dB down at 100kHz. It is unbelievable how inexpensive this amp is.
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pre65
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#26

Post by pre65 »

chris661 wrote:Just ordered one of the amps on the first page. First will try a 12v 2A wall-wart, then a 12v 5A laptop-style supply.

Will let you know how it fares.
Please do Chris. :)
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Paul Barker
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#27

Post by Paul Barker »

rowuk wrote:
5dB down at 100kHz. It is unbelievable how inexpensive this amp is.
Indeed.
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#28

Post by chris661 »

Right then, the amp arrived a couple of days ago.

Its final destination will be in a pair of little computer monitors using a Visaton FRS8M in a transmission-line enclosure (yet to be built).

In the mean-time, I have the Behringer monitors and a pair of high-sensitivity 12" two-way speakers that I can try it on. The former will give a fair idea of what the amp does at high power, the latter will show up any issues at v.low power.

The circuit itself looks nicely done, so I'm looking forward to attaching some connectors and firing it up.

Chris
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pre65
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#29

Post by pre65 »

Well done Chris, not many wires to connect.

The 3 pin input connectors, I used a plug and wires from a PC fan I had laying about, but had to bodgeify it a little. :wink:
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pre65
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#30

Post by pre65 »

The chip amp is still sounding good. :D

Andrew I came round yesterday for a chinwag, and we had the chip amp working with the squeezebox on random. To be honest, the chip amp sounded better than the Steptoe amp, and in some respects was as good as the GK-71, and a bit better in the bass,

I think Andrew is going to order one now. :)
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
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