TPA3116

For the three and more legged things
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Ali Tait
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Post by Ali Tait » Sun Jun 29, 2014 10:59 am

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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Post by Mike H » Sun Jun 29, 2014 11:52 am

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

Image

.. the world will end ...
 
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pre65
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Post by pre65 » Sun Jun 29, 2014 12:08 pm

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 ?
People are like stained-glass windows. They sparkle and shine when the sun is out, but when the darkness sets in, their true beauty is revealed only if there is a light from within
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pre65
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Post by pre65 » Thu Jul 31, 2014 5:53 pm

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

http://www.ebay.co.uk/itm/TPA3116-Induc ... 43ca0432d4
People are like stained-glass windows. They sparkle and shine when the sun is out, but when the darkness sets in, their true beauty is revealed only if there is a light from within
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G-Popz THE easy listening connoisseur. (Philip)

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Paul Barker
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Post by Paul Barker » Thu Jul 31, 2014 7:06 pm

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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Post by pre65 » Thu Jul 31, 2014 7:52 pm

Don't know Paul. :?

Does the data sheet say ?

http://www.ti.com/lit/ds/symlink/tpa3116d2.pdf
People are like stained-glass windows. They sparkle and shine when the sun is out, but when the darkness sets in, their true beauty is revealed only if there is a light from within
Dr Elisabeth Kubler-Ross

G-Popz THE easy listening connoisseur. (Philip)

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Paul Barker
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Post by Paul Barker » Thu Jul 31, 2014 8:10 pm

I'll have to try it and see.

At least the load of 6 ohm should be fine.
I can do it right or I can do it now, but I can't do it right now.

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pre65
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Post by pre65 » Thu Jul 31, 2014 8:12 pm

If you can try it just as an amp before you try and blow it up I would value your opinion. :wink:
People are like stained-glass windows. They sparkle and shine when the sun is out, but when the darkness sets in, their true beauty is revealed only if there is a light from within
Dr Elisabeth Kubler-Ross

G-Popz THE easy listening connoisseur. (Philip)

chris661
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Post by chris661 » Sat Aug 02, 2014 9:10 pm

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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rowuk
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Post by rowuk » Sat Aug 02, 2014 9:55 pm

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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Post by pre65 » Sat Aug 02, 2014 10:29 pm

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. :)
People are like stained-glass windows. They sparkle and shine when the sun is out, but when the darkness sets in, their true beauty is revealed only if there is a light from within
Dr Elisabeth Kubler-Ross

G-Popz THE easy listening connoisseur. (Philip)

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Paul Barker
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Post by Paul Barker » Sun Aug 03, 2014 8:19 am

rowuk wrote:
5dB down at 100kHz. It is unbelievable how inexpensive this amp is.
Indeed.
I can do it right or I can do it now, but I can't do it right now.

chris661
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Post by chris661 » Wed Aug 06, 2014 5:10 pm

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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Post by pre65 » Wed Aug 06, 2014 6:10 pm

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:
People are like stained-glass windows. They sparkle and shine when the sun is out, but when the darkness sets in, their true beauty is revealed only if there is a light from within
Dr Elisabeth Kubler-Ross

G-Popz THE easy listening connoisseur. (Philip)

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pre65
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Post by pre65 » Tue Aug 12, 2014 8:47 am

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. :)
People are like stained-glass windows. They sparkle and shine when the sun is out, but when the darkness sets in, their true beauty is revealed only if there is a light from within
Dr Elisabeth Kubler-Ross

G-Popz THE easy listening connoisseur. (Philip)

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