TPA3116D2 Amp

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#5,741
I this OK?
Green???
 

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#5,742
None of these(green) are related to outputsnubbermod.
Green 1 is interesting but might just be for voltage output??, I think green 2 could help, green 3 is lost because 104 is so far from tpachip it is useless, but they also say through hole components are useless for high 'speed'.
 
#5,744
Now I have to choose a good power supply. Which do you suggest?
Click to expand...

Many people are using cheap laptop bricks in the 12v to 19v range. I have used these for non critical listening and they sound fine. But if you want the best, a good regulated PS like Astron is the way to go. I have a 12v/20a model and the difference was not subtle (better bass, more detail, and wider soundstage). I have done all of Rhing's mods minus the input transformers and find the combination totally satisfying. In fact, my urge to upgrade on the amp end of things has stopped.
 
#5,746
Power supply voltage rating for best sound

a loooong way back in this thread,

someone reported superior results around 19-21 V.
(I think the comparison was among fairly cheap laptop supplies)

many of the better-quality SMPS supplies mentioned more recently
(even the adjustable ones) fall outside this range.

maybe the higher-quality supplies give better results regardless of specific voltage range?

skip it if this has been covered in detail already,
my apologies if I haven't been following closely enough recently.
 
#5,747
Quard said:
a loooong way back in this thread,

someone reported superior results around 19-21 V.
(I think the comparison was among fairly cheap laptop supplies)

many of the better-quality SMPS supplies mentioned more recently
(even the adjustable ones) fall outside this range.

maybe the higher-quality supplies give better results regardless of specific voltage range?

skip it if this has been covered in detail already,
my apologies if I haven't been following closely enough recently.
Click to expand...

I have had better results with linear supplies, I aim for 21v but I don't think it matters too much. Personally prefer a purpose built supply in the same case as the amp to reduce cable runs etc., that is how most amps are built rather than the PSU being a tack on after thought.

There was some earlier discussion around SMPS supplies purpose built for hifi use but they are often not at an appropriate voltage for the 3116.
 
#5,748
breeze 2.1 TPA3116 amp, "FS_tone" knob frequency response

Hi,

My breeze 2.1 TPA3116 amp showed up a few days OK, it seems fine.
As I got it as a "picnic amp" to drive some old Pioneer car speakers and car sub I got from ebay I'm not concerned with tweaking it yet, but I did want to figure out what the "FS_tone" knob does, so I graphed the frequency response using Room EQ Wizard and a voltage divider on the speaker out.

Here are my results:
main.php

full res: http://pix.minirig.org.au/main.php?g2_view=core.DownloadItem&g2_itemId=6870&g2_serialNumber=1

Soundcard used was a behringer UCA-202.
I used a 27K & 1K resistor as the voltage divider on the output to get the output from the amp, then isolated from the soundcard using an old DI box (transformer).
Sub used is a Pioneer TS-W254C (4 ohm car sub) in a 33L sealed box. Using this as I got it for $3 on ebay with a busted plate amp, which I have discarded 🙂

PSU used was a 20VDC 50W laptop type PSU.

I just gradually nudged the FS_tone pot through it's range of motion for each measurement, so the increments arent exact, but at least it gives you the idea of what the filter is doing. For the highest 1/3 of the knob range it does barely nothing, which may be why other posts reporting it doesn't work. The strange little notch in response appeared at the 3rd-7th lowest "nudges" then went away.

measurement rig:
main.php


main.php
 
#5,749
Thanks, ChrisMmm!

And thanks to zog666 (that's just fun to type),
answers another question I had a long time ago--
for those of us thinking about using a 2.1 to drive a 2-way F.A.S.T.,
it's really useful info for that particular model.

A lot of you know much more about this than I do,
does it look "usable" as a mid-fi xover in the 200-400 Hz region?
(when knob turned almost all the way to the right, otherwise corner not sharp enough)

or not, really? (maybe the slope at freqs above -3dB point is just never steep enough?)
of course, you'd need an appropriate high-pass filter on the full-range side of things.
 
Last edited:
#5,750
birca1987 said:
Try this one on ebay 221556432135
Click to expand...
ok but the best performance I read it's for about 21V...Is there the possibility to change the output voltage?

Doctor J said:
Many people are using cheap laptop bricks in the 12v to 19v range. I have used these for non critical listening and they sound fine. But if you want the best, a good regulated PS like Astron is the way to go. I have a 12v/20a model and the difference was not subtle (better bass, more detail, and wider soundstage). I have done all of Rhing's mods minus the input transformers and find the combination totally satisfying. In fact, my urge to upgrade on the amp end of things has stopped.
Click to expand...

I think that a laptop power supply wouldn't be the best choice.
First: the component are not so good
Second: is the voltage settable to 21V?
 
#5,753
Quard said:
Thanks, ChrisMmm!

And thanks to zog666 (that's just fun to type),
answers another question I had a long time ago--
for those of us thinking about using a 2.1 to drive a 2-way F.A.S.T.,
it's really useful info for that particular model.

A lot of you know much more about this than I do,
does it look "usable" as a mid-fi xover in the 200-400 Hz region?
(when knob turned almost all the way to the right, otherwise corner not sharp enough)

or not, really? (maybe the slope at freqs above -3dB point is just never steep enough?)
of course, you'd need an appropriate high-pass filter on the full-range side of things.
Click to expand...

I used it in a FAST successfully with a PRV 5MR450NDY in a 12 in wide OB. The natural XO freq was 340Hz and it matched my sub and tops very well. Here is result.
429053d1405682518-cheap-fast-ob-literally-slob-response-5mr450-ndy-fast-1m-meas.png


More info here:bhttp://www.diyaudio.com/forums/full-range/249984-cheap-fast-ob-literally-39.html#post3995444
 
#5,754
zog666 said:
Hi,

My breeze 2.1 TPA3116 amp showed up a few days OK, it seems fine.
As I got it as a "picnic amp" to drive some old Pioneer car speakers and car sub I got from ebay I'm not concerned with tweaking it yet, but I did want to figure out what the "FS_tone" knob does, so I graphed the frequency response using Room EQ Wizard and a voltage divider on the speaker out.

Here are my results:
main.php

full res: http://pix.minirig.org.au/main.php?g2_view=core.DownloadItem&g2_itemId=6870&g2_serialNumber=1

Soundcard used was a behringer UCA-202.
I used a 27K & 1K resistor as the voltage divider on the output to get the output from the amp, then isolated from the soundcard using an old DI box (transformer).
Sub used is a Pioneer TS-W254C (4 ohm car sub) in a 33L sealed box. Using this as I got it for $3 on ebay with a busted plate amp, which I have discarded 🙂

PSU used was a 20VDC 50W laptop type PSU.

I just gradually nudged the FS_tone pot through it's range of motion for each measurement, so the increments arent exact, but at least it gives you the idea of what the filter is doing. For the highest 1/3 of the knob range it does barely nothing, which may be why other posts reporting it doesn't work. The strange little notch in response appeared at the 3rd-7th lowest "nudges" then went away.

measurement rig:
main.php


main.php
Click to expand...

Nice work! Thanks for doing this. It confirms why a XO freq of 340Hz was what I got - that is -6dB point.
 
#5,755
xrk971 said:
Nice work! Thanks for doing this. It confirms why a XO freq of 340Hz was what I got - that is -6dB point.
Click to expand...

No worries, was interesting, and now I know the limits I'm working with. I'm using some Pioneer 6x9 car speakers that seem to tail off @ 200hz as satelites and it sounds OK with the SF_Tone dial backed off a bit, but I have yet to break out the microphone and measure the whole lot.
With the 4 ohm satellites I could just get some 100uf cap so they crossover @ approx 340hz as one option for this little battery powered picnic setup.
IMG_5283.jpg
 
#5,757
mls said:
Search eBay for "Valab 23 step attenuator 50k log"
Well made with quality smd resistors for around $30 shipped.
Click to expand...

I would get a 10k myself to better interface to the 30k impedance of the amp (in fact I do have the above mentioned Valab attenuator in one of my 3116 amps - 10k version). Opinions vary on this and there has been discussion earlier in the thread.
 
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