hi , i am using 19v good laptop psu with this board , i put it all in old logitech speaker box and is working fine. but i have problem when pots are in middle position it produces some quiet whining sound has anyone had this problem yet?
sorry if answered before.
sorry if answered before.
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think your right and what ive ordered...because thats all that was offered😀
went for these
Kemet 0805 C 100nF Ceramic Multilayer Capacitor, 50 V dc, +125°C, X7R Dielectric, ±10%
regards
smithie
went for these
Kemet 0805 C 100nF Ceramic Multilayer Capacitor, 50 V dc, +125°C, X7R Dielectric, ±10%
regards
smithie
Sound wise it really doesn't matter what exact value you are throwing in there. 10-220nF is all good. Main purpose is to keep radiation low on power-rails. It just needs to be low esr/impedace with low inductance connection due to distance.
For single ceramic deoupling on each side 2.2uF gave smooth looking scope pictures earlier in thread.
well ill solder back on the caps that i ham fisted took off and then give it a listern to make sure im back in the original ball park🙂
i will take up doctormords advice and invest in another so i can run some side by side listerning tests when trying some mods.
out of intrest if 2.2uf gave a better smoother trace on the scope,then do you guys feel a oscon of 330uf value will still give some of that improvement,or would it be worth while just going for a bigger value 0805 cap in that position to start with? if so what do you guys suggest for there...without getting at each others throats of course😀
all the best
smithie
i will take up doctormords advice and invest in another so i can run some side by side listerning tests when trying some mods.
out of intrest if 2.2uf gave a better smoother trace on the scope,then do you guys feel a oscon of 330uf value will still give some of that improvement,or would it be worth while just going for a bigger value 0805 cap in that position to start with? if so what do you guys suggest for there...without getting at each others throats of course😀
all the best
smithie
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Noone said 2u2F gives "smoother" trace, but "also smooth". You'll have to keep the dc-bias in mind. A 2u2F 50V in 0805 will not have this rated capacitance at i.e. 25V - it's more like ~1uF (for X7R). But, as said, the exact value (like in datasheet) is not needed.
So going with the 100nF is just fine. To have everything perfectly matched you need to analyse the whole system and/or especially the system between the bulk-caps and the IC power-input. stray/trace-inductance is a point to look at and thats what the small MLCCs are for. As your traces inductance will limit the dI/dt those MLCCs need to compensate for that. Limited dI/dt results in non-optimal switching-rise-times and radiation due to modulation.
Practically i would say, you wont hear a difference between a 10nF and i.e. 1uF, so if there's some capacitance, all is good.
Using i.e. Oscons as bulk/ or local-decoupling caps "can" improve sound-performance at very high levels, but this also depends on the power-supply. Having a top-notch, fast, low impedance power-supply wouln't necessarily need thos ultra-low-esr caps. Beside this, the BTL configuration tracks most of those power-supply-problems due to the way how it works.
If you want to cap-roll, best way to do is to desolder and measure the old ones for ESR, capacitance, dissipation-factor as for the new ones as well. (And then hearing them blind without knowing which is which)
But first, you'll need to blind-hear your power-supplies... 😀
Only a mindbias-free listening experience can tell you a somewhat objective opinion/impression.
Most ready-made things aren't getting improved, they get altered.. (to a better subjective impression)
Ya.. ^^
So going with the 100nF is just fine. To have everything perfectly matched you need to analyse the whole system and/or especially the system between the bulk-caps and the IC power-input. stray/trace-inductance is a point to look at and thats what the small MLCCs are for. As your traces inductance will limit the dI/dt those MLCCs need to compensate for that. Limited dI/dt results in non-optimal switching-rise-times and radiation due to modulation.
Practically i would say, you wont hear a difference between a 10nF and i.e. 1uF, so if there's some capacitance, all is good.
Using i.e. Oscons as bulk/ or local-decoupling caps "can" improve sound-performance at very high levels, but this also depends on the power-supply. Having a top-notch, fast, low impedance power-supply wouln't necessarily need thos ultra-low-esr caps. Beside this, the BTL configuration tracks most of those power-supply-problems due to the way how it works.
If you want to cap-roll, best way to do is to desolder and measure the old ones for ESR, capacitance, dissipation-factor as for the new ones as well. (And then hearing them blind without knowing which is which)
But first, you'll need to blind-hear your power-supplies... 😀
Only a mindbias-free listening experience can tell you a somewhat objective opinion/impression.
Most ready-made things aren't getting improved, they get altered.. (to a better subjective impression)
Ya.. ^^
Hi!
What do you think about these boards for the power supply:
Assembled S11 Super Linear Regulated Power Supply Board LPS PSU | eBay
ZEROZONE Assembled Ultra Low Noise linear Power supply board LPS board-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
http://www.ebay.com/itm/121291977849?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%
Upgraded Power 02 Adjustable Linear Power Supply Kit for Preamp DIY L1510 2 | eBay
New LM723 UA723 Linear Adjustable DC Regulator Power Supply Board | eBay
How to choose the best one for the money?
Thank you!
What do you think about these boards for the power supply:
Assembled S11 Super Linear Regulated Power Supply Board LPS PSU | eBay
ZEROZONE Assembled Ultra Low Noise linear Power supply board LPS board-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
http://www.ebay.com/itm/121291977849?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%
Upgraded Power 02 Adjustable Linear Power Supply Kit for Preamp DIY L1510 2 | eBay
New LM723 UA723 Linear Adjustable DC Regulator Power Supply Board | eBay
How to choose the best one for the money?
Thank you!
hi dotormord
thank you very much for your very detailed response,insight and knowledge.and the tips and guidance is also very much appricated
and without starting a war over whats best for this style of amp...ie switch mode or linear snake69fast post above is very timely as im looking for a decent surply at around 19volts,(not sure what amperage is needed with that) to mate with this amp so i can put it all in one box and do away with at least one of my black boxes hanging off my extension lead😀😀
regards
smithie
thank you very much for your very detailed response,insight and knowledge.and the tips and guidance is also very much appricated
and without starting a war over whats best for this style of amp...ie switch mode or linear snake69fast post above is very timely as im looking for a decent surply at around 19volts,(not sure what amperage is needed with that) to mate with this amp so i can put it all in one box and do away with at least one of my black boxes hanging off my extension lead😀😀
regards
smithie
just noticed that...the amb original looks really good,thinking of getting a amb board to build to power my amp,only downside is the boards pretty big compared to this amp....was hoping to keep it all as small as possible....still its hardly going to be a paving slab size when finished is it😀
Hello!
I want to buy a mono TPA3116 board to replace my subwoofer amp.
I found 3 models so far, please advice wich design looks better, as far as you can tell from pictures.
DC 12V 24V TPA3116 Digital Power Amplifier Board Mono 100W for Car Motorcycle | eBay
TPA3116 Digital Power Amplifier Board Module 100W Mono BTL Output | eBay
DC 12V 24V TPA3116 Digital Power Amplifier Board Mono 100W for Car Motorcycle | eBay
Thank you!
I want to buy a mono TPA3116 board to replace my subwoofer amp.
I found 3 models so far, please advice wich design looks better, as far as you can tell from pictures.
DC 12V 24V TPA3116 Digital Power Amplifier Board Mono 100W for Car Motorcycle | eBay
TPA3116 Digital Power Amplifier Board Module 100W Mono BTL Output | eBay
DC 12V 24V TPA3116 Digital Power Amplifier Board Mono 100W for Car Motorcycle | eBay
Thank you!
Not having tried any of these here are my observations:
1st and 3rd seem to have bigger inductors - the second one has tiny SMT inductors. Third one probably has better power supply bypass with 2 caps per recommendation of factory schematic. You know that to get 100w you need 2ohm driver.
I would pick last one if it were me. So cheap that it's not a big deal to test.
Pictures can be deceptive, you think the biggest board has smallest inductors, large smd electrolytic might be deceptive too. Biggest footprint inductors are the ones that look smallest. These "TDK" would be around 5A and are listed as shielded, the smaller through hole "TDK" are unshielded and could be same current rating, the unbranded big looking on smallest ampboard probably weakest, but all of them not rated for PBTL, 15A.
edit: redboard is only one with differential inputs
edit: redboard is only one with differential inputs
15A? Isn't 10A or 7.1Arms enough for 2R? (Even if i don't think those inductors shown in the links are capable of that either.)
(For a BTL/PBTL-board this is then halved by two (because PBTL), so 5A or 3.55Arms is enough if using 4 inductors.)
(For a BTL/PBTL-board this is then halved by two (because PBTL), so 5A or 3.55Arms is enough if using 4 inductors.)
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All boards shown have two inductors, ideally inductor should be linear to 15A peak, mentioned couple of times on TI support, maybe they should have said 11Arms you feel? Datasheets for inductors mostly Arms ?
Texas Instuments talks about 7.5A for BTL and 15A for PBTL. Inductor datasheet talk about A at which point inductance loss is already 15% or 30%. So in reality the inductors aren't linear anymore at rated A. You like to add rms, TI doesn't, I haven't seen it in inductor datasheet, but haven't been looking for it either🙂
mord and irri, you guys are really entertaining.
i know none of these, but i have a danzz-board in pbtl for my living room sub and it works great.
it is a 4r woofer in my case.
if it were an 8r it would maybe lack some power or better say it maybe could not play the levels i push the stereo to.
there is another pbtl version, i ordered recently, but that didn't arrive yet
tpa3118 pbtl mono digitalverstrker bord 1x60w 12v 24v endstufe in tpa3118 pbtl mono digitalverstrker bord 1x60w 12v 24v endstufemono 50w digitalverstrker bordVerstrker chip: tpa3118Ve aus Verstrker auf AliExpress.com | Alibaba Group
i know none of these, but i have a danzz-board in pbtl for my living room sub and it works great.
it is a 4r woofer in my case.
if it were an 8r it would maybe lack some power or better say it maybe could not play the levels i push the stereo to.
there is another pbtl version, i ordered recently, but that didn't arrive yet
tpa3118 pbtl mono digitalverstrker bord 1x60w 12v 24v endstufe in tpa3118 pbtl mono digitalverstrker bord 1x60w 12v 24v endstufemono 50w digitalverstrker bordVerstrker chip: tpa3118Ve aus Verstrker auf AliExpress.com | Alibaba Group