Nuforce DDA-100. Power DAC type of amp so only digital inputs. Very good amp too !
Destroyer OS mentioned this PS some weeks back, he kindly supplied me a schematic when I expressed interest. I will leave it to him to share details.
When only hiss, it is gain I guess. Hiss, rattle and hum combined it is lack of shield
(as experienced with cheap cinch to digital DVR for television set with YJblueblack, "audiobah" I just tried and is a little less loud, but also less gain, both 20dB setting gainresistors tpa3116) TI advises 47nF to gnd and 100R in series on signal in a reference design, "audiobah" uses 47nF and 10k to ground and 1k in series with inputsignal I think. Could try it if you don't already have something like that. EMI I can't compare, but inputsignaltraces YJblue I feel might be to blame.
(as experienced with cheap cinch to digital DVR for television set with YJblueblack, "audiobah" I just tried and is a little less loud, but also less gain, both 20dB setting gainresistors tpa3116) TI advises 47nF to gnd and 100R in series on signal in a reference design, "audiobah" uses 47nF and 10k to ground and 1k in series with inputsignal I think. Could try it if you don't already have something like that. EMI I can't compare, but inputsignaltraces YJblue I feel might be to blame.
More humble modifications to my smsl SA-36A PRO TPA3118 powered with an AMB sigma-11 @ 18V.
Did the 2x OSCONs last week. Today it got 8x Panasonic FM 820uF (10x25mm). Fit beautifully in the case with ~5mm clearance at the top. The stock 470uF are shown for comparison. Sounds fine - need more listening time to say more. I suspect that with a really capable PS these capacitor changes make less difference, but I'll take whatever I can get.
Cheap thrills!
edit: Almost forgot to add...very minor turn-off thump stayed about the same over these last two upgrades, maybe a little less after the FMs.
BK
Did the 2x OSCONs last week. Today it got 8x Panasonic FM 820uF (10x25mm). Fit beautifully in the case with ~5mm clearance at the top. The stock 470uF are shown for comparison. Sounds fine - need more listening time to say more. I suspect that with a really capable PS these capacitor changes make less difference, but I'll take whatever I can get.
Cheap thrills!
edit: Almost forgot to add...very minor turn-off thump stayed about the same over these last two upgrades, maybe a little less after the FMs.
BK
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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Danzz boards on sale for $13.99 at the YJ site!
Yuan Jing Audio - ON SALE! - TPA3116 Class-D 2.0 Stereo Amplifier Board [50W+50W] - $13.99
For those of you who have not ordered from them before, they package well and get these to you in about a week.
Yuan Jing Audio - ON SALE! - TPA3116 Class-D 2.0 Stereo Amplifier Board [50W+50W] - $13.99
For those of you who have not ordered from them before, they package well and get these to you in about a week.
Definitely very nice with the new FMs. Something was a bit "off" after installing the OSCONs. Very sweet now and in a good place. Thanks to rhing for the inspiration!
BK
C'mon, for the price of $550 USD, it's not even fair to compare to the $15-30 worth boards!
and if for that price a device does not sound at least good I would take it and smash it into the factory's window
Perfectly fair in my opinion - these boards with full mods and quality power supply are able to beat amps in that price bracket in terms of SQ. Of course its not simply a $15-30 board by that stage!
Destroyer OS, are you going to design a pcb from scratch? If so, do you think its possible to use trough hole so you could put input caps and bootstraps caps on the underside, close to the chip? My experience is that it eliminates a lot of noise. On my best sounding tpa's I use smd film caps which could easily fit on the underside of the pcb.. Putting some of the traces underneath would allow wider pcb traces to output and psu, keeping resistances to a minimum.
By the way I assume you are aware of this http://www.diyaudio.com/forums/group-buys/257996-gb-tpa3116-8-pbtl-bare-pcb.html
Agreed. I am listening to my modified YJ amp playing Henryk Gorecki's Symphony No. 3 performed ny soprano Dawn Upshaw and the London Sinfonietta conducted by David Zinman. This can be a system killer with Ms. Upshaw's vocal range, the string polyphony and the deep-rooted bass notes, yet the amp solidly holds it's place and conveys the emotions of a Polish mother grieving over the loss of her son in war.
I was more referring to Jean-Paul's complaints in this post
But hey if you say it's fair, then sure yes - it is. Once you spend days even months on modifications, extra $$$$ for better parts-caps, inductors, chassis, linear power supply,.. and at the end come close to the price of that DDA or whichever well made finished amp.
All that excluding labor, hours or el. power spent on soldering, light and internet costs, of course
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I was more referring to Jean-Paul's complaints in this post
But hey if you say it's fair, then sure yes - it is. Once you spend days even months on modifications, extra $$$$ for better parts-caps, inductors, chassis, linear power supply,.. and at the end come close to the price of that DDA or whichever well made finished amp.
All that excluding labor, hours or el. power spent on soldering and light, of course
Sorry to disagree but I have compared to 2 high quality amps I have built in the past costing 4 or 5 times the cost of a fully moded TPA3116 and taken far more hours to build. The TPA amp beats them both. In my opinion these TPA3116 amps would never come close in cost to a commercial amp of comparable sound quality.
But what I am really saying is don't let the low cost make you think these amps don't cut it with the competition even in much higher price brackets.
I never said that. I have my YJ black modified at the cost of about $5 for two Dc caps, gratis samples of Coilcraft inductors, $15 for power supply + few $$ for connectors, box, and that's it (labor excluded
)! It is my main amplifier now! Sounds great, so much that I'm thinking what to do with the rest of my three tube amps. Hope it's clearer now
Hope it's clearer now
Yep, no probs!
Wasn't implying you said that, I meant "you" as in anybody.
In fact I just sold the first of my 2 tube amps today - I realised I would not be using it again!
Do try the snubber mod, real cheap with SMD components and takes it that step further.
I am like two mods behind some of you, esp. since people are now using input transformers. I want to try the snubber mod next but had zoned out when most of that discussion was going on. Is there a chance that someone can update the Wiki to show the list of parts and links to those great pictures people posted of the mod?