I’ve got this dayton dspb-250 amp and the sound is... worse than the other 3116 amps in my pile here.
I’m trying to do some upgrades, the input caps are 0805, but i’d like something better (and smaller capacitance). There’s no way to mount the smd version of the wima mks-2 caps i was looking at without putting them on a small board nearby with some flying leads. My instinct is that this is probably still better than the stock ceramics (of unknown value)
It doesn’t look like any film caps are small enough to fit 0805 (i could maybe squeeze 1206), even at the small values of .47-.22uF that i’m looking for.
Does anyone have experience with this problem? Are there better caps in the 0805 size or should i just use the through hole caps with wires...
I’m trying to do some upgrades, the input caps are 0805, but i’d like something better (and smaller capacitance). There’s no way to mount the smd version of the wima mks-2 caps i was looking at without putting them on a small board nearby with some flying leads. My instinct is that this is probably still better than the stock ceramics (of unknown value)
It doesn’t look like any film caps are small enough to fit 0805 (i could maybe squeeze 1206), even at the small values of .47-.22uF that i’m looking for.
Does anyone have experience with this problem? Are there better caps in the 0805 size or should i just use the through hole caps with wires...
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If you are not going to buy the DSP software, perhaps you can bypass all the front end stuff and drive the chip direct.
Have you played with the adjustment pots? According to the manual
" Note that these controls are only guaranteed to be valid if Sigma Studio has not been connected to the DSPB"
Have you played with the adjustment pots? According to the manual
" Note that these controls are only guaranteed to be valid if Sigma Studio has not been connected to the DSPB"
Rubycon 16MU224MZ22012 is a 220 nF, 16 V, 0805 film capacitor type:
https://nl.mouser.com/ProductDetail/Rubycon/16MU224MZ22012/?qs=T3oQrply3y%2BM8bQWZCSUDw==
I have no idea if they are any good, but all film capacitors I know of distort far less than class 2 ceramic capacitors.
Another alternative would be ceramic class 1 instead of class 2. However, 220 nF ceramic class 1 capacitors exist as NP0 / C0G MLCC, but those are also bigger than 0805.
https://nl.mouser.com/ProductDetail/Rubycon/16MU224MZ22012/?qs=T3oQrply3y%2BM8bQWZCSUDw==
I have no idea if they are any good, but all film capacitors I know of distort far less than class 2 ceramic capacitors.
Another alternative would be ceramic class 1 instead of class 2. However, 220 nF ceramic class 1 capacitors exist as NP0 / C0G MLCC, but those are also bigger than 0805.
Excellent. I’m not looking for audiophile quality out of this thing, but i know that the tpa3116 can sound better. Do you have any recommendations for the output filter? None of the other 3116 amps i have use such small inductors and diodes of any kind
The choice of output filter component optimization depends on switching frequency and load. The higher the frequency the smaller inductor you need. If you only use 4 ohm speakers then a lower value inductor with a higher current rating is required.
I am using the dsp, and have the software. It uses the standard sigmastudio. But the DSP outputs single ended analog into the input filters of the tpa3116
I don't think replacing the input ceramics for the tpa3116 will change the sound, too much in front of those 2 caps I think. The tpa3116 part of the ampboard doesn't look bad in pic.
No? Ok. I posted in another thread some thd plots, there are some things down in the audible area. I don’t have experience interpreting those plots though, could be nothing.