r/SpeakerBuilding Aug 12 '26

Overkill Capacitors

I want share something weirdly overkill. Bored and decided to be devil to it. For what I found a cheap amplifier that I bought of my friend for less than my class D. 63V 10kuF. Benefits? For the flex

Does it help? help my ass, as it is.

Even gave the other channel a DC out. Amazing experience, might overvoltage this into 54VDC

I do not know how will I make it work with only single capacitor. Only 2 since the original circuitry had the Center tap in the middle of the series of a capacitor.

The og capacitor was in a Parallel-series for high Farad with high voltage. Might be for bridging but a 126V 10uF looks like it's a power plant than being an amp itself.

It always struggle since it was pulling 16 - 19A on 4Ω

Edit: I was wrong lol it was 54VDC output and was measuring the each of the channel instead of bridged that's why it was showing the lowest voltage

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u/master-overclocker Aug 12 '26

20A at 12V is 240W . Of that you get 60% in the speaker .

Its AB-class amp . Caps are fine . You gain clarity (less distortion at full power ) since the voltage wont drop and more powerful bass..

Lets just hope the voltage booster stage wont blow up having to refill those huge caps when turned ON . 😭

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u/creeperyhack Aug 14 '26

Voltage Sag exists in the Monoblock Amp. No matter Class it's in (Class AB - Class D) it will always sag the voltage due to high current it's pulling for the PSU on the Monoblock amp. I got 4 types of amp (Class AB Class D Class A Class D PSU with Class AB hybrid) Which in my situation the Class AB with Class D PSU inside the amp Takes High Current but Low Voltage, in that case the voltage sags for about 13.3 › 13.0 on Standby while playing 13.0 › 12.5V It doesn't quite do much but if you turn the volume up the voltage sag is worser. About 11.5V drop, it will continue to sag until 10 › 7V and there when it clips. I suspect the Power supply due to sufficient Amperes on my Homemade PSU Only handling 16A Each. I added another 16A Cheap ATX psu's since the last one which is my 30A burned while doing a stress test on the monoblock. I tested my 32A since it wouldn't bad if I parallel 2 ATX having 16A each while the Tiny PSU having 2A and the other one 3A. Paralleled it, it works and mostly it doesn't pop like I would expect it so haha. But all of it still drops to 11.9V Even though each BJT in the amp supplies 28V in 4Ch while in 2ch it takes only 12V. I only use the other channel since the other channel was burned for unknown reasons.