Stereo to mono class-d amplifier

SentinelAeon · Jun 26, 2024

Amp will be used for videogames, connected through 3.5mm to monitor. I am trying to convert stereo amp into mono but keep the volume knob. pins going in and out of the potenciometer are marked yellow, where i want to join L and R with resistor is marked red. So i am wondering, instead of putting separate resistor on each channel, could i just use 1 to bridge L and R channel (marked with red R) ? It wont be perfect mono, but for video games .., and i at least i protect the channels a bit and get to keep the potenciometer. The potenciometer when turned all the way has 1.2 ohm.

edit: Amp will be connected only through 3.5mm jack, so bluetooth wont be used. Would it be easier to just make mono using the pins around 3.5" ? Desolder the pins and put 50 or 100 ohms on each channel ?

SentinelAeon · Saturday at 10:56 AM

Not to get out of hand here,

1) i was asking about resistors for stereo -> mono because i cannot add the resistors if i want to keep the volume pot and i want to keep it. I could maybe desolder the pins near 3.5mm input but i think i will just risk it since its a 8$ amp.

2) question about volume is for a different usecase but same type of amp. I like to stick to high voltage, since they mentioned distortion i would bet my ass that lower voltage affects audio quality. And since on that particular amp i soldered my cable directly to 3.5mm pins, its really easy for me to add a resistor on each channel. Hopefuly that will reduce the volume without introducing to much hiss.

EDIT: I use this cheap amps all the time. I can't tell the difference between this 3116 amp and a big Pioneer amplifier i had before. Might be that the pioneer was that bad or im just deaf. In either case, since i started from complete 0, this amps are a great way to experiment and learn new things without being afraid to damage anything. If it was a 100$ amp, i wouldn't be so keen on testing whether resistors are needed when mixing stereo into mono

ZipZapOuch · Saturday at 2:24 PM

SentinelAeon said:
Not to get out of hand here,

1) i was asking about resistors for stereo -> mono because i cannot add the resistors if i want to keep the volume pot and i want to keep it. I could maybe desolder the pins near 3.5mm input but i think i will just risk it since its a 8$ amp.

2) question about volume is for a different usecase but same type of amp. I like to stick to high voltage, since they mentioned distortion i would bet my ass that lower voltage affects audio quality. And since on that particular amp i soldered my cable directly to 3.5mm pins, its really easy for me to add a resistor on each channel. Hopefuly that will reduce the volume without introducing to much hiss.

EDIT: I use this cheap amps all the time. I can't tell the difference between this 3116 amp and a big Pioneer amplifier i had before. Might be that the pioneer was that bad or im just deaf. In either case, since i started from complete 0, this amps are a great way to experiment and learn new things without being afraid to damage anything. If it was a 100$ amp, i wouldn't be so keen on testing whether resistors are needed when mixing stereo into mono

You can just solder the resistors at the 3.5mm input cable.

Stereo to mono class-d amplifier

SentinelAeon

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Stereo to mono class-d amplifier

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