Neo Geo MVS - Hooking up a subwoofer from the headphone jack

ebo0763

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Neo Geo MVS - Hooking up a subwoofer from the headphone jack

(Sorry for misleading title, I would sctually use the headphone connection at the main pcb.)

I have 4 slot and a spare harness so I would take the heaphone to main pcb connector and I would like to send it to a subwoofer.

The only thing is that my sub requires a mono input and I need to merge the neo geo stereo left and right into one.

I think the right way is to add resistor in series to each signal before they combine to prevent shorting them.

The question is, what resistor value? 10K?

We should also consider that the neo geo outputs a headphone signal while the sub needs a line signal. It should still work but I'm just saying...

I have to say, I tried with the right channel from the headphone jack to RCA from the front panel and it sounds great! Highly suggested to add a sub. It's just a matter of combining left cand right.
 
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Why not just get some y adaptors, you could use a mini jack to rca out, then get a female rca to male y cable. No soldering. If you are talking about soldering to a header you shouldn't need any resistors either, y cables share common ground, so it would only be 3 wires. One for right and left channel positive and the ground. All y cables do is combine them that way they don't have any other components wired in.
 
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Why not just get some y adaptors, you could use a mini jack to rca out, then get a female rca to male y cable. No soldering. If you are talking about soldering to a header you shouldn't need any resistors either, y cables share common ground, so it would only be 3 wires. One for right and left channel positive and the ground. All y cables do is combine them that way they don't have any other components wired in.

No, Y adapters are designed for splitting (from one output to two inputs) and not for combining (two outputs to one input). I mean you can combine but there's all sort of issues with that. The most important issue is that with no resistor, the two wires are effectively shorted and damage the hardware and won't sound too good either.

The resistor will prevent the shortage. The question is, what resistance value? I've seen 10K for regular line signal but the mvs is headphone signal, it shouldn't really make a difference but I was just checking with others what value is suggested.
 
Ok, did some further research on this and you are correct. Looks as if 10k is the common resistor, but others will work as long as both channels are of the same value. I was thinking of how I have my subwoofers hooked up, but they are only passing the signal so in my case it was ok to combine them...
 
Ok, did some further research on this and you are correct. Looks as if 10k is the common resistor, but others will work as long as both channels are of the same value. I was thinking of how I have my subwoofers hooked up, but they are only passing the signal so in my case it was ok to combine them...

So what "passing the signal" means in that context?
 
So what "passing the signal" means in that context?

I have 4 subwoofers for my home audio system, and they are hooked together on one output, thus passing the signal from one subwoofer on to the next in the chain. They have outputs that simply pass along the signal to one another, thus allowing the combining to one rca from dual outputs.
 
I have 4 subwoofers for my home audio system, and they are hooked together on one output, thus passing the signal from one subwoofer on to the next in the chain. They have outputs that simply pass along the signal to one another, thus allowing the combining to one rca from dual outputs.

Ok so I think for your subs that if it's high end there could be some sort of signal booster and if it's lower end it might just be a resistor.
 
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