Versatile cab audio. Mono, stereo, speaker and line level

[Geddon]

For those who have a cab and swap in jamma boards and cps2/Naomi other stuff with rca stereo output, what do you do for audio to make it easy? I’m assuming what I want is

Some sort of speaker to line level converter to take audio off the jamma edge. I guess get it to rca. I’ve seen two ways of wiring this. Using speaker+ And speaker- and using speaker+ and ground and not using the speaker-? This is confusing. I guess some sort of box that makes it simple and just gives speaker in and rca out would be ideal.

Then take that to a little speaker amp with rca inputs and stereo output. So I can just use a rca splitter to get jamma audio or plug in stereo from cps2/Naomi whatever bypassing the speaker to line level converter.

Then simple wire from the speaker amp to stereo cab speakers.

Maybe a rca switchbox to switch from jamma audio to whatever else and make that and the amp easily accessible to control bass, treble, volume levels.

Basically I want a solution that will work for everything and be easily adjustable and I’m wondering what you all do.

 

[PascalP]

In my NNC I use a small line level convertor, speaker in, RCA out.

I can connect it in 2 ways depending on which PCB I connect;

1. For boards with stereo headers (mvs, Konami etc.) I connect the line level convertor directly to the 4 pin headers on the PCB via a JST NH connector
2. For Jamma mono boards I have wired my Jamma loom to a JST male connector which I can plug in the line level convertor. I have wired speaker+ to both L+ and R+ and speaker- to both L- and R- so I get dual mono from the line level convertor on the RCA connectors.

 

[Geddon]

Ok sounds pretty similar. I don’t have any Konami boards and I just have mvs 1-c which I’m planning to add rca jacks to. So I think my plan is get everything to stereo rca that isn’t jamma mono to make it easy.

 

[PascalP]

Lots of stuff with amplified stereo output headers you need to get to line level:
- most Konami boards
- MVS 1 slots (e.g. 1FS)
- Atomiswave
- CPS1 (still need to test this one)
- Sega STV

So depending on which boards you own, it might be easier to use 1 line level converter instead of modding every board to line level RCA