arcadeaction
Enthusiast
These RCA output line converters are inexpensive and work well to connect a CPS1 multi mono audio to a stereo wired cabinet.
I soldered a mini plug to the CPS1 multi adapter card JAMMA pin audio out pins. Then I connected one of these output line converters by installing a plug on it so that it can be easily attached or removed when needed. I doubled up the wires from the converter so the connection makes dual mono out.
https://www.amazon.com/dp/B09VYRLQRQ?psc=1&ref=ppx_yo2ov_dt_b_product_details
You get two of them shipped for about $9.
I soldered a mini plug to the CPS1 multi adapter card JAMMA pin audio out pins. Then I connected one of these output line converters by installing a plug on it so that it can be easily attached or removed when needed. I doubled up the wires from the converter so the connection makes dual mono out.
https://www.amazon.com/dp/B09VYRLQRQ?psc=1&ref=ppx_yo2ov_dt_b_product_details

You get two of them shipped for about $9.