... where the 3.5mm on a "boom-box" is a MONO-subwoofer output. Note: Your output device must be able to ... plug, Stereo plug,RCA plug etc.Our 3.5mm Mono Plug to RCA Jack are almost sale to North America ... other foreign country. Our monthly capacity of 3.5mm Mono Plug to RCA Jack is 1,000,000pcs,this is ... order we have more we can do more 3.5mm Mono Plug to RCA Jack than present capacity. Our factory ...