So I posted another post which had some questions on the volume between sub and back box. I retrospect I was a little quick on the gun to write it. In my 25 machine past and present collection I have always upgraded the speakers and sub and doing that always had to figure out how to balance the sub to the back box. In older Sys 11 I used the add resistors to the sub and newer WPC I added an amp to the line outs and controls treble and bass and balance from sub to speaker. I always on every machine had a huge difference from back box to sub.
Moving to today this is the first time I tried a pinball speaker vendor and was a little surprised there was not volume balance.
Well after installing them today I can say they did their homework. No balance needed. Plug and play and awesome.
Anyone with a MMR needs to send those Chinese speakers back to China and get these. I cannot believe how well I can hear the Duke of Bourbon, etc. Well worth it and top notch service.
Send the China back to China petition and get some Pinball Pro!