I don't think Roland make, or have ever made, anything with 4 in's & 4 out's.
This is not a modern unit, this been discontinued a while, just discovered it while search for true stereo processors.
It does appear to offer 4 individual inputs, 4 processors, and 4 outputs.
At the price, and for your usual application I think it's ideal.
There is a few on ebay, and some actually cost more.
Good stuff! One of these went on eBay last week for £90 and I wished I had a good excuse... and £90.
£89 of which I spent an old Behringer MX2642 mixer on eBay this week so when that arrives I can get on with experimenting with putting different aux send/return loops through different Quad 4 modules and mixing different channels into them.
So I'll be back with some more routing conundrums soon...
I hope you have better luck with your Berry MX from ebroke than I did with the one I bought some years ago.
I was trying to source a replacement rack mounted mixer for the keyboards in the band I was working for.
Got one of these, however I found is wasn't quite 'ultra low noise' as it should have been. Any adjustments made on the eq section resulted in audible noise. Not 'pot crackle', a low rumble.
It sounded like a DC problem, it died within a week, smoke coming from the supply section.
Fit for the skip..
Hmm, well here's hoping. There's an enormous amount of noise on the headphone output of mine. I could tell as soon as I had it out of the box that the quality was abysmal - the faders don't slide smoothly etc.
Still, it's only one to 'learn' on, as it were - when I've found my feet and got some money together I'll get a semi-decent one. It's just hard to find a mixer with several subgroups that doesn't also have a million inputs...