I have a 1971 Plush 4000G with a 4-12 Plush cabinet. I used it for guitar but bass players I knew liked playing through it as well. I bought it back in 1976-77 and used it off and on until about 1980 when I put it in storage. I brought it out briefly in the late 90s so my son could check it out. It's the wicked orange version, which made my son laugh until the wave of sound hit him in the face : ) Everyone's reaction is similar, "Holy ___ that’s loud!" I just brought it out again (Oct 2018). Aside from one missing speaker and some Naugahyde damage it's in great shape. I cleaned the pots, plugged a telecaster in and shook the entire garage with the same awesome sound it put out close to 50 years ago. Of the four original speakers, one is missing and another was re-coned without an aluminium dust cover. I'm finding it very difficult to find similar XK-12 speakers with the aluminum. I’m considering packing up the 3 originals and putting 4 12” swamp things in there. The dust caps look great through the grill but I would actually like to hear what it sounds like without them. ANY suggestions? I learned quite a bit about Plush amps and history by reading those old posts here. Thanks for that! I'm hoping to restart a conversation and learn more.