Would it be possible to substitute a Brownface Princeton OP Trans in Brownface Deluxe in order to cut the 20 watts or so to around 12? Is that a "no-go" because of voltage problems or other circuitry incompatibility? I love my Brown Deluxe Clone, but due to people trying to bring down stage volumes (me included!), I'd like to have one that isn't quite so loud, but is similar in tone. Yes, having a Brown Princeton in addition to my current amp would be nice, but it'd be pricey. I certainly cannot afford a Fender Chris Stapleton Princeton! I've built a number of amps from kits, so I am reasonably familiar with working under the hood. My Deluxe has nice Mercury x-formers now, and they sound great. However, I really am trying to replicate the sound I have (WITH the GA64 speaker) at a lower volume level. Another question might be..."Is there a speaker that sounds like an Eminence GA64, but is not so efficient?