Bi-amped Maggie tympani 1d's,line sourced arranged RTR esr15's added.crossed/filtered at 5K. janis w2 sub w/it's amp crossover. Modified dyna st-70 (rtr amp) and pas preamp.(modified) pioneer spec II amp (maggie bass/mid amp). sound design amp for maggie tweets.Audio research/magneplanar crossover made for this setup.Thorens TD 145 table w/rewired tonearm. Retipped grace F9E ruby cartridge. tuner,cd players. I'm the original owner of all 'cept the rtr's.No purchases since the 80's except the cd players.I did all the mods w/occasional help. ALL w/less than $4000 invested, hard for anybody to beat that sound for the buck value. Remember 1980's $4000. Not all things to all people but I've never listened to anything that comes CLOSE to it for even$20K. No esoteric amps,cables,audio voodoo,just reasonable eqpt.picked to do a specific job. Plenty of power for the hungry maggies,added rtr's give a little sparkle. janis used sparingly for the VERY bottom punch. Just wish I had them back in the room they deserve but that's life.