Air Tight Atm-2 has been a facter in my music,this amp love's to play music.I pick one up used for $1900 and had Tom Tutay (Air Tight Service) he install soft-start,WBT speaker post,rca jacks, better wire, and some of his updates,grounding, and caps and new vol- pods. Price $2600 so if you look you can find good deals. Doing your home work is the key here. It's takes time to find what work's for you and the music you love. (ATM-2,CD-50,SHEARWATER HOT-RODS,ZEN SHOTGUNS CABLES AND RCA)