I've got an EBS Gorm ET350 2x10 cab. When I play my passive basses through it there is no problem, but when I try to play whith my Spector NS20004 (active preamp, passive pickups) I can't get any sound. I replaced the battery a couple of weeks ago so there isn't supposed to be any problem there and I've played through a mixer and it works. The only sound I get is when I play high up on the E-string (very muffled sound) or slap the E-string (toneless "thud"). I've checked the volume knobs on both bass and amp and I've checked gain and flatted the EQ. Still - No sound. It started a couple of days ago when I was sitting in front of my computer and playing bass. I can't remember doing anything special but it suddenly died as if the amp was turned off. Does anybody have a clue what it might be?