Just an update. I've been running the vtrm with it's subsonic filter removed to allow more low end and it has worked much better for me. I didn't care for it when using the power section of the genz sm9.2 but, when I switched to a big carvin amp it gave me back that big o'l lead slead sound and feel. If you've got real power to burn, try removing the filter. I've been going through alot of preamps and keep coming back to the vtrm. It does sound better than any of the vt series pedals too. More headroom, wider and clearer sounding. Sometimes I wish that I could get alittle more of this or that out of it but, it's a small trade off for working so well. Also, at a live gig where you can't be annoying the crowd or band by spending your time knob twiddling, it's usually a matter of turning one control 1/4" to make a drastic change. At that point, close enough is good enough and you just go back to playing. I've been looking hard at a few top end tube things but, it's hard to justify when a $300 preamp is beating out so many top shelf peices.