Active or passive preamp

For the record, TVC's have an output impedance below 100 ohms for all but the highest 2 or 3 steps. In fact, the first half is usually under 1 ohm. S&B removed their website that showed this.

Ngjockey,
Thanks so much for that information! I have looked high and low for output impedance on TVC's to no avail. All I ever got was a nonspecific "lower than resistor based designs." Is that true for all TVC's, or only the S&B's?

For what it's worth, I ran a Sonic Euphoria passive line stage for years with an Aragon 3002 amp, and never had a problem with an impedence issue, always had as much volume as needed with that combination. I don't recall the input impedence on the Aragon, but the combination worked very well for me.

Regards,
Dan

I have used an Aragon 8008bb amp with an EVS attenuator which is fixed resistor. Im not going to sell either piece as that Aragon sounded better then my Levinson and the EVS has a transparency none of my 12ax7 or 6sn7 pre amps could match. But; and a big but; together they were meh. Always moving the sub crossing frequency and dealing with room bass nodes. After discovering impediance matching I bought a Bent silver tvc and found bliss. Two months later I gave up on the low sensitivity rig and now its speaker to set amp impediances Im dealing with.

S&B removed their website that showed this.

For a while the URL I bookmarked still displayed that page even though S&B removed it from view on the public site. However, now the URL is dead too. That was a very informative chart. Don't know why S&B felt the need to remove that page.