Tube amps and speaker ohms

I just checked the biasing on my TAD-60 as I just changed an output tube and had to make adjustments to get the balance right as it did not sound right after I changed the tubes. Turned out I had to readjust two out of three tubes. Then I checked the sound and it sounded nice and balanced again... So, I agree with TVAD that you have to check the bias either every six months as Paul Gryzbek recommends or when the music doesn't sound balanced... On the TAD-60, Paul supplies you with a $10 meter and gives you instructions on biasing the unit. On the 07s, the biasing meter is on the unit...

Eagleman

Divad, I am running a Tube Audio Design-60 with Vandersteen 2CE sigs (86DB I think. This amp runs 60 watts ultra and can be switched on the fly to triode (30 watts). This amp has plenty of juice for the vandys. I listen mostly to classic rock at room filling but, not loud levels and the vandys really sing. See Larryx7s post above. The TAD-60 can handle many EL-34 type tubes and is easy to bias. Check out the reviews on this amp. I haven't heard many other tube amps to compare but, I bet that it competes very well with amps in its $1300 class...

Eagleman

Ok, here is a question that may show my ignorance of this subject but, I will ask anyway. I have a TAD-60 AMP (60 WPC ultralinear).. It has 8 and 4 ohm terminals. I am running Vandersteen 2CE signatures which are rated at 7 ohms nominal and 4 ohms minimum. I am currently using the 8 ohm terminals in my set up. Would I be better off using the 4 ohm terminals? If so, then why. If not then why not.
Thanks,
Eagleman