#1
Yes many factory amps are sent from the factory with a colder bias on the tubes

from http://reviews.harmony-central.com/reviews/Guitar+Amp/product/Orange/Rockerverb+100+Head/10/1


what are the down sides to this?
does getting your tubes rebiased fix this?
what does "biasing" your tubes even mean?

thanks

07 Fender American Deluxe Strat
07 Fender Custom Telecaster
09 Seymour Duncan Pickup Booster
09 Fulltone OCD V.4
10 Ibanez WH-10 V.2
09 Splawn SuperStock
10 Jet City JCA-20
97 Fender Hot Rod Deluxe

Yeh the SICK! bit sounds a bit stupid.

#2
bump

07 Fender American Deluxe Strat
07 Fender Custom Telecaster
09 Seymour Duncan Pickup Booster
09 Fulltone OCD V.4
10 Ibanez WH-10 V.2
09 Splawn SuperStock
10 Jet City JCA-20
97 Fender Hot Rod Deluxe

Yeh the SICK! bit sounds a bit stupid.

#3
does nobody know?

07 Fender American Deluxe Strat
07 Fender Custom Telecaster
09 Seymour Duncan Pickup Booster
09 Fulltone OCD V.4
10 Ibanez WH-10 V.2
09 Splawn SuperStock
10 Jet City JCA-20
97 Fender Hot Rod Deluxe

Yeh the SICK! bit sounds a bit stupid.

#4
Biasing is adjusting how "hot" the tubes run. The hotter tubes run, the easier they reach break up levels. Manufacturers generally run them a little "cold" because it prolongs tube life. And yes, if your amp has an adjustable bias, a tech can set them to run a little hotter. If not, the amp can be modded to do so.
AMP:
5150 combo
GSP1101 + Tech 21 PE60

GUITARS:
ESP LTD M-255 w/ SD Full Shred
Kramer Vanguard w/ JE-1000 active preamp
Douglas WF-150sn w/ GFS "Hot Lead" set

EFFECTS:
Bos SD-1 (boost)
AMT DT-2

My Youtube Vids http://youtube.com/user/mogar