During the Mellon Collie tour Billy has been seen using an Orange Head run though two 4 X 12 Marshall Cabs.
[product info]

Listed on eBay on 2011/06/23 with the following caption:

90's reissue Orange OR-80 Tube Amplifier Head. Used by Billy Corgan in the studio on various Smashing Pumpkins recordings. Minor scratches on sides, does not affect functionality. Serial number is #651. A certificate of authenticity is included.

The auction ended on July 3 with a final bid of $1,050.

Tweeted by Billy on 2011/09/05: "Bat strat>Companion wah>Beano Boost>vintage Orange head=happy Labor Day everybody"