This is twice as loud as the concert series amp. This is on stage for professionals only. The item "VINTAGE Sunn Coliseum Bass Amp Head PHANTOM 300 WATTS SUPER RARE PRO TESTED" is in sale since Monday, December 21, 2020. This item is in the category "Musical Instruments & Gear\Vintage Musical Instruments\Vintage Guitars & Basses\Guitar Amplifiers".rumph" and is located in Fairfield, California. This item can be shipped worldwide.