I play Bass Guitar in a Southern Rock, Classic Rock, Country band and this head is one of my main amps I use. I have had a GK 400rb but in my O/P the 400 b sounds much cleaner. I also use an Ampeg v4bh & 450 but the GK is just a clean amp. I run it thru a 15 Bag end and a 12 bag end. It is a very loud amp and at high voliuns does not break up. I rarely play it past 5 on volium and master settings. Its a very light amp and very well put together. At 250 watts in to 4 ohms it is a lot louder than it sounds. I play a 72 P Bass and a 96 Jazz bass and this amp sounds great. I really don't see any bad things about the amp except that there is no stand by switch. I picked this up in a pond Shop for a practice amp for $100.00 and got a gem. If you can find one grab it. You won't be sorry.