I was so impressed with the combo 200 and 500 at GC and Sam Ash that I picked up the 500 combo with a coupon and am really enjoying it. Great tone variations, looks like it has white damping material when I look inside one of the two bass ports of this punchy little amp. Not much coming out of the tweeter, but its not too tinny and has an on/off switch. Lots of punchy sounds for a 2x10 and a great feature is the direct input through the effects return. It is pre-everything and enabled me to plug my sansamp DI pedal directly in and take full control of the amplifier through the sansamp in including level and all tone. Finally! It bypassed all of the controls on the amp and let me to take full control with the pedal making it like a slave amp. Simply incredible to be able to do this (to me anyway). I couldn't do that on my Little Mark or Genz Shuttle heads which still had gain and / or tone controls active when using the effects return. At 36 lbs, I can put the sansamp in my gigbag and carry the amp in one hand and the bass in the other making this really convenient with great tone and power.