I had the KC 500 for over 10 yrs until it got into a car accident. Loved it and now love this new one. I really try to take care of my stuff and don't like it looking road worn. So I hate when buds as for a loan out.My only complaint is the brass thingys always come off the knobs,75 lbs and the increase in price.The last one paid for itself -hope this new one will too.

I was practicing with my band in the keyboard player's studio and this was the only amp that we had, so the drums, my guitar, and the keyboard were all plugged into this baby. I was suspicious at first, but it sounded really good with my les paul, a yamaha keyboard, and a roland electric drumset. even with three instruments plugged in to one amp. We ended up using this amp for all of us at a few gigs, too.

I needed to replace an older Peavey KB-300 that I had used for several years. I've owned Roland keyboards and had good luck with them, so the Roland KC-550 seemed like a good choice.

The amp has plenty of power, and the 15" woofer handles the bass with ease. I even played bass guitar through this amp and it sounds pretty good.

Initially, I purchased the Roland KC-550 over the Behringer K3000FX because I thought that the quality of the Roland would be better. Both the Roland and Behringer are made in China. The Roland is rated at 180 watts and the Behringer is rated at 300 watts, but they both perform about the same. The highs on the Behringer sound more crisp and clear. Overall, I was disappointed in the Roland KC-550 for the price. The Behringer Ultratone K-3000FX has more features and sounds better for considerably less money! Buy the Behringer.

I use this amp for my TD-20 Roland electric kit for live gigs in clubs. It's range is fantastic. It's sound quality if also outstanding. It is very heavy, but I suspect all amps of this quality are heavy. I highly recommend this amp for electronic drummers that want to use their kits in a live situation.

I'm 5-starring this amp - but have found some problems like the ones listed in other reviews. This review is concerned primarily with tone, though, which is something I know is a struggle for keyboard players around the world.

Here's the skinny: If the keys are a focal point in your music - this is your amp. My 3-piece band is drums, baritone guitar and me on keys with the 550, and we stomp faces. This amp CAN drown out and/or mud-up-with the bass guitar, and doesn't have the bestest high tones (although the mids are clear and strong contrary to other reviews). That's that. If you want your left hand to have the push of a bass guitar (while still sounding just like the instrument you selected), I don't know of any other amp. It's almost magical. I also run an electric acoustic out of this amp and it sound clear, thick and thunderous.

Conclusion: If you want your keys to be icing on your music's cake, look for an amp with more push in the higher ranges. If you want your keys to kick people in the chest - if you want to be known as "that band with the awesome keyboards," buy this RIGHT NOW.