I actually want to buy another one, not only for a backup, but to use them both in larger gigs.

Sound
I have used my KM100 twice now. First in my carpeted studio with another musician (guitar/vocals) we had plenty of power and nice decent sound. Be careful of jacking the highs too much because this thing can CRANK the high EQ frequencies and it hurts!! Second experience: today I was outdoors in a medium space with a guitarist and a sax player. I had my Yamaha PSR-S700 keyboard (drums, bass, keyboard sounds) connected via stereo 1/4" to stereo RCA plugged into the Auxiliary jack of the KM100 and the aux volume on the KM100 at noon. The sax player had a little Yamaha mixer and he plugged his sax condenser mic and my Shure beta 58 into the little Yammy mixer and then we routed that via a single 1/4" to Input 4 on the KM100 and put Input 4's volume at about 10:00. The guitarist had his own Line 6 amp and was self-contained. The overall volume knob on the KM100 was at noon. The KM100 was on the ground tilted back on its wedge shape so that it projected up a little. We had it between and behind myself and the sax player. EQ-wise: I pulled the mids down a tad and boosted bass and highs very slightly. Overall impression: This thing has PLENTY of power. The 12" cone looks pretty rugged and indestructable. We were at maybe half power and quite easily filled the grassy lawn area where we were. Even with that many "instruments"… read more (drums, bass, keyboard sounds, sax, and vocals) pouring into the KM100 it reproduced everything cleanly. In retrospect I could have boosted the bass a little more. I fully expected to wrestle with feedback from the two microphones, but partly because we carefully pointed them off axis and partly because they're good mic's we had NO feedback problems. I am very impressed with this little guy so far. It sounded so good that for medium to larger outdoor gigs I think I may go get another KM100 and do everything stereo and have twice the power and have two point sources of sound. For most indoor gigs (smaller to medium rooms), ONE of these is plenty. VERY solid sound. I had considered the Behringer 15" keyboard amp because it has effects on board, but I'm totally okay with the Hartke KM100 not having effects because I'll just use an outboard mixer or recording unit (like the Zoom R16) to run vocals through and get a little splash of reverb. For instrumental jazz you're basically done. Plug a keyboard (like the Yamaha arranger series that have drums bass and keyboard sounds) into the KM100 and maybe a sax mic and you're good to go! VERY happy with this purchase. Maybe down the road I'll use my Zoom H2 to record a duo/trio where I'm using it for the "PA" so you can at least hear a rough approximation of what it can do. Well done Hartke/Samson!!

Features
It lacks onboard effects, but that is not a problem if you handle your effects with outboard gear.

Ease of Use
VERY simple to use. Everything is intuitive.

Quality
The amp is constructed well. The 12" cone looks pretty rugged and well made.

Value
I bought mine used but I would pay full price for the quality I'm hearing.

Manufacturer Support
Haven't dealt with company yet.

Musical Background:
semi-pro gigging musician

Musical Style:
instrumental jazz and 70s vocals read less