Acid Jazz

The overall sound is good. My main concern is the lack of volume. It's very quite for a twin 50w amp. It can't match volume with similar small guitar and bass combos. Also the effectiveness of the EQ (bass midd treble) is quite limited with only what sounds like a very small change in the frequency of the sound

The amps main feature is it's stereo output which does really help bring keyboard patches to life. It lacks a master volume or any effect send/return features.

Very just plug in and play. It's lack of features makes use very straight forward

I took the back off mine and the wiring inside looks a bit on the cheap side, also the power amps have no real heat sink, they're just glued to the rear metal panel.

If it was louder and had a more effective EQ, it would be a good buy. As it is, I'm disappointed with this product.

They're easy to reach and friendly.

I'm planning to sell mine and get something with a more realistic volume for live gigs.

Active Musician

Acid Jazz and Funk

Excellent sound...for what it is. This is a 38 pound, compact, easy-to-transport amp. It's designed to sound great, but not at really high volume. Actually, if you run your keyboards into a good submixer and/or preamp first, you can really bring out the best in this amp, sonically. For its size, you can't beat it. In fact, for what it's designed for (smaller/lower volume gigs), it gets a "10" in the sound category.

Most useful features are definitely the compact size and the stereo outputs. The stereo expansion feature is also a good one -- it really "widens" the sound output.

Very easy to get a good sound. The bass frequencies drop off pretty dramatically, but it does have a subwoofer output if you need more low end onstage. I like the "component" approach -- where you can bring a powered sub if you need one, but if space is limited or gig volume doesn't demand it, you can travel light and leave the sub at home. This amp has basic, but useful, EQ settings and inputs, too.

I really like the fit/finish and build quality of this amp. The polymaric (truck bedliner) finish has held up well, and I'm confident it will continue to do so. The acoustic cloth covering is no more or less durable than other cloth coverings, so you need to be careful with it, but mine is snag-free after over 6 months of use. Some have purchased custom-made covers for this amp; I think that's a good idea.

It costs more, but it looks cooler and runs better -- just like most expensive cars, home theater systems, etc. You get what you pay for.

I have been able to get through to John Fisher, the president of the company, and have spoken with his wife (who's operations manager there) on a number of occasions. Both are very helpful, and want to help you sound your best. Motion Sound has gone as far as custom-fabricating parts for me (for my Motion Sound Pro 3t-m), and shipping them quickly for a reasonable rate. This is an excellent company if you're looking for service, support and good advice.

This is a must-have amp if, like me, you have several different keyboard rigs and amplification configurations to choose from and plan with. I use the KP-100S for smaller gigs, or even medium-sized gigs (with a mixer and/or preamp to beef up the sound). For larger gigs, I use something, well, larger (typically a Bose PAS system, or a combo amp/twin full range speaker setup with separate mixer/effects). In some cases in the past, I would play gigs with no onstage keyboard monitor. This was mainly due to space limitations, or travel-related constraints (no room to transport an amp due to air travel or limited van space). This amp is small enough to fit on compact stages or in smaller vehicles, so I can now at least hear myself onstage. For that reason alone, it's a great buy.

Active Musician/Recording Engineer/Producer

Rock/Trop Rock/Soul/Jazz