Motion Sound KeyPro KP-100S - 100W 2x8" Keyboard Amp

100-watt Stereo Keyboard Amp with Spatial Expander
Motion Sound KeyPro KP-100S - 100W 2x8
Motion Sound KeyPro KP-100S - 100W 2x8
Sweetwater Savings: $246.00 MSRP: $995.00
Special Order
Special-ordered from Motion Sound and usually arrives to you within 1-2 weeks. Please note: special orders cannot be canceled or returned.
Note: While most of the items we sell ship for free, this item does not qualify for free shipping due to special circumstances.

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Motion Sound KeyPro KP-100S - 100W 2x8" Keyboard Amp
Special Order

Now In Stereo!

The KP-100S, like its big brother KP-200S, delivers 3D stereo sound in a compact package. The unique angled cabinet design provides wide sound dispersion and when coupled with the spatial expander allows for a true stereo image.

  • 100 Watts RMS - 50 Watts per channel
  • 2 x 8" 100 Watt Eminence speakers
  • 2 x 3.5" Ferro Cooled dynamic horns
  • Spatial Expander
  • One channel with two pairs of 1/4" inputs
  • XLR and 1/4" mic input with volume control
  • Subwoofer line output
  • XLR left and right outputs

What Does "Special Order" Mean?

A special-order product is one that we don't normally keep in stock. We order it from the manufacturer as soon as you order from us. We have great relationships with all the manufacturers we carry, so we can get your special order to you as fast as or faster than anyone else. Remember that special orders are non-returnable and non-cancelable, so make sure the item is right for you. A Sweetwater Sales Engineer can help you decide — call (800) 222-4700 for assistance!

Additional Media

Keyboard Amp Buying Guide

Tech Specs

Speaker Size 2 x 8", 2 x 3.5"
Total Power 2 x 50W
Inputs 2 x TS, 1 x TRS, 1 x XLR
Outputs 1 x TS, 2 x XLR
Frequency Range 70Hz-17kHz
Enclosure Material MDF
Mounting Options Floor
Height 15"
Width 19"
Depth 13"
Weight 38 lbs.
Manufacturer Part Number KP-100S

Customer Reviews

Based on 3 reviews
Write your review

Great little amp with the right speakers.

The KeyPro K-100s is a great little workhorse of an amp, but it took months of playing before I blew out the Eminence Alpha 8" woofers that come with this amp. It should have happened sooner. After browsing around several forums and reading opinions I opted to replace the Eminence Alpha speakers with Eminence Betas and that did the trick. Better tone, more power handling, less distortion. Good stereo separation and tone control, plus the 3D spatial enhancer that gives the stereo effect more depth. I play a Hammond SK2 through this and mostly used it for my personal monitor and run direct lines to the FOH. Easy to setup and use, small footprint, and my bandmates love it. Too bad it comes with such low-life speakers but it's an easy task to upgrade them and make this the amp it's meant to be.
Music background: 45+ years pro stage experience

Great amp, but...

This is the best-sounding amp I have ever owned (along with the KP-200S, which I also own). The problem is that both of these amps have developed serious problems over time, and it is impossible to get them repaired! The company is supposedly active, but no repair tech seems to be able to get parts, schematics, or even an email out of them. Too bad! You'll love the sound, but buying a boutique item has its drawbacks....
Music background: pro musician

Just What I Need....

I always insisted on a stereo sound and am glad someone has thought this concept up. I don't need much volume, but do need a good sound and stereo imaging. This little puppy is amazing for it's size and weight. The stereo imaging hardware installed does a convincing job. Just turn the 'expand' knob and the left and right speakers seem to spread out across the stage. Granted, it's not quite as convincing as having separate speakers on each side of the stage, but it's pretty close and in my estimation, quite satisfying. My only complaint is that it doesn't have much bottom end and overall volume is a bit weak, but, then, it is only 100W total. I use the subwoofer output on back and leave the bottom end to a separate 100W subwoofer cabinet. Combined, they produce decent volume.
Music background: Keyboards

Sweetwater Advice

Nick Schenkel

Playing a keyboard through a mono amp is like watching a 3-D movie with one eye closed; it totally misses the point. Motion Sound makes some of the best-sounding stereo keyboard amps I've seen (or heard). You owe it to yourself, your keyboard, and your sounds to plug into one and hear what you've been missing.
See also: Keyboard Amps, Motion Sound, Motion Sound Keyboard Amplifiers