Roland KC-110 30W 3-channel Stereo Keyboard Amp - Battery Power Option (Discontinued)
Roland claim that this 30 Watt amp is the world's first stereo keyboard amp that can be battery powered and I haven't seen anything to refute that.
It runs for up to 9 hours on 8 AA batteries - this includes rechargeable batteries.
It has 3 channels - the first has an XLR input for a microphone and the other two are line level inputs.
It also has reverb and chorus built in which can be controlled via an optional footswitch.
- Output Power: 15W + 15W when using an AC adapter, 10W + 10W when using Alkaline AA batteries.
- Number of Channels: 3.
- Inputs: Channel 1 has both XLR and 1/4" inputs, Channels 2 & 3 have 1/4" inputs, plus it also has Aux inputs with both RCA and 1/8" connectors, finally it has a 1/4" footswitch jack.
- Outputs: 1/4" line out and a 1/4" headphone jack.
- Speakers: 2 x 6.5" woofers and 2 Tweeters.
- Tone Control: 2 band EQ.
- Frequency Response: Not specified.
- Optional Battery Power: Yes - 8 AA batteries.
- Size: 12.6" x 16.6" x 9.6".
- Weight: 16.1 lbs..
- Manufacturer Warranty: Not specified.
As you might expect, this amp is extremely popular with street performers with just about every type of instrument that can be amplified. It is also well reviewed as a practice amp.
There were no consistent negatives reported, however an electronic drummer didn't like the treble saying it didn't reproduce the high frequencies to his liking on drums. There were also a couple of people who complained that it isn't very loud - but you can say the same about any 20 to 30 Watt amp.
Although this is a lot more expensive than the Behringer Ultratone KT108 which has a similar power rating, this is definitely the best and most versatile portable keyboard amp I found based upon customer feedback and expert reviews.