Man is this amp big!

I purchased a guitar synth recently from Sweetwater that sounded poor through our Fishman Loudbox acoustic amp. Roland recommended a keyboard amp or PA...

...So, I bit the bullet and purchased the KB4 from Sweetwater using their 10% gift card discount.

First impression...Man is this box huge. It dwarfs the Loudbox. Weighs a ton (80 pounds +/-). Thank heavens it has rear casters and a pull-up handle. Kinda wish it had casters at all corners. It is a beast to move around. Good thing I am a big guy!

Regarding Sound Quality...

The before-mentioned synth sounds great through the KB4, even given that the KB4 is not a "stereo" amp.

My modelers (amp and effects) also sound great through the KB4.

And my steel and nylon guitars sound great through it. Ironically, the only instrument I have not tried (yet) is a keyboard!

The KB4 has a bold, somewhat bass-leaning, crisp and tight sound. No muddiness at all. Just an in your face, clear, hum-free, buzz-free sound. I am very impressed.

Connections
I like the mixer. I could use one more set of stereo line inputs (like the KB5). But it handles three sets of stereo inputs which is probably enough for most folks.

I chose the KB4 over the Roland models because the KB4 offers send/receive connections. The KB4 and Rolands do not have effects, reverb, nothing. So, I wanted the send/return for outboard effects. Also, the KB4 offers XLR balanced L/R output connections for a PA, mixer, etc. The similar Roland model does not.

There are a couple of cons:
1. I could use one more set of stereo inputs.
2. No ability to chain another keyboard amp for a left/right stereo setup.
3. Master volume pot is stiff.

Summary
I highly recommend this amp for its clear, faithful, in your face sound, its quality reproduction of the synth and amp modeler outputs, its mixer-connectivity options, and the low price. And it is an impressive (and massive) acoustic guitar amp.