Kala Rumbler - Satin Brown

Short-scale Acoustic-electric Bass Travel Guitar with Mahogany Laminate Top, Back, and Sides, Mahogany Neck, Rosewood Fretboard, Onboard EQ, Built-in Tuner, and Custom Padded Gig Bag - Satin Brown
Kala Rumbler - Satin Brown image 1
Kala Rumbler - Satin Brown image 1
Sweetwater Savings: $60.00 MSRP: $419.00

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Kala Rumbler - Satin Brown
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Extremely Portable Acoustic-electric Bass

Kala brings you the Rumbler U-Bass acoustic-electric bass ukulele, so you can have the surprisingly deep, full bass tones of the U-Bass at a value-packed price. Custom electronics and special strings give the Rumbler U-Bass a voice much bigger than its pint-sized body would suggest. It has a piezo pickup, an active EQ, and a built-in tuner, so you'll always sound good. Special strings made by Aquila, exclusively for Kala, make this bass sound rich when played acoustically. But plug the Kala Rumbler U-Bass into your amp and you're in for a very sweet surprise.

Custom Kala electronics with active EQ make this U-Bass a real live performer

Introduced on the 2013 edition of the U-Bass, Kala's custom electronics give this Rumbler U-Bass a vibrant and punchy sound when you play plugged in. An active equalizer lets you tweak your tone, effortlessly meeting the needs of even the most demanding venues. What's more, Kala even equipped this U-Bass with an onboard tuner, which is an essential part of any musicians live kit.

Kala Rumbler U-Bass Acoustic-electric Bass Ukulele Features at a Glance:
  • A fun and massive-sounding acoustic-electric bass guitar that you can take anywhere
  • Compact 21"-scale, 16-fret fingerboard provides plenty of room to play
  • Fat, proprietary polymer strings, custom-made by Aquila Corde of Italy, deliver deep bass resonance
  • Laminate mahogany back, sides, and top provide warm and woody undertones with a balanced midrange
  • Separate compensated saddles for each string and die-cast tuners keep your tuning and intonation solid
  • Onboard piezo pickup with active equalizer provides exceptional sound in any live environment
  • Extremely portable (meets most carry-on standards)
  • Deluxe custom U-Bass padded gig bag included

Additional Media

Bass Guitar Buying Guide

Tech Specs

Number of Strings 4
Body Shape U-Bass
Body Style No Cutaway
Left-/Right-handed Right-handed
Color Natural
Finish Polyurethane
Top Wood Laminate Mahogany
Back & Sides Wood Laminated Mahogany
Fingerboard Material Rosewood
Fingerboard Inlay Custom Kala Inlay
Number of Frets 16
Scale Length 21"
Tuning Machines Custom Die-Cast Tuners
Bridge Material Rosewood
Strings Aquila Silver Rumbler UBASS strings
Manufacturer Part Number UBASS-RMBL-FSwBAG

Customer Reviews

Based on 5 reviews
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Amazing tone in a small package

Plugged this beauty and couldn't believe the sound I was hearing: rich deep bass with an upright reminiscense and clear well defined notes. You have to get used to the strings feeling and the action, but once you are there it's a pleasure to play. Original strings were ok, but a bit sticky. Put a set of Aquila Thundergut on it and tone and feeling improoved a lot. I use it throug a Markbass rig with a CMD 121P Combo and a Standard 151HR and the tone is just amazing. As a plus it is really easy to carry with the supplied soft bag, specially when you travel a lot like me and could check it as a carry on baggage.

Stellar sound

I am so thankful my Sweetwater rep led me to this amazing instrument. It is truly amazing!
Music background: Church musician


This Kala Rumbler is a kick in the pants to play ! Big sound from a tiny Bass . I was at Sweetwater looking for a new mandolin . I picked up the Kala just to check it out , I started playing it and I had to have it . next time you are in Sweetwater , stop by the Bass room and check it out . FUN , FUN ,FUN .
Music background: Been playing anything with strings for 40 years

Kala Rumbler

Very cool item, sounds like a upright bass through an amp, very impressive once you get used to the action, I like it, AAAA+
Music background: Semi Pro Musician

Good but bad

The good: well-built for the price; fun to play; tiny. The bad: it sounds terrible through an amp (and you really must play through an amp). The bass notes sound great, but everything else is grotesquely amplified, too--every slight movement of the instrument makes a sound like rustling paper, fingers on the strings thump and literally squeak. Very fun to fool around with, but I can't imagine every playing with other musicians or in front of an audience.
Music background: Uke Enthusiast

Sweetwater Advice

Kala U-Bass

The U-Bass is a well-designed, gig-worthy instrument, if somewhat of a novelty item. The build is solid, the components are topnotch, and it serves up sounds you can use in a variety of settings. ...
read more
See also: Kala, Kala 4-string Bass Guitars, Kala Acoustic Basses