Pricing and availability
We compare 600+ stores and found this item at 4 stores. Prices updated .
Store
Reviews
Price
Average Price: $376
Standard/Professional
$100
$401+
Price Tier
Budget
Standard
High-end
Price History
Based on price data from 2 merchants for "Kala U-Bass Rumbler Mahogany". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.
Description
Unveiling a compact powerhouse, the Kala U-Bass Rumbler Mahogany redefines what you thought possible from a bass ukulele. This acoustic-electric marvel offers surprisingly deep, full bass tones that belie its petite size. Crafted with a laminate mahogany body, it delivers warm, woody undertones and a balanced midrange, reminiscent of an upright bass with a unique U-Bass twist. The custom Kala electronics with an active EQ and onboard tuner ensure that each note resonates with clarity and precision, whether you're in the studio or on stage.
What sets the Rumbler apart are the proprietary Aquila Silver Rumbler Strings, designed to produce a rich, resonant sound that fills any room. The 21"-scale, 16-fret fingerboard offers comfortable playability, while die-cast tuners and separate compensated saddles guarantee your tuning remains rock-solid. Portable enough to meet most carry-on standards, this U-Bass is ready to accompany you on any musical journey.
Whether you’re jamming at home or performing live, plug in this little beast using its piezo pickup, and prepare to be amazed by its massive sound. Plus, with a deluxe custom padded gig bag included, your Kala U-Bass Rumbler Mahogany is always ready to hit the road with you.
Key Features:
- Acoustic-electric bass ukulele with compact 21"-scale and 16-fret fingerboard
- Laminate mahogany body for warm, balanced tones
- Custom Kala electronics with active EQ and onboard tuner
- Proprietary Aquila Silver Rumbler Strings for rich, deep sound
- Onboard piezo pickup for exceptional live sound
- Die-cast tuners and separate compensated saddles for stable tuning
- Includes deluxe custom U-Bass padded gig bag
Product specs
| Brand | Kala |
| Model | RMBL-FS U-Bass Rumbler Fretted Acoustic Electric Ukulele Bass |
| Finish | Satin Brown |
| Year | 2010s |
| Categories | 4-String Basses, Acoustic Bass Guitars |
| Active / Passive Pickups | Active Pickups |
| Active Preamp | Active Preamp |
| Body Shape | Mini |
| Color Family | Brown |
| Fretboard Material | Walnut |
| Number of Frets | 16 |
| Number of Strings | 4-String |
| Right / Left Handed | Right Handed |
FAQs
-
What type of wood is used in the construction of the Kala U-Bass Rumbler?
-
The Kala U-Bass Rumbler features a laminate mahogany back and sides, with a mahogany neck and a rosewood fingerboard and bridge, offering a warm and resonant tone.
-
How does the Kala U-Bass Rumbler's size affect its playability and portability?
-
With a 21-inch scale and mini body shape, the Kala U-Bass Rumbler is compact and easy to transport, making it ideal for travel and convenient for players with smaller hands.
-
Does the Kala U-Bass Rumbler come with built-in electronics?
-
Yes, the Kala U-Bass Rumbler is equipped with an active electronic system, including an active EQ and built-in tuner, allowing for easy amplification and precise tuning.
-
Are the Kala Silver Rumbler Strings suitable for this bass?
-
The Kala U-Bass Rumbler comes with Kala Silver Rumbler Strings, which are specifically designed to complement this instrument, providing a balanced tone and comfortable playability.
-
Is the Kala U-Bass Rumbler suitable for air travel?
-
Yes, the Kala U-Bass Rumbler meets most airline carry-on requirements and includes a Deluxe U-Bass Embroidered Gig Bag, making it a convenient choice for traveling musicians.
Videos
kalabrandmusic
Kala Rumbler U•BASS
Reviews
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Kala U-Bass Rumbler Mahogany.
Build quality
Features and functionality
-
The Rumbler model's pickup section is similar to more expensive models, lacking only a built-in tuner.
Source
Use cases and applications
-
Ideal for folk music, but less effective for styles requiring defined bending, slapping, and popping.
Source -
Owners find the Kala U-Bass suitable for tight stage spaces and gigs where portability is crucial, offering a unique blend of stand-up and electric bass tones.
Source -
Owners appreciate the U-Bass for casual use, like couch playing and travel, due to its compact size and acoustic sound.
Source
User experience
-
The short scale is noted to be easier for mandolin players, but may not suit those accustomed to full-scale bass guitars.
Source -
Fretless models are preferred by some due to reduced fret buzz compared to fretted versions, enhancing the overall playing experience.
Source -
Heavy action is noted as a downside for some users, potentially affecting playability, especially for novices or those used to lower action instruments.
Source -
Roundwound strings can cause squeaky slide noise; some prefer Kala's flatwounds despite requiring nut filing for proper fit.
Source
Setup and maintenance
Mods and upgrades
-
Switching to roundwound strings demands a different nut, but allows the U-Bass to mimic traditional electric bass playability, though it alters the deep double bass sound.
Source -
Aquila Thunder Reds are suggested for improved tone; they're waxier than stock strings, offering a unique feel and lasting up to two years.
Source -
LaBella Silverback strings enhance intonation and feel, requiring only a truss rod adjustment for optimal performance.
Source
5.0 out of 5
Based on 1 Review and 2 Ratings
Artist usage
Add artist
Jacob and his bassist are seen in this video playing the Kala Wanderer U-Bass. (Model can be identified based on wood type and binding)
You can also see him playing it in the video "Jacob Collier - Boogie On Reggae Woman (on the U-Bass)" [*]. The bass is very visible throughout the entire video.
[*] https://www.youtube.com/watch?v=fDy20irhd6o&ab_channel=JacobCollier
Album Usage
The Kala U-Bass Rumbler Mahogany has been featured on the following albums:
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use Kala U-Bass Rumbler Mahogany, it is most commonly used with the following gear.
More Kala Ukuleles
Accessories & Related Items
Community setups
Similar
Gear Guides
Most Popular Ukuleles
Most Popular Brands
-
Added to Equipboard on by
mewtwoberGear IQ 101
-