Kala UBASS-RMBL-FS Rumbler Mahogany Acoustic-Electric U•BASS®

The Kala UBASS-RMBL-FS Rumbler is one of Kala’s most acclaimed ukuleles, designed for players who want deep, resonant bass tones in a portable, lightweight instrument. Crafted with a mahogany top, back, and sides, this U•BASS® delivers a warm and balanced tone with impressive projection. Featuring an elegant satin finish, black binding, and a rosewood fingerboard, it offers both visual appeal and exceptional playability. Equipped with Fishman U•BASS® EQ electronics, the Rumbler provides superior amplified sound for stage or studio. Whether you’re a professional bassist or a ukulele enthusiast, the Rumbler Mahogany U•BASS® is a versatile and reliable choice.

Key Features

• Mahogany body and neck – Produces warm, resonant bass tones with natural sustain.
• Satin finish with black binding – Adds a classic, elegant look.
• Fishman U•BASS® EQ electronics – Delivers professional-quality amplified sound.
• Rosewood fingerboard – Smooth playability and comfortable fretting.
• Silver Rumbler by Aquila® strings – Specially designed for powerful, bass-like tones.
• Custom black die-cast tuners – Offer precise and stable tuning.
• Lightweight and portable – Ideal for travel, practice, or live performance.
• Includes a padded gig bag – Protects your instrument on the go.
• Truss rod-equipped neck – Easy adjustments for perfect playability.

Specifications

• Top: Mahogany
• Back & Sides: Mahogany
• Binding: Black
• Neck: Mahogany
• Fingerboard: Rosewood
• Headstock: Standard
• Finish: Satin
• Nut: Graph Tech TUSQ®
• Saddle: Composite
• Tuners: Custom Black Die Cast
• Truss Rod: Yes
• Strings: Silver Rumbler by Aquila®
• Electronics: Fishman U•BASS® EQ
• Strap Button: Black x1

Measurements

• Scale Length: 20.375 inches
• Overall Instrument Length: 29.375 inches
• Body Length: 14.031 inches
• Number of Frets: 16
• Upper Bout Width: 7.75 inches
• Lower Bout Width: 10.25 inches
• Waist Width: 6.625 inches
• Body Depth: 3.25 inches
• Fingerboard Width at Nut: 1.75 inches
• Fingerboard Width at Neck/Body Joint: 2.125 inches

• Free shipping to UK mainland & Channel Islands (Courier Service) on all orders.
• International Shipping to anywhere outside of the UK mainland & Channel Islands is £50 - £80 per package.
• Please note, all items shipped are fully trackable & insured.

Does this instrument come pre-tuned?

We quality-check and tune all instruments before shipping, but some minor tuning may be required upon arrival.

Do you offer beginner lessons for this instrument?

Yes! We provide online and in-person lessons through "Lessons with Morgan" for players of all skill levels.

Does this instrument come with a warranty?

Yes, most instruments include a manufacturer’s warranty covering defects in materials and craftsmanship.

What is the return policy for this instrument?

We offer a 14-day return policy as long as the instrument is unused and in its original packaging.

Can I finance my purchase?

Yes, we offer PAYPAL Pay in 3 & Klarna payment plans so you can spread the cost over time. Check out our financing options at checkout.