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Bass Guitars > Bass Guitars > Acoustic Basses > Kala U-Bass (4-string, Fretless, Mahogany)

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Kala U-Bass (4-string, Fretless, Mahogany) (No Longer Available)

Fretless Short-scale Acoustic Bass Travel Guitar with Solid Mahogany Body, Mahogany Neck, Rosewood Fingerboard, and Custom Hard-foam Case - Natural

Sorry, the Kala U-Bass (4-string, Fretless, Mahogany) is no longer available. We've left this page up for reference only. Check out the great alternatives on this page or call toll-free (800) 222-4700 to speak with a Sweetwater Sales Engineer about similar products.

From Our Research Team:

Extremely Portable Acoustic Bass!

Note: This is the fretless version.



The bass you can travel with! The Kala U-Bass sets a new sonic standard for "travel-sized" instruments. This little puppy is tuned in traditional bass tuning, it's sized to fit into the overhead compartment of an airplane, yet's it's packed with thick, rich acoustic bass tone. Many bass fanatics, in fact, feel that the U-Bass offers tones extremely close to the sound of an upright bass. So, what's the secret behind this portable, affordable bass gem's rich sound? We'd wager it's the gorgeous solid mahogany body, complemented by a solid mahogany neck, a rosewood fingerboard, and a rosewood bridge - these are well-respected, time-proven tonewoods.

Of course, the magic in the U-Bass is also in the details. Kala paid attention to the whole instrument, giving it a reliable set of custom Hipshot tuners plus an amazing-sounding Shadow pickup system for when you want to plug in and play.

Veterans of the electric bass guitar will love the Kala U-Bass's great sound, portability, and jam-ready design. This is also the perfect instrument for anyone accompanying an acoustic guitarist on the open mic or coffeehouse circuit. Throw in the included custom hard-foam case, and the Kala U-Bass is an absolute steal!

Kala U-Bass Acoustic-electric Bass Travel Guitar Features at a Glance:
  • Acoustic-electric bass travel guitar
  • This is the fretless version
  • Solid mahogany body and mahogany neck
  • Rosewood fingerboard and rosewood bridge
  • 20" scale, tuned to traditional EADG
  • Strung with proprietary polyurethane strings
  • Offers much of the sound of an upright bass
  • Extremely portable (meets carry-on standards)
  • Features custom hipshot tuners for tuning stability
  • Passive Shadow pickup system with 4 individual piezo elements

Here's a great-sounding acoustic bass you can take anywhere, the Kala U-BASS!
Specification Detail
Manufacturer Part Number KA-UBASS-FL

U-Bass (4-string, Fretless, Mahogany) Image Gallery

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Be the first to review this product

kala uke bass

by d osburn from Kansas City, MO
May 25, 2012
Music Background: working musician
Had the UBass for about 5 weeks now, and have been very pleased with it's overall peformance and sound and absolutely delighted with how light it is! I opted for the Mahogany topped fretless, which I ... read more [+]did have some difficulty locating, but Sweetwater came through and the reviews i read before purchase have all proved to be correct. Warm tone with amazing bottom end and a fat, thick sound without losing the woody quality. She doesn't have the slow tone decay of my traditional double-bass, but still a wonderful sound for such a light-weight little gal. Took about a week for the strings to settle in, and I had to trim an inch or so total off to avoid overstacking the post as they stretched, but she's stabalized now and requires no more dramatic tuning than my electric. The only issues which prevent her from being a full 5 star would be some very minor finishing issues that probably only I will ever notice. close [-]

Nice bass

by Bill from Mifflinburg, PA USA
July 17, 2012
Music Background: Amateur musician
The U-Bass is a terrific instrument (it's a serious bass with considerable authority when plugged in), and the fretless one has the added benefit of no fret buzz (given the small spaces between frets,... read more [+] and my fat fingers, this was a problem with my previous, fretted one). This one arrived with a slight scratch about a third of the way up the neck under the D string (which is the reason for 4, rather than 5, stars). Seems to play just fine, though. Highly recommended for any bass player who wants a serious acoustic thump, a bass that's very easy to travel with, or both. close [-]

Mixed Bass Bag...

by Thomas Mackey from Madison, WI
October 20, 2012
Music Background: Imaginary Entertainer
The pros: This thing sounds great. It's like a mini-upright, only without much sustain. Acoustically, perfect for playing late at night or in tiny apartments. Plugged in, or through my Vox headphon... read more [+]e amp, some pretty major bass from so little space. Run through an Art tube pre-amp into my MacBook, I get a great sound with minimum fuss. And finally, it's just addictive fun to play.

The cons: Build quality is pretty slipshod. On one I got, the body and binding are good; however, the neck and headstock look a bit, well, improvised. The neck is built from several pieces of wood, and the differences in color and grain are fairly blatant. Especially under the headstock veneer, where it looks as though an extra layer was added in under the veneer to bring the headstock to proper thickness. While the fingerboard is decent, several smudges of glue (one complete with fingerprint) mar the edges. Most serious, on close examination I note that the nut (which appears to be wood also) is not glued to the neck for over half of its width. I'm not yet sure what I'll do about that- perhaps carefully add some wood glue to fill the gap.

Unique to this instrument are the polyurethane strings, which take a bit of getting used to. Be prepared to spend at least a month playing a new U-Bass before the strings are fully broken in. Until then, you'll be tuning a lot. A whole lot. You'll also be rewinding the strings on the tuner posts several times as they stretch. While this is fairly simple on the E and A strings, the D and G strings need to be knotted under themselves to prevent slipping. The strings also have plastic bearings which (according to the instructions packaged with them) rest under the bridge plate when the strings are installed. However, Kala often installs the strings without the bearings. The Hipshot tuners work fine.

All in all, this is a unique instrument which is great fun to play, and a sound you may love. But the manufacturing quality seems a bit sketchy for the price. By way of comparison, my other bass is a Fender Kingman acoustic, also made in China, which cost about $90 less than the U-Bass. The build quality of the Fender is excellent, especially the neck and fretwork. I suppose part of the difference is due to the size of the respective companies; but I hope Kala will step up the quality.
I love playing the U-Bass; I just hope it holds together. close [-]

loose output socket (bottom of bass

by Frank Smith from Traverse City, MI USA
September 30, 2012
Music Background: Part-time pro musician. Travelling musician in the 50's fir a couple of years. Retired Electrical Engineer. 86 years old.
Good news..............impressive sound.
Bad news.................1/4 inch output socket on bottom of bass loosened about the second "outing" with my new U Bass. I managed to snug it up and hope ... read more [+]it lasts. close [-]

Best customer service Ive ever encountered. My guitar arrived ahead of the date it was supposed to, in flawless condition. Played well right out of the box. I will be buying all of my gear from you, from here on out. You made me feel like I was ordering a custom guitar, just for me. I was treated like a valuable customer.


Christopher , Sasvannah, GA
See Also: Kala , Kala Acoustic Basses , Kala 4-String Bass Guitars

Kala U-Bass (4-string, Fretless, Mahogany)

Today's Payment: $193.33
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