Kala U-Bass Flatwound vs. Roundwound vs. Rubber Strings Comparison

This video compares and contrasts Round Wound, Flat Wound, and Rubber (technically polyurethane) strings for the Kala U-Bass. First is a demo of all three strings back to back, then I compare and contrast them based on: string tension, slide-ability, tone, string noise, price difference, and I provide some alternative strings.

To find out more about each string and where to buy them:

For the U-Basses:

*All of the Amazon links above are affiliate links. This means that buying through these links supports the channel.

00:00 Intro
0:27 Plugged In "Rubber Strings" (Polyurethane) - Aquila Thunderguts
0:35 Plugged In "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
0:43 Plugged In "Flat Wound Strings" - Kala/Galli Strings
0:51 Plugged In 2 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
1:02 Plugged In 2 "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
1:12 Plugged In 2 "Flat Wound Strings" - Kala/Galli Strings
1:22 Plugged In 3 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
1:32 Plugged In 3 "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
1:43 Plugged In 3 "Flat Wound Strings" - Kala/Galli Strings
1:53 Plugged In 4 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
2:00 Plugged In 4 "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
2:06 Plugged In 4 "Flat Wound Strings" - Kala/Galli Strings
2:13 Plugged In 5 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
2:16 Plugged In 5 "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
2:20 Plugged In 5 "Flat Wound Strings" - Kala/Galli Strings
2:24 Plugged In 6 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
2:38 Plugged In 6 "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
2:49 Plugged In 6 "Flat Wound Strings" - Kala/Galli Strings
2:58 Testing them Acousticly (Unplugged)
3:00 Unplugged "Rubber Strings" (Polyurethane) - Aquila Thunderguts
3:08 Unplugged "Metal Round Wound Strings" - Kala Silver Plated
3:15 Unplugged "Flat Wound Strings" - Kala/Galli Strings
3:22 Unplugged 2 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
3:29 Unplugged 2 "Metal Round Wound Strings" - Kala Silver Plated
3:35 Unplugged 2 "Flat Wound Strings" - Kala/Galli Strings
3:41 Unplugged 3 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
3:44 Unplugged 3 "Metal Round Wound Strings" - Kala Silver Plated
3:47 Unplugged 3 "Flat Wound Strings" - Kala/Galli Strings
3:51 Unplugged 4 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
3:55 Unplugged 4 "Metal Round Wound Strings" - Kala Silver Plated
4:02 Unplugged 4 "Flat Wound Strings" - Kala/Galli Strings
4:07 Talking about Differences between the Strings
4:12 String Tension "Rubber Strings" (Polyurethane) - Aquila Thunderguts
4:34 String Tension "Metal Round Wound Strings" - Kala Silver Plated
4:54 String Tension "Flat Wound Strings" - Kala/Galli Strings
5:13 Sliding "Flat Wound Strings" - Kala/Galli Strings
5:41 Sliding "Metal Round Wound Strings" - Kala Silver Plated
6:05 Sliding "Rubber Strings" (Polyurethane) - Aquila Thunderguts
6:49 Tone
7:42 String Noise "Rubber Strings" (Polyurethane) - Aquila Thunderguts
8:27 String Noise "Metal Round Wound Strings" - Kala Silver Plated
8:48 String Noise "Flat Wound Strings" - Kala/Galli Strings
9:37 Pricing
10:22 Alternatives - Galli Round Wounds, Kala Pahoehoes, Aquila Thunder Reds
11:20 Outro

[Sonstwer]

Thank you for this second great review.
As an act of appreciation i made timestamps for you, feel free to use them (and/or adapt them)

00:00 Intro
0:27 Plugged In "Rubber Strings" (Polyurethane) - Aquila Thunderguts
0:35 Plugged In "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
0:43 Plugged In "Flat Wound Strings" - Kala/Galli Strings
0:51 Plugged In 2 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
1:02 Plugged In 2 "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
1:12 Plugged In 2 "Flat Wound Strings" - Kala/Galli Strings
1:22 Plugged In 3 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
1:32 Plugged In 3 "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
1:43 Plugged In 3 "Flat Wound Strings" - Kala/Galli Strings
1:53 Plugged In 4 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
2:00 Plugged In 4 "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
2:06 Plugged In 4 "Flat Wound Strings" - Kala/Galli Strings
2:13 Plugged In 5 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
2:16 Plugged In 5 "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
2:20 Plugged In 5 "Flat Wound Strings" - Kala/Galli Strings
2:24 Plugged In 6 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
2:38 Plugged In 6 "Metal Round Wound Strings" - Kala Silver Plated Round Wounds
2:49 Plugged In 6 "Flat Wound Strings" - Kala/Galli Strings
2:58 Testing them Acousticly (Unplugged)
3:00 Unplugged "Rubber Strings" (Polyurethane) - Aquila Thunderguts
3:08 Unplugged "Metal Round Wound Strings" - Kala Silver Plated
3:15 Unplugged "Flat Wound Strings" - Kala/Galli Strings
3:22 Unplugged 2 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
3:29 Unplugged 2 "Metal Round Wound Strings" - Kala Silver Plated
3:35 Unplugged 2 "Flat Wound Strings" - Kala/Galli Strings
3:41 Unplugged 3 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
3:44 Unplugged 3 "Metal Round Wound Strings" - Kala Silver Plated
3:47 Unplugged 3 "Flat Wound Strings" - Kala/Galli Strings
3:51 Unplugged 4 "Rubber Strings" (Polyurethane) - Aquila Thunderguts
3:55 Unplugged 4 "Metal Round Wound Strings" - Kala Silver Plated
4:02 Unplugged 4 "Flat Wound Strings" - Kala/Galli Strings
4:07 Talking about Differences between the Strings
4:12 String Tension "Rubber Strings" (Polyurethane) - Aquila Thunderguts
4:34 String Tension "Metal Round Wound Strings" - Kala Silver Plated
4:54 String Tension "Flat Wound Strings" - Kala/Galli Strings
5:13 Sliding "Flat Wound Strings" - Kala/Galli Strings
5:41 Sliding "Metal Round Wound Strings" - Kala Silver Plated
6:05 Sliding "Rubber Strings" (Polyurethane) - Aquila Thunderguts
6:49 Tone
7:42 String Noise "Rubber Strings" (Polyurethane) - Aquila Thunderguts
8:27 String Noise "Metal Round Wound Strings" - Kala Silver Plated
8:48 String Noise "Flat Wound Strings" - Kala/Galli Strings
9:37 Pricing
10:22 Alternatives - Galli Round Wounds, Kala Pahoehoes, Aquila Thunder Reds
11:20 Outro

[EnforcerX]

For such a niche community like the U-Bass one, you make a surprising amount of quality and informative content. As someone who is looking to start, you answered so many of my basic questions that I thought would be impossible to find. Keep up the great work man.

[kenstephanie]

Thunder reds are high-tech. Formerly the only way to make a string deeper was to increase the diameter but these strings have in increased density by adding copper to the formula. They have a much more full sound, and are not sticky so they have less finger noise.

[AllbeeHivezChristianAllbee]

I definitely liked the sound of the flats best. If I ever get a U-Bass (or any copy thereof), flats will be going on it.

[narcolept]

I saw someone asked about "is it possible to change from Roundwound to Rubber Strings" then I have the same question, so I asked Kala's support, their answer is - "The only issue would be the size of the nut and the holes in the bridge. The rubber strings are larger and may need both the nut widened and the bridge holes drilled out. The neck can handle the tension of either but it may need truss rod adjustments." So I am just posting here and I hope this information is useful :)

[henryschoolcraft]

you can really tell the time and effort you put into your videos and that you really care about giving us fair standpoints. thanks man

[TJMunich]

Great review. No story telling-bullshit upfront but an overview was given first and then you came up with some playable basslines that are then covered on each version of strings so that actual reproducable comparison was achieved.
Thanks. Very helpful! If every review on youtube was so straight forward. Billions of GB on harddrives and a lot of time would have been saved. Best Regards

[jlwnbnp]

Flats sound great, no wonder they're more expensive. would like to see a review of the nylon wounds. Which is the perfect travel /camping/ beach bass???

[frien_d]

I removed roundwounds from every actual bass I have and went for flatwounds, but now I'll be putting them on my rubber-stringed ubass.

Because I crave that volume.

[andrewcollins]

Many thanks for the comparison. It's really helped me decide to stick (no pun intended) with the polyurethane strings originally fitted to my Laka ukulele bass, as they really are best for the upright bass tone I bought it for.

[pepperlipapp]

Thank you for the effort and the time you have taken for this video! I like the sound of the flatwounds best!

[Lovlygod]

Thanks for the very analytical comparison. Finally someone that knows how to explain differences.

[cameronhirsch]

I've got the striped ebony with round wound strings on the way, but I think flat wound will be my next purchase. Thanks for making informative videos, your channel helped me decide to purchase a u-bass to learn on.

[kentrussell]

I have the rubber strings on my Ubass and I solved the "sticky" problem with String Fuel from Music Nomad. I like it better than Finger Ease because you don't spray it on the strings. I can slide without detuning the note.

[paulemersun]

Great video! I'm just getting ready to own one of these things and this was super useful in making my decision. Thanks!

[jellyfishinterrupted]

Reality check: I have the red kala ubass with round wounds. If you already play a normal bass, in NO way are you going to 'rip your skin' with round wounds. The feel is in no way more rough than normal round wound bass strings. The round wounds are absolutely amazing. The sound is kinda like a hybrid between a very good Precision bass and a double bass

[grpl]

Thanks for doing this comprehensive review on string types. My EKO Fretless U-bass came with Aquila Thunderguts and although it sounded warm and mellow, I had a couple of issues with them. As you said, sliding up on the strings affected the intonation, this seems to be unavoidable. The other issue for me was my fingers tended to stick on the strings. I had no intention of putting lubricant or powder on the strings, so I ended up wearing thin cotton gloves, a bit like Scott does. I play an Epiphone EB3 with Rotosound flatwound Jazz bass strings which slide and produce a warm tone. With that in mind, saved up and got a set of Galli black nylon wrapped flatwounds. They solved both my issues and play well, especially when amplified. The only downside is they are much quieter if unplugged.

[jinggaddi]

Thank you so much for this extensive discussion on the difference between these 3 types of strings. I just ordered my Aquila Thunderguts and am very excited to try them out.

[selliantuttimusi]

Now this is what I call informative content. Thank you!

[andyswain]

Think I'll still use my rubber strings, as they give the natural bass sound. If the price were lower, I might have tried the flatwound, to give a bit more of an electric bass sound, with less scratchiness than the round strings.