

🎵 Elevate your bass game with the smoothest jazz strings in Vienna’s finest tradition!
Thomastik-Infeld Bass Guitar Strings are premium flatwound nickel strings designed for electric bassists seeking the rich, warm tone of traditional jazz. Featuring a ribbon flatwound nickel alloy wrap, silk inlay, and a pliable steel roundcore, these strings deliver smooth playability, balanced medium gauges (.043-.100), and long-lasting durability. Crafted in Vienna, they offer consistent tension and superior clarity, making them the go-to choice for professional musicians demanding vintage warmth with modern flexibility.




| ASIN | B00162ZSW6 |
| Best Sellers Rank | #6,776 in Musical Instruments ( See Top 100 in Musical Instruments ) #38 in Bass Guitar Strings |
| Body Material | Nickel |
| Color Name | Natural |
| Customer Reviews | 4.8 4.8 out of 5 stars (685) |
| Date First Available | March 17, 2008 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4 ounces |
| Item model number | JF344 |
| Material Type | Nickel |
| Number of Strings | 4 |
| Product Dimensions | 6 x 6 x 1 inches |
| Size | long scale 34" |
| String Gauge | Medium |
| String Material | Nickel Steel |
J**R
The best.
The very best bass strings you can buy. Excellent tone, perfect intonation, and they last for years. Low tension at pitch makes them easy to play. Thomastik-Infeld has been making strings for the most demanding musicians - orchestral string players - for over 100 years and it shows. I had a new bass coming, and I ordered these to make sure the new instrument would sound as good as it can.
L**D
Tomastik Jazz Bass Flatwound Strings
I needed to get some flat wound strings for my MusicMan Big Al bass. I had just sold the Precision which had Fender flat wound strings, the Big Al still had the Ernie Ball round wound strings that it came with, ok strings but not for me. I checked around on the web and asked friends to find out what was recommended, I thought there might be something better than the Fender flats. Thomastik came up more than anything else so I got some. The Big Al has passive and active circuit options that allows you to dial in any kind of sound. I use a David Eden World Traveler combo that will reproduce anything the instrument delivers with clean power and control. I actually tried the new strings out with a couple of the Ernie Ball round wounds still left on to compare, before putting all of them on. The Thomastik flat wound strings have a full, singing tone that I hear in my head and want my bass to have. With the full tone one can achieve the bright tones that round wounds produce, the deep bassy tones for recording and stage and everything in between with no gaps. There is no change of tone when going from string to string and likewise with the sustain. Each string acts and plays like all the others. Since the Big Al also gets a wide variety of sounds, these strings are an excellent match. The smoothness of the strings are the best part. If you are playing for hours at a time, the Tomastiks will not fatigue your fingers or tear up the frets. Also, if you want to set the action low, these strings will not mind. If you just cannot get the sound you want from your strings (and you have a decent quality of an instrument) I would say give these strings a try. If you like round wound sound and your bass has an active circuit, you may be able to get by with these flats, otherwise Thomastik does produce round wound sets. I expect to get years of use from a set so the higher cost will balance out over the years. The only caveat from me is the G string broke off several times when making a right angle turn in the machine head, they are kid of soft. I ended up just using a figure S around the slot to get it started. Make sure you start off with enough length and to wind it properly down from the nut.
J**.
The “Rolls Royce” of Bass Strings — Carol Kaye Was Right
After trying several flatwound sets over the years, the Thomastik-Infeld Jazz Flats (JF344) stand out as something very special. I still believe LaBellas are unbeatable for that classic Motown thump, but for almost everything else I’d choose these. They have a "singing" clarity that feels almost effortless—likely due to the lower tension which I normally don't like. The nickel wrap gives them a soft, silky texture that’s unlike any other flatwound I’ve tried. They’re incredibly comfortable but not flimsy. Carol Kaye called these the “Rolls Royce of bass strings,” and after playing them, I agree. Every time I pick up my Precision with JF344s, I’m inspired. Truly amazing strings.
J**.
Excellent for Jazz Bass
First of all, these are very lovely strings to play because of their relatively low tension. I don’t think they are as smooth as other flatwounds but the gauges of the strings are incredibly well balanced. They have a distinct mid range growl that other flats don’t have. I would say it splits the difference between the sound of a flatwound and a roundwound. However I don’t think these sound that great on a Precision Bass. It’s almost too much midrange for me, but if that’s your thing, you may love it. Instead I put them on my 1960 Jazz Bass and it is heavenly. The midrange of these strings compliment the sort of flat and scooped sound profile of a Jazz Bass. If there is a drawback I would say I noticed a bit more “artifact” noise with these than other flatwounds as well when new. This is things like clacking, finger noise, etc. They have been in my Jazz Bass for several years now and I absolutely adore them.
B**U
The best strings for bass guitar on the planet
The best string for bass guitar on the planet. Not sure if there may be a better string in another galaxy but here in on earth these are the best. Now they will go on both my basses. I have tried alot of strings until I came to these. The tone they produce is magic. Don't be put off by the price, they are cheaper than other strings? How can i say that? Two reasons first is if you add up all the money I spent fumbling around with other sets of stings, I could have bought these from the start and I would have been money ahead. Second these will stay on your bass for a long time because they wear IN over time while other stings wear OUT. They will sweeten with age and they will really gel with your neck over time. Constantly changing strings doesn't allow this merging together to happen. Finally the feel if these strings is fantastic, they make you really want to play. They are super smooth and loose, a pleasure to play on them. I highly recommend these strings
J**O
Tension is generally lower than most strings and this is great if you find your technique digging in a lot
After playing many different flats for a time, decided to finally give these a chance. It's taken at least two months to break them in (very bright at first -- fair warning), but man, is it worth it. They have a brightness similar to hybrid rounds and/or steel flats, but not too much. High mids right out of the box and they've evened out over time with the lower strings becoming at tad thumpier, to my liking. The feel is very smooth and well tapered from string to string. Tension is generally lower than most strings and this is great if you find your technique digging in a lot, like I did with thick LaBella's. Breezy 16th notes here we come! The overall tone is matched evenly as well. Exceptional and absolutely worth the price.
Y**7
あのピノパラディーノが使っているとのことで試しに購入し、もちろんプレべに張ってます。 個人的には知っているベース弦でダントツでテンションが緩いです笑 まあ好みは別れますが触ってれば慣れます。スラップしやすいです。 フラット特有の硬さが苦手な人、フラット張るとベースのネックが反っちゃうって人にはいいかもしれません。 音は良くも悪くもフラットの音です。使い始めはブライトな印象でしたが、弾き込めば落ち着きます。 【追記】 張ってからほぼ毎日弾いて約一年経ちます。新品の倍音が取れた、いわゆる死んだ状態でも音程感が損なわれることなく、さらに迫力が増したような印象です。 アコースティックからロックまで、まんべんなく馴染みます。 【追記2】 張ってから2年経過しました。 ライブにレコーディングに、セッションや練習まで酷使しています。 手入れはたまにクロスで拭く程度ですが錆びるようなこともなく、音の劣化も感じません。タフです。 【追記3】 張って3年と2日で2弦が切れました。 音の劣化は最後までなかったので満足です。
P**U
These are the smoothest set of bass strings that I have ever owned. Great tone and incredible playability. Simply great set of strings.
Y**I
Montées sur ma Fender Jazz Bass Marcus Miller elles montres agréables à jouer
B**A
Excellent strings but...Advertised as suitable for the "Beatle bass" but they are not suitable for the Hofner Ignition Club "Beatle" bass! The E and G string are too long. The quality of the strings is excellent when they are the correct fit for your guitar. But I wanted them for my "Beatle bass" I was super disappointed that they don't actually fit as advertised. If you want the perfect flatwounds for your Hofner ignition club bass, search for "LaBella 760FHB2" which are specifically designed for you Hofner and are awesome!
B**R
These strings are sound great. Arguably one of the best flatwound strings ever made. Warm tone. A joy to play and they get better with age.
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