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Thomastik-Infeld Electric Bass Nickel Flat Wound Roundcore 6 String, .033 - .136, JF346

Thomastik-Infeld Electric Bass Nickel Flat Wound Roundcore 6 String, .033 - .136, JF346
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8 Reviews
75% (6)
25% (2)
0% (0)
0% (0)
0% (0)
13% Recommend this product (1 of 8 responses)
By Nick
Minneapolis, Minnesota
String tension may be an issue
March 12, 2019
If you're looking for a string that's like a hybrid between a roundwound and a flatwound, these are worth checking out. They're the brightest sounding flatwound strings I've ever heard, and I was even able to get them to work in a punk recording. However, on the bass I tried them on (a Spector Legend 6), I thought the A string sounded anemic. The low B was not that great either, but workable. As far as flats go, I think D'Addario Chromes have a better sounding B. If Thomastik-Infeld bumped up the gauge of their A string to about a .075 or .077, I think Jazz Flats would be the best bass strings in the world. Of course, the extreme price of these strings is an issue too.
Very bright for flatwound strings - cuts through the mix easily Easier to play because of low string tension Expensive Some strings might lack bottom end of because of light gauges
By Ariel A.
March 3, 2011
I've tried these for a couple of weeks and I'm so happy whit them. Ive tried DR flats before on my Warwick Corvette $$ 6 string fretless and the same day I take them away off and replace with D'Addario round nickel, that's why I decided spend a extra bucks and try a set of TI. Actually I bought two sets of these because in the first place it is literally impossible to fine flatwounds here for 6 strings basses, and second because I had great expectations for these and you know something....I'm not disappointed at all. Thank you all at JustStrings.
By hdfixer
Amazing Sound
September 15, 2010
I was a little afraid of the massive diameter of the B string in this set. It was tough to tune for the first week or two. But everything is settled in now. These strings are truly amazing. Terrific robust and articulate sound. I'll definitely buy these again. Only downside is that they are a little "draggy" and need to be lubed - if they came is S/S I would buy those instead as I think S/S feels a little slicker. But don't hesitate to give these a try - worth the money!
By Escofhari
TI Flatwounds
June 2, 2010
Simply the best feeling and old school sounding bass strings. I have Roto Flats on my 5 and Chromes oon my fretless. My 6 has TI Flats. Guess which im in love with. TI Flats. I am Upright trained and none feel better to me. Well worth the money. Cheaper than my Evah Pirazzis on my upright. So im cool with the price.
By Fernand
Unquestionably superior
March 30, 2010
These are the most versatile and richest sounding strings all around, they are excellent on just about every bass. They have a specific very thick timbre, and after a week or so settle into a stable plateau they stay at for years. Cost-effective as very long-lived unless you hate them. Who hates them? People who don't like subtle things or low tension, lumberjacks, wrestlers. They have a sort of life of their own living snake feel, far from the undersea cable feel of generic fat bass strings.
By Fernand
March 25, 2010
OK, I guess the world has woken up to TI flatwound bass strings. They ARE killer and they last a VERY LONG time. So the real question is are they worth the steep price? That's debatable. The timbre is unique and either you love it or you don't. I do. It's very rich and does resemble the stand-up bass. The feel is very smooth and I like that too. One key thing is that the tension is low. This gives you a lot of benefits in expressive playing. Works well with fingers, totally different with a pick.

I took them off a 5 string SX and a vintage Precision because it tended to make all instruments sound alike. The 5 string now has Rotosound steel roundwounds and the Precision has Dunlop nickel roundwounds. I now have the TIs on 2 basses: a fretless SX short scale and a Brice Violin Bass, also short scale. It is little tricky fitting the standard length strings on a short scale bass but in case anyone is wondering, it CAN be done. These strings rule on fretless. Although they don't growl enough if you really want that biting roundwound mwah, if the setup is correct, low enough, you get a good approximation with a lot of other timbres available. On a fretted bass you get a highly versatile and unique tone. On my long scale 6 string fretless I'm keeping my Chromes for now as they have a different timbre, but I'm looking forward to the day the Chromes need replacing and I can put the TIs on. Yes TI Flats last a very very long time, it's too bad the initial brightness fades so fast.
By Moe M.
TI flats
January 2, 2010
Great strings! The tone makes them worth the money. Just Strings service was awesome! I've already ordered more strings.
By Adam F.
Thomastic Infeld Flat wounds
December 25, 2009
These are the best strings on the market, period, and only sound better as they age. They have consistent tone, consistent, very comfortable tension, and last FOREVER.

Look no further.






1st C

Nickel Flat Wound Roundcore



2nd G

Nickel Flat Wound Roundcore



3rd D

Nickel Flat Wound Roundcore



4th A

Nickel Flat Wound Roundcore



5th E

Nickel Flat Wound Roundcore



6th B

Nickel Flat Wound Roundcore




Jazz Electric Bass

characteristics: smooth, warm balanced

"E-Bass Jazz Series are strings with extended durability and high output. A highly flexible steel core gives the string a balanced feeling and a special character. The overall sound characteristics can be described as very close to the double bass.



Founded in 1919, one of the world's largest manufacturers of strings for musical instruments has applied 76 years of experience to develop a new generation of strings.


Vienna, music capital of the world


Our strings are handmade by highly qualified specialists. With our extensive quality control via computer and signal processing equipment, we have successfully combined Old World craftsmanship with state of the art technology.


The results of our research and our scientific approach to string manufacturing -- based on cooperation with musicians and scientists -- have led to the creation of a new line of guitar strings that is exactly what professionals are calling for.


Guitar strings for creative musicians.

THOMASTIC-INFELD is the best kept secret in the music industry. Did you know that for decades most of the great jazz and classical guitar players have chosen THOMASTIK-INFELD strings? Old World quality and experience, combined with the most advanced modern technology available, give you creative tools to meet the highest standards of performance. Perhaps the time has come for you to discover what a chosen few have know for years? THOMASTIK-INFELD cares about the needs of professionals and amateurs. Worldwide."


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