---
product_id: 1363707
title: "Thomastik-Infeld Bass Guitar Strings - Flatwound Bass Strings For a Rich and Warm Traditional Jazz Sound - Durable String Set Includes JF34043 JF34056 JF34070 JF34100 - Made in Vienna"
brand: "thomastik-infeld"
price: "894 Lei"
currency: RON
in_stock: true
reviews_count: 13
category: "Thomastik Infeld"
url: https://www.desertcart.ro/products/1363707-thomastik-infeld-bass-guitar-strings-flatwound-bass-strings-for-rich
store_origin: RO
region: Romania
---

# Long-lasting durability & tuning stability Roundcore steel for warm, rich tone Nickel flatwound wrap for smooth play Thomastik-Infeld Bass Guitar Strings - Flatwound Bass Strings For a Rich and Warm Traditional Jazz Sound - Durable String Set Includes JF34043 JF34056 JF34070 JF34100 - Made in Vienna

**Brand:** thomastik-infeld
**Price:** 894 Lei
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your bass game with the ultimate jazz flatwounds — feel the vibe, own the groove!

## Quick Answers

- **What is this?** Thomastik-Infeld Bass Guitar Strings - Flatwound Bass Strings For a Rich and Warm Traditional Jazz Sound - Durable String Set Includes JF34043 JF34056 JF34070 JF34100 - Made in Vienna by thomastik-infeld
- **How much does it cost?** 894 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/1363707-thomastik-infeld-bass-guitar-strings-flatwound-bass-strings-for-rich)

## Best For

- thomastik-infeld enthusiasts

## Why This Product

- Trusted thomastik-infeld brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Pro-Approved Legacy:** Join the ranks of bass legends who trust Thomastik-Infeld for that unmistakable 'Rolls Royce' sound.
- • **Enduring Performance:** Crafted in Vienna for strings that maintain tone and feel gig after gig, session after session.
- • **Warm, Jazz-Ready Tone:** Capture the iconic upright bass warmth with a rich, balanced sound that commands any stage or studio.
- • **Silky Smooth Playability:** Experience effortless slides and zero finger noise with premium ribbon flatwound nickel strings.
- • **Flexible Roundcore Design:** Enjoy enhanced bendability and expressive vibrato without sacrificing tension consistency.

## Overview

Thomastik-Infeld Bass Guitar Strings JF344 are premium nickel flatwound strings featuring a roundcore steel core for warm, rich jazz tones and smooth playability. Designed for durability and consistent tension, these strings deliver a classic upright bass feel with enhanced flexibility, making them ideal for professional bassists seeking a balanced, expressive sound. Made in Vienna, they are celebrated for their long-lasting performance and minimal finger noise.

## Description

Smooth, warm, and balanced. Jazz bass strings from Thomastik-Infeld offer you extended durability and high output. A highly flexible steel core gives these bass strings a balanced feeling and special character. The overall sound characteristics can be described as very close to the double bass. Nickel flatwound with a round core. 34" Scale. Gauges:.043 -.056 -.070 -.100.

Review: Fantastic thomastik - The tone is fantastic. They were the correct length for my Pbass and strung up easy. I played a few gigs and recording sessions with them. The tone has a kind of edge to it like round wounds but warm and very limited fret noise. The low tension is great because it allows you to play softer with a nice full tone or make it feel like you're digging in with less effort which improves perceived dynamics. They are breaking in slowly and nicely over months and stay in tune on my bass almost indefinitely so I am optimistic about durability. Over all, maybe a tiny hair brighter than traditional flats but very warm and round with a little edge and good dynamics.
Review: 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.

## Features

- The Thomastik-Infeld Experience: For decades, upright bassists have relied on Thomastik-Infeld’s iconic Spirocore strings for their rich sound. Now, electric bassists can experience that same legendary tone with these jazz flatwound guitar strings.
- Smooth Playability: Crafted with a true ribbon flatwound nickel alloy wrap and a silk inlay, these strings provide a smooth surface that feels incredible under your fingers. Say goodbye to finger noise and enjoy effortless slides and transitions.
- Unmatched Clarity: A highly pliable steel core enhances the fundamental tone, delivering a rich, warm, and well-balanced sound. Whether you're laying down groovy basslines or driving a mix with punchy low-end, these strings ensure superior definition.
- Dynamic Playing Styles: Unlike traditional flatwounds, the roundcore design of these strings offers enhanced flexibility, making bends, vibrato, and expressive playing natural. Enjoy consistent tension across all four strings for a balanced feel.
- Stands the Test of Time: Built with expert craftsmanship, this bass string set maintains their tone, feel, and playability. Whether you're performing on stage or recording in the studio, trust Thomastik-Infeld for long-lasting, reliable performance.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00162ZSW6 |
| Best Sellers Rank | #8,680 in Musical Instruments ( See Top 100 in Musical Instruments ) #50 in Bass Guitar Strings |
| Body Material Type | Nickel |
| Brand | Thomastik-Infeld |
| Brand Name | Thomastik-Infeld |
| Coating Description | coated |
| Color | Natural |
| Customer Reviews | 4.8 out of 5 stars 654 Reviews |
| Finish Type | Nickel Plated |
| Global Trade Identification Number | 09003918701596 |
| Included Components | 4 strings |
| Instrument | Bass Guitar |
| Item Type Name | Accordion Accessory |
| Item Weight | 4 ounces |
| Manufacturer | Thomastik-Infeld |
| Manufacturer Part Number | 682715 |
| Material Type | Nickel |
| Model Name | JF344 |
| Model Number | JF344 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Recommended Uses For Product | Bass Guitar |
| Sound Profile | Warm and Balanced |
| String Gauge | Medium |
| String Material Type | Nickel Steel |
| Unit Count | 1 Count |
| Warranty Description | Manufacturer's warranty. |

## Product Details

- **Brand:** Thomastik-Infeld
- **Color:** Natural
- **Instrument:** Bass Guitar
- **String Gauge:** Medium
- **String Material Type:** Nickel Steel

## Images

![Thomastik-Infeld Bass Guitar Strings - Flatwound Bass Strings For a Rich and Warm Traditional Jazz Sound - Durable String Set Includes JF34043 JF34056 JF34070 JF34100 - Made in Vienna - Image 1](https://m.media-amazon.com/images/I/81pRfuHWO2L.jpg)
![Thomastik-Infeld Bass Guitar Strings - Flatwound Bass Strings For a Rich and Warm Traditional Jazz Sound - Durable String Set Includes JF34043 JF34056 JF34070 JF34100 - Made in Vienna - Image 2](https://m.media-amazon.com/images/I/61oz69CsSgL.jpg)
![Thomastik-Infeld Bass Guitar Strings - Flatwound Bass Strings For a Rich and Warm Traditional Jazz Sound - Durable String Set Includes JF34043 JF34056 JF34070 JF34100 - Made in Vienna - Image 3](https://m.media-amazon.com/images/I/81xieaAeEyL.jpg)
![Thomastik-Infeld Bass Guitar Strings - Flatwound Bass Strings For a Rich and Warm Traditional Jazz Sound - Durable String Set Includes JF34043 JF34056 JF34070 JF34100 - Made in Vienna - Image 4](https://m.media-amazon.com/images/I/31uOL4VpTFL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fantastic thomastik
*by R***N on February 5, 2026*

The tone is fantastic. They were the correct length for my Pbass and strung up easy. I played a few gigs and recording sessions with them. The tone has a kind of edge to it like round wounds but warm and very limited fret noise. The low tension is great because it allows you to play softer with a nice full tone or make it feel like you're digging in with less effort which improves perceived dynamics. They are breaking in slowly and nicely over months and stay in tune on my bass almost indefinitely so I am optimistic about durability. Over all, maybe a tiny hair brighter than traditional flats but very warm and round with a little edge and good dynamics.

### ⭐⭐⭐⭐⭐ The “Rolls Royce” of Bass Strings — Carol Kaye Was Right
*by J***. on November 23, 2025*

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.

### ⭐⭐⭐⭐⭐ Tomastik Jazz Bass Flatwound Strings
*by L***D on January 6, 2012*

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.

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-08-18*