null
Thomastik

Peter Infeld Upright Bass Strings

(1 review) Write a Review

We ship worldwide! (Read this)

FREE SHIPPING:
To all 50 US States
PRODUCT OPTIONS:
Multiple Sets & Single Strings Available
Sets & Singles Available
  • Peter Infeld Upright Bass Strings - box
  • Peter Infeld Upright Bass Strings - info panel
  • Peter Infeld Upright Bass Strings - stack of strings out of package
  • Peter Infeld Upright Bass Strings - four strings no package
  • Peter Infeld Upright Bass Strings - tailpiece silks
Our Low Price: $419.95

Price shown may change based on options selected below (if applicable)

Frequently bought together:

Description

Includes our exclusive Gollihur Music tipsheet to get the most out of your purchaseThomastik worked on these strings feverishly for well over a year, and now they have finally brought them to you! Officially launched at the ISB conference in Tallahassee in 2025, these new strings promise to bring a whole different vibe to the Thomastik lineup of strings. They were reportedly a big hit at the convention, and we are looking forward to getting acquainted with them very soon.

In the meantime, here's what Thomastik is saying about them:

The strings’ tonal core is centered and well-balanced and their sound is powerful in the mid frequencies. They offer a substantial amount of sound colors, but leave you as a player in control at all times.

But here’s what makes our PETER INFELD ® strings particularly popular with so many players and their audiences: We developed them to produce a special bow noise that contributes to a remarkable projection, which makes your sound shine all the way to the farthest corner of the room.

From what I've read, they use a similar core to the one in the venerable Spirocores - but provide a bit more damping to get a warmer, less mid-rangey response for both arco and pizz. Some players who tried the prototypes are saying that they're more suited for arco, others find them to be great for jazz. Many are saying that they fall, tonally, between the Spiros and Belcantos.

We'll have more information when we've had a chance to put them through their paces.

Tension and Gauge:

   Gauge  Tension
G string .053 28.8kg/63.5 lbs
D string .062 29.3kg/64.6 lbs
A string .079 29.3kg/64.6 lbs
E string .104 30.5kg/67.2lbs
Extended E/C string .111 32.8kg/72.3lbs

Usable on basses from 103cm (40.6") to 110 cm (43.3")

View AllClose

1 Review

  • 3

    Thomastik Peter Infeld

    Posted by mc on Sep 6th 2025

    I expect the PI's to settle down as they break in, but because there is so little information out there at the moment, here are some early reactions to the PI on my Hachez: They feel like an admirable attempt at a Bel Canto to Spiro set, but unfortunately are remarkably unbalanced on my bass. (Perhaps fortunately, considering the price) The G is very muted. It feels like a tighter Bel Canto and similarly has very little sustain. It is very sweet sounding under the bow and is ready to go without break-in. The D is my favorite of the set. It's a little brighter than the G (with just a hint of growl) and has more sustain. It's tighter than a Bel Canto D, but feels looser under the hand than the PI G. For my taste, this is the perfect in-between of BC and Spiro. It is similarly ready to go without break-in, but this one actually feels like a new string, where the G sounds like I've already spent a year on it. The G and D pair decently under the bow, but when going from the D to the G, the G consistently feels muted and dark. The G also sustains noticeably less than the D. It's been a minute since I've played a Spirocore A string, but the PI A on my bass sounds like a straight Spirocore. It seems completely unmuted and is *very* wiry; tons of sustain, tons of harmonics. It has a nice reedy top-end and bows decently. It has the least tension of the set. Honestly, I think it will sound quite good once it settles in, it just doesn't really match any of the other strings in tone or tension. The E (extended C) is odd to me. I don't like it at all on my bass. It is very muted and dull, like an extra fat, extra tight, old Bel Canto. It's possible this could match well with the G, but it's tough to tell with the A and D in between. The A D G -- despite not really matching tonally -- they at least feel like there was a plan (Bels to Spiros). But the E is grunty and significantly muted for me. The pizz is similarly inconsistent: the G is thumpy and has an extremely short sustain; the D has just a touch of that new-steel-string quality and sustains as I am used to; the A has wild sustain and is really pretty gnarly initially; and the E has some sustain but is dark and doesn't seem to give back what I put in. I do like that they can take more of a beating than BC's. The reedy quality is nice, but can get gravelly if I'm not careful with the rosin situation. They don't bow quite as easily as BC's, but still bow pretty decently. They're definitely loud, which is great. Perhaps some of the tonal considerations were necessary to keep a balance in volume. I just wish the E was brighter so that it at least fit the trajectory of the strings: dull up high to bright down low. To be fair, this is early and I assume they'll begin to blend better as they break-in. Despite my criticisms, I would have still given these 4 stars because the strings are well made and aren't redundant, but at this price the strings would have to be far better for me.

View AllClose