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DTJS112

Thomastik JS112 Jazz Swing Series Flatwound Set 12/50


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The Thomastik-Infeld JS112 Jazz Swing is the premier medium-light flatwound string set engineered specifically for archtop, hollowbody, and semi-hollow jazz guitars. Handcrafted in Vienna, this .012–.050 gauge set pairs glassy-smooth, mirror-polished pure nickel flat ribbon windings on supple round steel cores with brass-plated plain treble strings to produce the ultimate dark, smoky, and authentic jazz tone.

Widely considered the quintessential gauge choice for carved archtop acoustic soundboards, the JS112 delivers optimal top-plate vibration and strong acoustic fundamentals without the stiff playing feel of conventional heavy gauge strings. Australian jazz guitarists and hollowbody players choose this set for its remarkably low-tension flexibility, zero finger squeak, reduced fret wear, and a wound G string that guarantees immaculate intonation across complex chord voices.

Features

  • Benchmark true flatwound 6-string set designed for archtop, hollowbody, semi-hollow, and solid-body jazz guitars
  • Supple round steel core delivers unmatched flexibility, reduced finger fatigue, and signature low-tension comfort
  • Glassy-smooth, polished pure nickel flat ribbon winding virtually eliminates finger squeak and fret wear
  • Produces deep, warm fundamentals with singing sustain and articulate harmonic overtones
  • Brass-plated plain steel treble strings provide smooth, velvety highs without harsh metallic overtones
  • Includes a wound G (3rd) string (.020) for authentic archtop intonation and balanced acoustic tension
  • Medium-light gauge configuration (.012 - .050) drives archtop tops effectively while preserving effortless left-hand playability

Specs

  • Model: JS112 (DTJS112)
  • Instrument: Electric Guitar / Archtop Jazz Guitar
  • Series: Jazz Swing Flat Wound
  • Set Type: 6-String Electric Guitar Set
  • Gauge Type: Medium Light (.012 - .050)
  • Number of Strings: 6
  • Core Material: Round Steel Core
  • Winding Material: Pure Nickel Flat Ribbon Wound
  • Plain Strings: Plain Steel, Brass Plated
  • Total Set Tension: 63.60 kg / 140.20 lb

String Specifications

  • E String (1st) – DTP12: Plain steel, brass plated, 0.012" (0.30 mm) gauge, 10.30 kg / 22.80 lb tension
  • B String (2nd) – DTP16: Plain steel, brass plated, 0.016" (0.40 mm) gauge, 10.30 kg / 22.70 lb tension
  • G String (3rd) – DTJS20: Round steel core, nickel flat wound ribbon, 0.020" (0.51 mm) gauge, 11.20 kg / 24.60 lb tension
  • D String (4th) – DTJS27: Round steel core, nickel flat wound ribbon, 0.027" (0.68 mm) gauge, 10.90 kg / 24.10 lb tension
  • A String (5th) – DTJS37: Round steel core, nickel flat wound ribbon, 0.037" (0.94 mm) gauge, 10.30 kg / 22.80 lb tension
  • E String (6th) – DTJS50: Round steel core, nickel flat wound ribbon, 0.050" (1.27 mm) gauge, 10.60 kg / 23.30 lb tension