D'Addario · XS Phosphor Bronze (coated) · 12-16-24-32-42-53

D'Addario XSAPB1253 (12-16-24-32-42-53) in Drop D on a 24.75" scale

12-53 Light, XS Phosphor Bronze Coated Acoustic Guitar Strings on an acoustic guitar with a 24.75" scale, tuned to Drop D (E4 B3 G3 D3 A2 D2), pulls 146.5 lb66.4 kg652 N in total and 24.4 lb11.07 kg109 N per string on average. That is a loose feel for an acoustic guitar. The set is moderately uneven (spread 7.9%). String 6 (D2) deviates most: −24% from the set average.

Total tension: 146.5 lb66.4 kg652 N
Average per string: 24.4 lb11.07 kg109 N
Feel: loose; medium ≈ 26.8 lb12.14 kg119 N per string; Set your own preferred feel
Balance: moderately uneven; spread 7.9%

Tension per string

The bronze dashed line is the medium-feel target: the average per-string tension of a 12-53 set on a 25.5" scale in E standard (26.8 lb12.14 kg119 N). Loose and tight are measured against it.Line thickness follows the string gauge; textured lines are wound strings. Hover, tap or tab to a string for details.

#	Note	Hz	Gauge	Item	Type	Tension	vs avg
1	E4	329.6	.012	XSPL012	plain	22.1 lb10.01 kg98 N	−10%
2	B3	246.9	.016	XSPL016	plain	22.0 lb9.96 kg98 N	−10%
3	G3	196.0	.024	XSPB024	wound	28.4 lb12.87 kg126 N	+16%
4	D3	146.8	.032	XSPB032	wound	28.2 lb12.79 kg125 N	+15%
5	A2	110.0	.042	XSPB042	wound	27.2 lb12.36 kg121 N	+12%
6	D2	73.4	.053	XSPB053	wound	18.6 lb8.45 kg83 N	−24%
Total						146.5 lb66.4 kg652 N

Open in the calculator

Similar sets in Drop D, 24.75"

Set	Gauges	Avg per string	Total	Feel	Balance
D'Addario XSABR1253	12-16-24-32-42-53	23.9 lb10.84 kg106 N	143.4 lb65.0 kg638 N	loose	moderately uneven
Elixir 11050	12-16-24-32-42-53	24.1 lb10.93 kg107 N	144.5 lb65.6 kg643 N	loose	moderately uneven
Elixir 11052	12-16-24-32-42-53	24.1 lb10.93 kg107 N	144.5 lb65.6 kg643 N	loose	moderately uneven
XSAPB1253 (this page)	12-16-24-32-42-53	24.4 lb11.07 kg109 N	146.5 lb66.4 kg652 N	loose	moderately uneven
D'Addario EJ16	12-16-24-32-42-53	24.4 lb11.07 kg109 N	146.5 lb66.4 kg652 N	loose	moderately uneven
Elixir 16052	12-16-24-32-42-53	24.8 lb11.23 kg110 N	148.6 lb67.4 kg661 N	loose	moderately uneven

Best match for a medium feel in Drop D, 24.75"

Ranked by how close every string is to 26.8 lb12.14 kg119 N (lower deviation is better).

Elixir 11100 13-17-26-35-45-56 deviation 9.8%, average 27.9 lb12.66 kg124 N, moderately uneven; same gauges: 11102, 16102
Elixir 11075 12-16-24-35-45-56 deviation 9.8%, average 26.0 lb11.81 kg116 N, moderately uneven; same gauges: 11077, 16077
Elixir 16052 12-16-24-32-42-53 deviation 10.2%, average 24.8 lb11.23 kg110 N, moderately uneven; same gauges: 11050, 11052

More for the XSAPB1253

Other tunings on 24.75": E standard, Eb standard, D standard, Open G, Open D, DADGAD

Drop D on other scales: 25", 25.5"

About these numbers

Tension is calculated, not measured: T = μ · (2 · L · f)², where μ is the string's mass per unit length (unit weight), L the vibrating length (scale) and f the pitch (A4 = 440 Hz, equal temperament). kg means kilogram-force: 1 kg ≈ 9.81 N ≈ 2.205 lb.

How a set feels also depends on the guitar's setup: action height, break angle over the nut and saddle, string length behind the nut and bridge, and your playing style. Plain strings feel stiffer than wound strings at the same tension. Use these figures to compare sets, not as an absolute measure of feel.

Sources

D'Addario product page, tension chart for XSAPB1253 (2026-10-31): unit weights derived from the published tensions, cross-checked across sets.