Pioneer TS-SW251

10" · 4 Ω · 200 W · 79.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	10"
Impedance	4 Ω
Fs	41.3 Hz
Qts	1.09
Qes	1.15
Qms	9.9
Vas	9.75 L
Sd	309 cm²
Xmax	6.6 mm
Re	3 Ω
Bl	11.8 T·m
Mms	206.6 g
Pe	200 W
Sensitivity	79.6 dB

Alignment hint

EBP	36 · sealed
Sealed Vb (Qtc ≈ 0.71)	Qts too high

EBP < 50: favours a sealed (closed) alignment.

Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.

Substitute candidates

Driver	Fs (Hz)	Qts	Vas (L)	Xmax (mm)	Sens (dB)	Fit	Notes	Compare
Pioneer TS-SW2541D	43.5 +2.2	0.95 -0.14	8.25 -1.5	6 -0.6	80 +0.4	usable	Xmax 6 mm < 6.6 mm: lower excursion-limited SPL	+
Pioneer TS-SW2502S4	42 +0.7	0.97 -0.12	18.5 +8.75	6.5 -0.1	83 +3.4	usable	Xmax 6.5 mm < 6.6 mm: lower excursion-limited SPL	+
Pioneer TS-SW2501S4	41.6 +0.3	0.93 -0.16	10.3 +0.55	3.6 -3	84.9 +5.3	usable	Xmax 3.6 mm < 6.6 mm: lower excursion-limited SPL	+
JL Audio 10TW1-2	41.45 +0.15	0.65 -0.44	10.31 +0.56	10.31 +3.71	82.5 +2.9	usable	2 Ω vs 4 Ω: amp load changes	+
Kenwood KFC-W2511	60 +18.7	0.84 -0.25	9.38 -0.37	7 +0.4	85.2 +5.6	usable		+
Pioneer TS-W2501D4	38.8 -2.5	0.721 -0.37	6.3 -3.45	6 -0.6	82.7 +3.1	usable	Xmax 6 mm < 6.6 mm: lower excursion-limited SPL	+
Xtant X2 1044	37.2 -4.1	0.961 -0.13	15.9 +6.15	5.7 -0.9	88.5 +8.9	risky	2 Ω vs 4 Ω: amp load changes · Xmax 5.7 mm < 6.6 mm: lower excursion-limited SPL	+
Pioneer TS-W261D4	46 +4.7	1.044 -0.05	17.7 +7.95	8.4 +1.8	89.9 +10.3	risky		+
JL Audio 10TW1-4	38 -3.3	0.6 -0.49	12.15 +2.4	10 +3.4	82.2 +2.6	risky		+
Skar Audio EV-10 S4	50.9 +9.6	0.76 -0.33	14 +4.25	8.5 +1.9	85.2 +5.6	risky	150 W vs 200 W: lower power handling	+

Compare the closest 3 against the TS-SW251 →

Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.

Used in enclosures (0)

No enclosure in the catalog uses this driver yet.