Nakamichi SP-W30S

12" · 4 Ω · 200 W · 91.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	27.8 Hz
Qts	0.464
Qes	0.541
Qms	3.26
Vas	92.3 L
Sd	547.4 cm²
Xmax	6.6 mm
Re	3.4 Ω
Bl	12.8 T·m
Mms	149.6 g
Pe	200 W
Sensitivity	91.3 dB

Alignment hint

EBP	51 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 69.8 L

EBP 50-100: works in either a sealed or ported 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
Morel PRIMO 12	28 +0.2	0.474 +0.01	85 -7.3	8 +1.4	91.5 +0.2	close		+
Tymphany LAT 500-04	28 +0.2	0.474 +0.01	81 -11.3	7.7 +1.1	91.6 +0.3	close		+
Clarion WG3020	28 +0.2	0.43 -0.03	93.4 +1.1	6 -0.6	91.9 +0.6	close	Xmax 6 mm < 6.6 mm: lower excursion-limited SPL	+
Rythmik Audio DS1200	26 -1.8	0.444 -0.02	88 -4.3	8.8 +2.2	91.7 +0.4	close		+
Infinity 1230W	27.3 -0.5	0.437 -0.03	78.5 -13.8	7.9 +1.3	91 -0.3	close		+
Triangle T36SV110C	30.7 +2.9	0.457 -0.01	91.3 -1	6 -0.6	89.6 -1.7	close	8 Ω vs 4 Ω: amp load changes · Xmax 6 mm < 6.6 mm: lower excursion-limited SPL	+
JBL GTO 1264	26.7 -1.1	0.428 -0.04	83.1 -9.2	6.3 -0.3	91 -0.3	close	Xmax 6.3 mm < 6.6 mm: lower excursion-limited SPL	+
Focal 33S	25.9 -1.9	0.464 =	107.9 +15.6	7.5 +0.9	92.8 +1.5	close		+
JBL CS1204	24.8 -3	0.429 -0.04	91.1 -1.2	6.3 -0.3	90.3 -1	close	Xmax 6.3 mm < 6.6 mm: lower excursion-limited SPL	+
JBL GT 120	24.8 -3	0.429 -0.04	91.1 -1.2	8.1 +1.5	90.3 -1	close		+

Compare the closest 3 against the SP-W30S →

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.