DLS ULTIMATE IRIDIUM 12

12" · 8 Ω · 600 W · 88.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	33.8 Hz
Qts	0.386
Qes	0.43
Qms	3.77
Vas	49.2 L
Sd	491 cm²
Xmax	7 mm
Re	7.3 Ω
Bl	23.4 T·m
Mms	152.5 g
Pe	600 W
Sensitivity	88.8 dB

Alignment hint

EBP	79 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 20.9 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
Audiobahn AW120T	32.4 -1.4	0.39 =	45 -4.2	9 +2	87.5 -1.3	close	4 Ω vs 8 Ω: amp load changes	+
B&C 12 FG 100	34 +0.2	0.362 -0.02	49 -0.2	9.5 +2.5	91 +2.2	close		+
B&C 12FG100	34 +0.2	0.36 -0.03	49 -0.2	10.3 +3.3	91 +2.2	close		+
Pioneer TS-W126C(PREMIER)	32.6 -1.2	0.42 +0.03	55.614 +6.41	8.7 +1.7	88.4 -0.4	close	4 Ω vs 8 Ω: amp load changes · 400 W vs 600 W: lower power handling	+
Hifonics ZX1284	33 -0.8	0.38 -0.01	63 +13.8	9 +2	89.2 +0.4	close	4 Ω vs 8 Ω: amp load changes	+
Ground Zero GZRW 12XS-AL	30 -3.8	0.395 +0.01	52 +2.8	8.9 +1.9	90.4 +1.6	close	4 Ω vs 8 Ω: amp load changes	+
Sony XS-GTR121L	35 +1.2	0.46 +0.07	50 +0.8	8.4 +1.4	88.3 -0.5	close	4 Ω vs 8 Ω: amp load changes · 400 W vs 600 W: lower power handling	+
Ground Zero GZRW 30SPL vp	33.3 -0.5	0.357 -0.03	52 +2.8	9.1 +2.1	92 +3.2	close		+
Max Speaker MF300/77S4	26.4 -7.4	0.383 =	53.1 +3.9	6.7 -0.3	89 +0.2	close	4 Ω vs 8 Ω: amp load changes · 300 W vs 600 W: lower power handling · Xmax 6.7 mm < 7 mm: lower excursion-limited SPL	+
Pioneer TS-W306DVC	32.9 -0.9	0.478 +0.09	51.8 +2.6	8.3 +1.3	88.9 +0.1	close	400 W vs 600 W: lower power handling	+

Compare the closest 3 against the ULTIMATE IRIDIUM 12 →

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.