Altec 515C

15" · 16 Ω · 75 W · 97.2 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	16 Ω
Fs	24.7 Hz
Qts	0.166
Qes	0.17
Qms	7.5
Vas	557.8 L
Sd	824.4 cm²
Xmax	4.2 mm
Re	12 Ω
Bl	27.9 T·m
Mms	70.9 g
Pe	75 W
Sensitivity	97.2 dB

Alignment hint

EBP	145 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 32.5 L

EBP > 100: favours a ported (bass-reflex) 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
Altec 515B	24.7 =	0.166 =	557.8 =	4.2 =	97.2 =	close		+
Electro-Voice DL 15W	21 -3.7	0.164 =	575 +17.2	5.6 +1.4	98.2 +1	close	8 Ω vs 16 Ω: amp load changes	+
Tannoy K3838	22 -2.7	0.176 +0.01	481.4 -76.4	4 -0.2	97.9 +0.7	close	8 Ω vs 16 Ω: amp load changes · Xmax 4 mm < 4.2 mm: lower excursion-limited SPL	+
Gauss 3580 GAUSS	25 +0.3	0.16 -0.01	438.9 -118.9	5.1 +0.9	99.2 +2	close	8 Ω vs 16 Ω: amp load changes	+
Beyma 15B42	24.2 -0.5	0.185 +0.02	480.9 -76.9	4 -0.2	98.8 +1.6	close	8 Ω vs 16 Ω: amp load changes · Xmax 4 mm < 4.2 mm: lower excursion-limited SPL	+
Audax PR38S100	24 -0.7	0.171 +0.01	423 -134.8	4 -0.2	98.7 +1.5	close	8 Ω vs 16 Ω: amp load changes · Xmax 4 mm < 4.2 mm: lower excursion-limited SPL	+
Altec 515E	22.9 -1.8	0.185 +0.02	665.5 +107.7	4.6 +0.4	96.5 -0.7	close		+
Fluxmag 1504-BM	22.7 -2	0.183 +0.02	469.9 -87.9	5 +0.8	98 +0.8	close	8 Ω vs 16 Ω: amp load changes	+
Tannoy DU 386	22 -2.7	0.185 +0.02	483 -74.8	4 -0.2	97.6 +0.4	close	8 Ω vs 16 Ω: amp load changes · Xmax 4 mm < 4.2 mm: lower excursion-limited SPL	+
Tannoy HPD 385A	22 -2.7	0.185 +0.02	483 -74.8	4 -0.2	97.6 +0.4	close	8 Ω vs 16 Ω: amp load changes · Xmax 4 mm < 4.2 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 515C →

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.