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Realistic 40-1025

12" · 8 Ω · 200 W · 93.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size12"
Impedance8 Ω
Fs21.5 Hz
Qts0.452
Qes0.58
Qms2.04
Vas526 L
Sd530.7 cm²
Xmax11.4 mm
Re5.3 Ω
Bl7.1 T·m
Mms41.1 g
Pe200 W
Sensitivity93.3 dB

Alignment hint

EBP37 · sealed
Sealed Vb (Qtc ≈ 0.71)≈ 363.4 L

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

DriverFs (Hz)QtsVas (L)Xmax (mm)Sens (dB)FitNotesCompare
Davis 31ST12M v200922 +0.50.39 -0.06398 -1289 -2.491.8 -1.5usable100 W vs 200 W: lower power handling · Xmax 9 mm < 11.4 mm: lower excursion-limited SPL+
SB Acoustics SB34NRX75-6 vp22.2 +0.70.444 -0.01240 -28611 -0.492 -1.3usableXmax 11 mm < 11.4 mm: lower excursion-limited SPL+
Audax LFH50720 -1.50.483 +0.03513.5 -12.54.5 -6.992 -1.3usable100 W vs 200 W: lower power handling · Xmax 4.5 mm < 11.4 mm: lower excursion-limited SPL+
Audax PR300 MO AP25 +3.50.468 +0.02457 -694.4 -794 +0.7usable100 W vs 200 W: lower power handling · Xmax 4.4 mm < 11.4 mm: lower excursion-limited SPL+
Audiotechnology FLEXUNIT 12D775210KAP Custom19 -2.50.388 -0.06340 -1868.6 -2.891.1 -2.2usableXmax 8.6 mm < 11.4 mm: lower excursion-limited SPL+
Audiotechnology FLEXUNIT 12B775210KAP Custom19 -2.50.382 -0.07340 -1868.6 -2.891.2 -2.1usableXmax 8.6 mm < 11.4 mm: lower excursion-limited SPL+
SB Acoustics SB34NRX75-619 -2.50.397 -0.05260 -26611 -0.491 -2.3usableXmax 11 mm < 11.4 mm: lower excursion-limited SPL+
Visaton WS30022 +0.50.321 -0.13340 -1868 -3.492.5 -0.8usable150 W vs 200 W: lower power handling · Xmax 8 mm < 11.4 mm: lower excursion-limited SPL+
Wharfedale 301420.7 -0.80.342 -0.11319.1 -206.98 -3.492.2 -1.1usable100 W vs 200 W: lower power handling · Xmax 8 mm < 11.4 mm: lower excursion-limited SPL+
Davis 31ST12M24 +2.50.399 -0.05260 -2668.9 -2.591.6 -1.7usable100 W vs 200 W: lower power handling · Xmax 8.9 mm < 11.4 mm: lower excursion-limited SPL+

Compare the closest 3 against the 40-1025 →

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.