Diamond H154

15″ subwoofer · dual 4 Ω · 750 W RMS

Fs 23 HzQts 0.50Vas 3.67 ft³Xmax 0.69″

Recommended box

For a sedan, one sub, 750 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.

Sealed

Net volume2.37 ft³ (67 L)
Qtc0.80
Fc37 Hz
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 10 3/8″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)25 Hz
Portslot 2 9/16 × 16 5/16″, 31 13/16″ long
Port velocity at 750 W62 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 22 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs23 Hz
Qts0.50
Qes0.6
Qms3
Vas3.67 ft³
Re (one coil)3 Ω
Sd124 in²
Xmax0.69″
Vd85.4 in³ calc.
Mms418 g calc.
BL17.4 T·m calc.
EBP38 — suits sealed calc.
Sensitivity, 1 W / 1 m85.2 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power750 W

Mounting dimensions

Ø15 1/2″cutout Ø13 7/8″mounting depth 7 7/8″magnet Ø≈ 9 1/16″
Cutout diameter13 7/8″
Mounting depth7 7/8″
Overall diameter15 1/2″

“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.

Data sources

Other Diamond 15″ models