Elemental Designs e8A

8″ subwoofer · 300 W RMS

33.3 HzFs, resonance

0.44Qts

0.38 ft³Vas

0.65″Xmax

300 WRMS

Source	web.archive.org · manufacturer data
Checked against source	October 2026
Thiele/Small parameters	not in the spec sheet: Sd — typical value for the size used
Mounting dimensions	0 of 4 — missing: cutout, mounting depth, frame outer diameter, magnet diameter; the designer will use an estimate

Recommended box

For a sedan, one sub, 300 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

smaller, tighter

0.32 ft³ (9 L)

Net volume

Bass character (Qtc)	Flat and accurate · 0.65
Fc	50 Hz
F3 (−3 dB, no cabin gain)	57 Hz
Example box (outside)	10 5/8″ × 10 5/8″ × 8 5/8″

Open sealed box in designer

Ported

deeper, louder

0.53 ft³ (15 L)

Net volume

Tuning (Fb)	45 Hz
Port	round port Ø2 1/2″, 10 9/16″ long
Port velocity at 300 W	163 ft/s
F3 (−3 dB, no cabin gain)	39 Hz
Example box (outside)	15 5/8″ × 15 3/4″ × 6 1/2″

At 300 W this example’s port will be noisy: air speed 163 ft/s, while the limit is 82 ft/s. It stays quiet up to about 75 W. Full power needs a port of at least 9.9 in², which means a bigger box than this example — size it in the designer.

Open ported box in designer

Deeper: 0.64 ft³ (18 L) tuned to 35 Hz, 19 1/8″ × 15 3/4″ × 6 1/2″ outside — a bigger box with flatter deep bass. Open in the calculator

Where to buy Amazon

Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Size	8″
Voice coils	—
RMS power	300 W
Fs	33.3 Hz
Qts	0.44
Qes	0.49
Qms	3.89

Vas	0.38 ft³
Re	3.2 Ω
Sd	≈ 33.3 in²
Xmax	0.65″
EBP	68 — sealed or ported calc.
Sensitivity, 1 W / 1 m	81.1 dB calc.

Mounting dimensions

Cutout diameter	≈ 7 5/16″
Mounting depth	≈ 3 15/16″

“≈” 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

web.archive.org/web/20030218093906/http://www.edesignaudio.com/ep/ats.htm

Other Elemental Designs 8″ models

Elemental Designs 9Kv.2 8″ · DVC
Elemental Designs e3.8 8″ · DVC

Similar 8″ subwoofers from other brands

Close in Fs, Qts and Vas — a box of similar volume will suit them.

Hifonics ZXS8D2 0.28 ft³ sealed · 0.49 ft³ ported
Audiobahn AW800X 0.32 ft³ sealed · 0.99 ft³ ported
Infinity Kappa 800W 0.32 ft³ sealed · 0.53 ft³ ported
DD Audio SL608 D2 0.32 ft³ sealed · 0.71 ft³ ported
DD Audio SL608 D4 0.32 ft³ sealed · 0.71 ft³ ported
Rockford Fosgate Punch HE2 RFP4208 0.28 ft³ sealed · 0.92 ft³ ported

FAQ

What box does the Elemental Designs e8A need?

Recommended net volume: 0.32 ft³ sealed, 0.53 ft³ ported tuned to 45 Hz — for one sub in a sedan at 300 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.

What are the Elemental Designs e8A Thiele/Small specs?

Fs 33.3 Hz, Qts 0.44, Vas 0.38 ft³, Xmax 0.65″.

How much power does the Elemental Designs e8A handle and how do I wire it?

RMS power rating: 300 W. Wiring for several subs and amp power — in the wiring calculator.