Polk Audio - Car & Marine Audio Speakers

Driver Properties
Name	MM2084 (4 ohm)
Diameter	8 in.
No. of Drivers	2
Fs	43
Qms	15.13
Vas	0.562 cu.ft./15.9 L
Xmax	.709 in. / 18 mm.
Sd	34.72 sq.in. / 224 sq. cm.
Qes	.68
Le	1.84 mH
Z	4 ohm
Pe	400



Box Properties
Type	Dual Bandpass
Shape	Rectangular
Comment	Use 3/4 inch MDF for box building material
Enclosure details	2.05 cu. ft. (58.05 liters)

Overall External Dimensions
Width	27-2/5" (69.60cm)
Height	13-1/2" (34.29cm)
Depth	15" (38.10cm)

Chamber 1

Vb = 0.40 cu.ft. (11.33 liters)
Fb = 84.10 Hz.
F3 = 41.89 Hz.
Fill = Minimal Polyfill

Chamber 2

Vb = 1.25 cu.ft. (35.40 liters)
Fb = 60.64 Hz.
F3 = 88.30 Hz.
Fill = Minimal Polyfill

No. of Vents = 2
Vent Shape = Round
DV = 4.00 in. (10.16cm)
LV = 10.00 in. (25.40cm)

Chamber 3

Vb = 0.40 cu.ft. (11.33 liters)
Fb = 84.10 Hz.
F3 = 41.89 Hz.
Fill = Minimal Polyfill

Detail Enclosure Images

Finished front view.

In side view with one chamber pre-loaded.

Driver orientation. Same for chamber one and chamber three.

Actual Measured Performance

Anechoic chamber response

In car response

*** As measured with a in-house car with 1 Volt input. Actual results may vary with different vehicles.