Polk Audio - Car & Marine Audio Speakers

Driver Properties
Name	MM2104 (4 ohm)
Diameter	10 in.
No. of Drivers	2
Fs	35
Qms	13.77
Vas	1.083 cu.ft. / 30.67 L
Xmax	.35 in. / 9 mm
Sd	57.72 sq.in. / 353 sq.cm.
Qes	.5
Le	2.56 mH
Z	4 ohm
Pe	600



Box Properties
Type	Dual Bandpass
Shape	Rectangular
Comment	Use 3/4 inch MDF for box building material
Enclosure details	3.25 cu. ft. (91.97 liters)

Overall External Dimensions
Width	32-59/100" (82.78cm)
Height	15" (38.10cm)
Depth	17" (43.18cm)

Chamber 1

Vb = 0.87 cu.ft. (24.75 liters)
Fb = 64.02 Hz.
QL = 5
F3 = 45.64 Hz.
Fill = Minimal Polyfill

Chamber 2

Vb = 1.50 cu.ft. (42.48 liters)
Fb = 64.58 Hz.
QL = 7
F3 = 93.45 Hz.
Fill = Minimal Polyfill

No. of Vents = 3
Vent Shape = Round
DV = 4.00 in. (10.16cm)
LV = 11.00 in. (27.94cm)

Chamber 3

Vb = 0.87 cu.ft. (24.75 liters)
Fb = 64.02 Hz.
QL = 7
F3 = 45.64 Hz.
Fill = Minimal Polyfill

Detail Enclosure Images

Internal view showing driver orientation and port installation.

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.