Polk Audio - Car & Marine Audio Speakers

Driver Properties
Name	MOMO120 (4 ohm)
Diameter	12 in.
No. of Drivers	1
Fs	30
Qms	8.06
Vas	2.15cu ft. / 61L
Xmax	.3343 in / 8.7 mm
Sd	.553 sq ft / .0514 sq m
Qes	0.50
Le	1.3 mH
Z	4 ohm
Pe	1000



Box Properties
Type	Single Bandpass
Shape	Prism, Bandpass with two chambers
Enclosure details	2.10 cu. ft. (59.47 liters)

Overall External Dimensions
Width	21-1/4" (53.98cm)
Height	15" (38.10cm)
Depth	17" (43.18cm)

Chamber 1
- lower - freq.
Vb = 0.90 cu.ft. (25.49 liters)
Fb = 55.26 Hz.
QL = 7
F3 = 40.31 Hz.
Fill = minimal

Chamber 2
- upper - freq.
Vb = 1.20 cu.ft. (33.98 liters)
Fb = 57.50 Hz.
QL = 7
F3 = 82.36 Hz.
Fill = minimal

No. of Vents = 2
Vent Shape = round
Vent ends = one flush
DV = 4.00 in. (10.16cm)
LV = 13.00 in. (33.02cm)

Actual Measured Performance

A view of chamber 1 before the enclosure is sealed

Out of Car Response

Cone Displacement

In Car Response

System Impedence

Vent Air Velocity

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