The Sound That Will Move You
Earthquake Sound Corporation
2727 McCone Avenue. Hayward, CA 94545.USA
US Toll Free: 1-800-576-7944 | Tel: 510-732-1000 | Fax: 510-732-1095
www.earthquakesound.com
PUMP-12
12-INCH PASSIVE MODULE
Earthquake Sound is proud to present to you the PUMP-12 passive
radiator module. Essentially two horn loaded 12-inch passive
radiators, the PUMP-12 has many different applications and uses.
When using a sealed enclosure, there is one peak of resonant
frequency at which the amplifier draws the least current. The graphs
below illustrate the difference between a typical sealed box enclosure
and the PUMPed box enclosure.
10 HZ 50 100 1KHZ
AMPLIFIER CURRENT IN AMPERE
6
2
1
4
PUMPED ENCLOSURE
DOWN CURRENT
10 HZ 50 100 1KHZ
AMPLIFIER CURRENT IN AMPERE
6
2
1
4
SEALED BOX
AMPLIFIER CURRENT
10 HZ 50 100 1KHZ
IMPEDANCE IN OHM
16
32
8
PUMPED BOX
IMPEDANCE
SEALED BOX
IMPEDANCE
Specifications are subject to change without notice.
As you can see, the green area is 30% less than the yellow area. This
means the down current of the PUMPed enclosure is 30% less than
that of the regular sealed box enclosure. With less down current, the
speaker’s impedance increases and therefore, SPL also increases.In
summary, the PUMP-12 increases the subwoofer’s SPL by 6dB
without the need to draw more amplifier current.
The P UM P-12 works great with the following subwoofer
combinations:
One 10-inch subwoofer + one PUMP-12
One 12-inch subwoofer + one PUMP-12
One 15-inch subwoofer + one PUMP-12
Two 10-inch subwoofers + one PUMP-12
Two 12-inch subwoofers + one PUMP-12
When selecting which active driver(s) to use with the PUMP-12, it is
important to make sure that the combined piston area of the active
driver(s) does not exceed that of the PUMP-12 (226 sq.in.).
PUMP-12 Insert
SPECIFICATIONS
1
6 /
2
”
7
13 /
8
”
13
/
64
”
1
14 /
4
”
1
12 /
2
”
6”
Cutout Dimensions:
1 3
5 /
2
” x 12 /
4
” (140 mm x 324 mm)
Recommended Box Size:
The PUMP-12 requires 9-in x 14-in x 14-in of
installation space. Take the recommended sealed
enclosure dimensions of the chosen active driver and
add the 9-in x 14-in x 14-in to it.
We recommend sanding the cutout hole and pushing
the module’s dust caps inwards to allows the PUMP-12
to go through the cutout hole without damaging the
surrounds.
Specifications are subject to change without notice.
