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Granite-52 Design
• 5 1/4" woofer with polycone with butyl rubber surround
• ½" Mylar tweeter
Granite-52 is a pair of left and right speakers with an unconventional coaxial design. The tweeter is mounted
on the same shaft of the speaker and in a typical speaker, the shaft requires a small opening for movement.
This allows moisture to pass the waterproof cone and get into the voice coil, damaging the speaker.
Earthquake engineers solved this problem by developing the world's first rubber spider. This injection molded
rubber is shaped like a spider which is waterproof and extremely durable under weather conditions. The
spider acts as a soft suspension yet serves as a moisture barrier.
The Granite-52 speakers are made with a waterproof poly propylene injection molded cone. The surround is
made of butyl rubber and the front of the shaft is totally sealed from the back so no water will get trapped
inside.
Granite-10D Design
• 10" long excursion dual coil driver
• 2.5" diameter voice coil with 1.5" winding height
Granite-10D is a dual voice coil long excursion subwoofer. It has a massive motor that is unconventional in the
outdoor rock speaker market. The voice coil has a whopping 2.5" diameter and 1.5" winding height. The
overall excursion is over 2" peak to peak. Due to its voice coil winding height, the Granite-10D produces more
sound pressure level, SPL, while using less current from your amplifier.
Conventional rock speakers are totally sealed and will heat up to a temperature that exceeds 180 degrees. So
as soon as you turn on the music, the rock speaker only gets hotter. Not the Granite-10D.
Granite-10D has a clever ported design that allows the subwoofer to release the hot air. This port is a tube that
has an opening in the lower back side but extends upward inside the box to prevent moisture and water from
being trapped inside. In addition to keeping the subwoofer cool, this port adds 3dB of bass. 3dB is equal to half
the volume.
Like the Granite-52, the Granite-10D also has a poly propylene injection molded cone with a butyl rubber
surround.
Specifications
Frequency
Response (±3dB)
Recommended
Amplifier Power
Nominal Impedance
Sensitivity(1W@1M)
Woofer
Tweeter
Dimensions
(HxWxD)
Finish
Enclosure
ROCK-on Manual
8
Granite-10D
30Hz-100Hz
20-400 Watts
92dB
10" (254mm)
Two 2.5" diameter voice coils
N/A
14" (356mm)
18 1/2" (470mm)
21" (546mm)
Granite rock
15mm epoxy resin
Earthquake Sound Corp. | (800) 576-7944 | www.earthquakesound.com
Granite-52
50Hz-21kHz
40-200 Watts
93dB
5 1/4"
(133mm)
½" (13mm)
Mylar
8 1/2" (216mm)
8 1/2" (216mm)
9" (229mm)
Granite rock
15mm epoxy resin
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