Earthquake Sound Granite-52Design, Granite-10DDesign, Specifications, Granite-10DGranite-52

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

Granite-10DGranite-52

Frequency	30Hz-100Hz	50Hz-21kHz
Response (±3dB)
Recommended	20-400 Watts	40-200 Watts
Amplifier Power
Nominal Impedance
Sensitivity(1W@1M)	92dB	93dB
Woofer	10” (254mm)	5 1/4”
	Two 2.5” diameter voice coils	(133mm)
Tweeter	N/A	½” (13mm)
		Mylar
Dimensions	14” (356mm)	8 1/2” (216mm)
	18 1/2” (470mm)	8 1/2” (216mm)
(HxWxD)
	21” (546mm)	9” (229mm)

Finish

Granite rock

Granite rock

Enclosure

15mm epoxy resin

15mm epoxy resin

ROCK-on Manual 8 Earthquake Sound Corp. (800) 576-7944 www.earthquakesound.com