EarthQuake Pro-X128 Installation and operating manual

Earthquake Sound reserves the right to amend the details of the specifications without notice.
© Copyright Earthquake Sound Corporation
Earthquake Europe | Mogensensvej 29 - 5000 Odense C - Denmark
www.earthquakesound.eu | www.earthquakesound.dk

www.earthquakesound.eu | www.earthquakesound.dkSpecifications are subject to change without notice
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Introducing the Pro-X Series
Pro-X is the line of high sensitivity wide-band professional woofers from Earthquake
Sound. Built with the accumulative knowledge and expertise gained from
manufacturing industry defining woofers for 30 years. Pro-X is proof positive that the
combination of high performance and superior value is possible!
ForFor years it’s been our analysis that the pro woofer market has a huge split between
performance and value. The leading brands build $1500+ starship woofers and an
almost unending slough of no-name brands flood the market with cheap, but
essentially worthless woofers. We offer Pro-X as the meaningful solution. Providing
near enterprise level performance at less than a third of the cost.
Building the Pro-X
Typically when designing a statement
product its an exercise in the use of exotic
materials and blatant disregard for the cost
as a way of infusing exclusivity into the
product.
WithWith Pro-X the goal was just the opposite -
chip away all non-essentials and unearth the
raw essence of performance. During this
process we developed several technologies
and design attributes that would come to be
essential for the final product.
CAUTION: Earthquake's Pro-X woofers are capable of generating high sound
pressure levels. You should exercise caution when operating our woofers and
amplifiers. Long term exposures to high levels of sound pressure will cause
permanent hearing damage. Sound pressure levels exceeding 85dB can be
dangerous with constant exposure. Earthquake Sound Corporation does not
assume liability for damages resulting from the direct use of or other Earthquake
products, and urges users to play sound systems at moderate listening levels for
everyday use.everyday use.
PRO-X18-4 PRO-X15-8 PRO-X12-8
Dear Valued Customer,
Earthquake Sound Corporation, located in Hayward California, specializes in
manufacturing high end car audio products ranging from the smallest titanium tweeter
to the world’s largest amplifiers & subwoofers.
ThisThis owners manual is designed to better acquaint you with the Pro-X woofers and to
guide you through all phases of system design and application. It is imperative that you
read this manual in its entirety, Earthquake technicians and staff are looking forward to
answering any questions you might have.
INTRODUCTION / SPECIFICATIONSINTRODUCTION / SPECIFICATIONS

www.earthquakesound.eu | www.earthquakesound.dkSpecifications are subject to change without notice
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High Gauss Ceramic Magnet
The brute magnetic force in the Pro-X is supplied by an oversized ceramic magnet.
This high Gauss magnet concentrates immense magnetic flux on the voice coil
resulting in stellar efficiency and tight chest slamming low frequency response.
Designed with a bumped back extended pole piece for added excursion potential.
This also protects the voice coil from bottoming out in case of transient overload.
Legendary ChassisLegendary Chassis
Any seasoned pro audio tradesman will recognize the chassis and smile. Yes it is 30+
years old, but from a performance viewpoint - a better one has yet to be made.
This efficiently transports air around the voice
coil and reduces the air resistance on the
moving voice coil itself.
TheThe result is a remarkably capable cooling
system that compared to a traditional pole
venting scheme, reduces temperatures by 40
percent. All without adding acoustic artifacts
or cost to the equation.
PWT Voice Coil
The PWT (Parallel Winding Technology) voice coil is a quite simple but effective
method for approaching esoteric edge-wound voice coils in efficiency and thermal du-
rability. Ordinary voice coils are wound with a single wire applied to the former x
number of turns.
The PWT coil uses two thinner wires applied to the former in parallel (wound side by
side) x number of turns. This significantly increases surface area for improved thermal
rigidity while keeping the same impedance as if regular single strand wire had been
used. At a fraction of the cost of edge-wound, the PWT voice coil is instrumental in
keeping the price down and performance up.
L-RAE Motor Cooling Geometry
Pro-XPro-X features the L-RAE (Large Radial Air Emitter)
cooling scheme, and is the first Earthquake product
to do so. We had intended to use our patented TCT
(Turbine Cooled Technology); however, TCT was
developed for heavy, long stroke woofers and was
not ideal for the quick, taunt and agile characteristics
of the Pro-X woofer.
L-RAEL-RAE is comprised of large unrestricted passages
offering zero resistance to the moving air. A large
drilled out pole piece with above spider side venting
channels is combined with oversized radial cooling
passages, matching the diameter of the voice coil.
INTRODUCTION / SPECIFICATIONSINTRODUCTION / SPECIFICATIONS

www.earthquakesound.eu | www.earthquakesound.dkSpecifications are subject to change without notice
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Versatility
Although designed as a pro audio woofer, it can be used in both home and automotive
solutions with great success. It can be used in any application where large amounts of
low distortion, wide-band acoustical power is needed. It is ideal for use in small sealed
and ported enclosures as well as bass and mid-bass horns. Featuring a very shallow
mounting depth the Pro-X can be used in specialty form factor systems.
VValue
Built from the ground up with the fundamental elements that makes a product distinctly
Earthquake - Power, Performance and Quality. Pro-X offers amazing performance at
an unparalleled price. It is our sincere belief that the combination of price, performance
and quality makes the Pro-X the best in this category on the market today.
Proven Track Record
ForFor 3 decades Earthquake has been designing and manufacturing top quality audio
equipment. The Pro-X is no exception to this ledger of excellence. We are certain they
will provide many years of faithful service.
Highlights
• High efficiency / High sensitivity
• 4-inch high power PWT voice coil
• Die cast basket with jet-black finish
• L-RAE (Large Radial• L-RAE (Large Radial Air Emitter) cooling system
• High Gauss Ceramic magnet with bumped back extended pole piece
• Accordion type UV treated cloth surround
• Push on terminals
*Pro-X12-8, Pro-X15-8, Pro-X18-4 are sold and priced per piece
INTRODUCTION / SPECIFICATIONSINTRODUCTION / SPECIFICATIONS

www.earthquakesound.eu | www.earthquakesound.dkSpecifications are subject to change without notice
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14” / 355.6mm
9” / 228.6mm
12” / 304.8mm
14” / 355.6mm
14” / 355.6mm
17” / 431.8mm
Diameter: 4”/ 101.6mm
Depth: 8”/ 203.2mm
17” / 431.8mm
10” / 254mm
17” / 431.8mm
14” / 355.6mm
17” / 431.8mm
21” / 533.4mm
Diameter: 4”/ 101.6mm
Depth: 9”/ 228.6mm
PRO-X15-8 ENCLOSURE DESIGNSPRO-X12-8 ENCLOSURE DESIGNS

Specifications are subject to change without notice
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21” / 533.4mm
11” / 279.4mm
21” / 533.4mm
15” / 381mm
21” / 533.4mm
24” / 609.6mm
Diameter: 4”/ 101.6mm
Depth: 10”/ 254mm
PRO-X18-4 ENCLOSURE DESIGNS
Earthquake Sound reserves the right to amend the details of the specifications without notice.
© Copyright Earthquake Sound Corporation
Earthquake Europe | Mogensensvej 29 - 5000 Odense C - Denmark
www.earthquakesound.eu | www.earthquakesound.dk