Crunch Ground Pounder GP10D2, Ground Pounder GP10D4, Ground Pounder GP12D2, Ground Pounder GP12D4, Ground Pounder GP15D2 Owners And Installation Manual

Hifonics,™ Crunch,™ & Maxxsonics™

are part of the Maxxsonics USA, Inc. family.

www.maxxsonics.com

847-540-7700

GP10D2 / GP10D4 / GP12D2 / GP12D4 / GP15D2

Owners / Installation Manual

WOOFER SERIES

WOOFER SERIES

1

Congratulations on your purchase of

the Crunch Ground Pounder Series Woofer.

This manual has been prepared to help you make a decision on the woofer
enclosure, and desired tuning for a particular application. As you can see on the
following pages, there are many possible variations of woofers, and enclosure
sizes that may be used to achieve a specific performance.

Considering all space, and power handling limitations, choose the woofer and
enclosure size that will give you the desired performance for your application.
All measurements used to calculate the volume are internal measurements.
Always allow for the thickness of the wood.

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Ground Pounder Subwoofer Introduction

Ground Pounder has arrived. This new Crunch subwoofer series has been
designed to carry the weight of the audio world on its shoulders. All competitors
beware. You will not survive the impact of Ground Pounder.

Designed to handle BIG power, the Ground Pounder Subwoofers features a
black chrome baskets and a 100-ounce magnet structures.Ground Pounders
will work in small sealed for those of you that want to shake the neighborhood,
the Ground Pounder will work in big ported as well. Ground Pounder proves that
once and for all Crunch USA you can “Feel the Power”. Just one look and you
can see quality, mechanical ability and sheer ground pounding beauty.

Black Chrome Basket – Adds exponential strength and the ability to hold
Ground Pounders big motor structure

Titanium treated PP Cone –The Titanium of the cone enables lower than low
frequencies, handle the bass and power you want and, provides a very musical
subwoofer

Glass Kevlar Illuminated Dust Cap – Illuminate your world with our blue LED
SoundLight

TM

Design Spider with Woven Tinsel Leads-Allows a very reliable and

active spider and with the woven leads you need not worry about broken tinsel
leads under strenuous conditions.

NOTES

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WIRING:

Wiring (Series or Parallel). The wiring of two or more drivers can effect impedance for
the entire system. Care must be taken to insure that the resulting impedance does not
exceed the amplifiers requirements or limits.

The GP10D2,GP12D2, and GP15D2 are 2-Ohm Dual-Voice-Coil (DVC). These woofers
can be wired for 4-Ohms or 1-Ohm configurat ions shown on page 5. GP10D4 / GP12D4
2-Ohms or 1-0Ohm wiring configurat ions are shown on page 6.

BRACING:

Internal bracing is encouraged to prevent flexing, and to strengthen the cabinet.

NOTE: Volume taken up by the bracing must be added to the total enclosure volume.
There are three main types of bracing, they are:
— Corner Bracing: Corner bracing helps to strengthen the cabinet and prevents

splitting of particleboard caused by screws going into the panel edge. Use a 1” X 1”
at all corner joints, glued and screwed.

— Diagonal Bracing: Diagonal bracing on all panels, prevents panel flexing under high

sound pressure conditions. Remember that any flexing panels wil l produce
unwanted sound vibrations, which can lead to a “muddy sound”. Use a 1”X 2”, with
1” surfaced glued and screwed to the panel.

— Cross Bracing: Cross braces used between opposite panels will tie them together

as one structure, again helping to prevent panel flexing.

CABINET MATERIAL:

Generally 5/8” to 3/4” material should be used on all enclosures. The following is a list of
commonly used construction materials.

- Baltic Birch Plywood / Marine or Exterior Rated, 13 to 19-ply min.

- Medium Density FiberBoard: The best overall material for speaker cabinets, MDF is
extremely rigid, and is able to withstand high-pressure levels.

DAMPING:

All inside surfaces should be lined with 1/2” thick Dacron fiber fill for sound
damping. Be sure to attach the insulation firmly to prevent interf erence with woofer(s)
and or port(s).

Maxxsonics Limited Warranty

As the manufacturer of Maxxsonics, Crunch and Hifonics car audio products,
Maxxsonics USA Inc. warrants to the original purchasing consumer the
speakers and subwoofers to be free from defects in material and workmanship
for one (1) year from date of purchase.

To ensure your warranty policy, you must retain your original sales receipt.

All other parts and accessories of the speaker system are warrantied to be free
from defects in materials and workmanship for for one (1) year from date of
purchase. Maxxsonics will repair or replace at its option and free of charge dur­ing the warranty period, any system component that proves defective in materi­als and workmanship under normal installation, use and service provided that
the product is returned to the authorized Maxxsonics dealer from where it was
purchased. A photo copy of the original receipt must accompany the product
being returned.

Any damage to the product as a result of misuse including blown voice coils,
abuse, accident, incorrect wiring, improper installation, alteration of date code,
alteration of bar code, revolution, natural disaster, unnatural disaster or any
sneaky stuff because someone messed up, repair or alteration outside of our
authorized service centers and anything else you may have done that you
should not have done is not covered.

This warranty is limited to defective parts and specifically excludes any inciden­tal or consequential damages connected therewith.This warranty is not to be
construed as an insurance policy.

Warranty on installation labor, removal, re-installation and freight charges are
not the responsibility of Maxxsonics USA Inc.

Maxxsonics Limited Warranty is only recognized when product is purchased
through Maxxsonics authorized dealer or distribution channels.

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8

Specifications Measurement GP10D2 GP10D4 GP12D2 GP12D4 GP15D2

NomZ Ohms 2 + 2 4 + 4 2 + 2 4 + 4 2 + 2
Sd sqM 0.0327 0.0327 0.0495 0.0495 0.0809
Revc Ohms 0.95 1.525 0.95 1.525 0.95
BL T x M 9.94 11.3 9.94 11.3 9.94
Vas Liter / Cu.Ft. 18.38/.65 18.38/.65 42.11/1.49 42.11/1.49 112.5/3.97
Cms uM/N 121 121 121 121 121
Mms Grams 164.4 155.4 203.3 194.3 280.2
Fs Hz 35.68 36.7 32.09 32.82 27.33
Qms 3 3 3 3
Qes 0.354 0.428 0.394 0.479 0.463
Qts 0.317 0.375 0.348 0.413 0.401
SPL @ 1W dB 85.76 85.31 87.52 86.97 89
SPL @ 2.83v dB 95.02 92.51 96.77 94.17 98.25
Xmax mm 15 15 15 15 15
Watt @ RMS Watts 500 500 600 600 700
Watt Peak Watts 1000 1000 1200 1200 1400

Sealed

Box Volume Cubic Feet 0.5 0.5 1 1 2
Fc Hz 53.37 54.78 49.99 51.32 46.83

Vented

Box Volume Cubic Feet 0.7 0.7 1.2 1.2 2.5
Fb Hz 37.61 35.14 33.04 33.2 30.82
Port Size Inches D x L 2.5" x 10" 2.5" x 10" 3" x 10" 3" x 10" 4" x 10"
Fp Hz 36.92 36.92 36.34 36.34 32.5

ENCLOSURES

ELECTRICAL

GROUND POUNDER

FORMULA FOR VOLUME:

Volume for cu. Ft.=H (in) X W (in) X D (in) ÷1728
(Divide by 1,728 to convert to cubic feet)

SUBWOOFER SPECIFICATIONS

TROUBLESHOOTING:

Basic Problem Possible Solution

No Sound from Speaker Confirm power is on from all components.

Very Low Sound Adjust f ader cont rol. Che ck connec ti on ca bles

equipment. Etc...

Unnatural Bass Emphasis Adjust loudness contour. Crossover points, bass

control, etc...

Whining Sound Clean and tighten power/ground connections.

Check all cables and contacts. Check all grounding
points. Check for rear-seat occupant.

Distortion at Very Check gain control Check amplifier input or output
High Listening Levels controls. Check for a blown ear.

No High Frequency Output Check passive crossover/active crossover. Check

all cable s and connect ions.

NOTES

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7

GLOSSARY OF TERMS:

Q The system losses of relative damping (ratio of stored to dissipated

energy or ratio of reative to resistive energy.
Fs Free air resonance of driver in Hz.
Qms Mechanical Q of system.
Vas Volume of air equivalent to driver from rest position.
Cms Mechanical compliance of a loudspeaker piston.
Mms Moving mass of total loud speaker piston assembly.
Xmax The maximum linear excursion of a loudspeaker piston.
Sd Surface area of cone.
Dia The piston diameter of a loudspeaker.
Qes Electrical Q of system.
Re DC resistance.
Le VC inductance.
Pe Ma ximum input power.
Qts Total Q of system.
Sens Sensitivity. An efficency measurement in decibels/dBs
Vc Volume of a closed enclosure.
Vb Volume of a vented enclosure.
Fc The resonant frequency of a closed box system.
Fb The resonant frequency of a vented box system.
F3 The half-power (-3dB) frequency of a loudspeaker enclosure design.
Qtc The Q of a loudspeaker at Fc in a closed box, considering both its

electrical and mechanical resistance.
QL The Q of a vented box, resulting from all box losses.
Fill The a coustic absorption added inside a box t o suppress unw anted

resonance.
Ports Number of ports.
DV Dia met e r of v en t.
LV L e n g t h of v e n t.
H Height
W Width
D Depth

LED CONNECT:

1. Connect the LED (+) spade terminal to an accessory switched +12 volt wire. This
wire should have +12 volts when the ignition key is “on” and 0 volts when the ignition
key is “off”.

2. Connect the LED (-) spade terminal to chassis ground.

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