LU-050107
Sound That Will Move You
DBXi Subwoofer
Installation
&
DBXI-10
DBXI-10D
DBXI-12
DBXI-12D
DBXI-15
DBXI-15D
Reference Manual
Earthquake Sound Corporation • 2727 McCone Avenue Hayward, CA 94545 • Ph: (510) 732-1000 Fax (510) 732-1095
How To Wire Your Earthquake Subwoofer In Parallel
OHMS-LAW
Series formula:
PARALLEL WIRING
Rt= R1+R2+R3+....
Study sample diagram
below, then follow charts to
the left.
Where R= Total system impedance
Where Rt= Resistance seen by amplifier
4-Ohm VC.
If using SINGLE 2 OHM coils the total load would be 2.0 ohm
If using SINGLE 4 OHM coils the total load would be 4.0 ohm
If using SINGLE 6 OHM coils the total load would be 6.0 ohm
If using SINGLE 8 OHM coils the total load would be 8.0 ohm
Ohms 2, 4, 6, 8
8-Ohm
4-Ohm VC.
Example for Dual-4 series
If using SINGLE 2 OHM coils the total load would be 1.0 ohm
If using SINGLE 4 OHM coils the total load would be 2.0 ohm
If using SINGLE 6 OHM coils the total load would be 3.0 ohm
If using SINGLE 8 OHM coils the total load would be 4.0 ohm
Ohms 2, 4, 6, 8
4-Ohm
Example for single-4
4-Ohm VC.
If using SINGLE 2 OHM coils the total load would be .66 ohm
If using SINGLE 4 OHM coils the total load would be 1.3 ohm
If using SINGLE 6 OHM coils the total load would be 2 ohm
If using SINGLE 8 OHM coils the total load would be 2.7 ohm
2-Ohm
4-Ohm VC.
Ohms 2, 4, 6, 8
Example Dual-4 Parallel
If using SINGLE 2 OHM coils the total load would be 0.5 ohm
If using SINGLE 4 OHM coils the total load would be 1.0 ohm
If using SINGLE 6 OHM coils the total load would be 1.5 ohm
If using SINGLE 8 OHM coils the total load would be 2 ohm
Ohms 2, 4, 6, 8
EARTHQUAKE SOUND • PARALLEL WIRING CONFIGURATIONS
3
DBXI ENCLOSURE DESIGNS
10.80” 274.5mm
9.84” 250mm
12.91” 328mm
11.889” 302mm
DBXI-10
DBXI-12
DBXI-10D
DBXI-12D
6.417” 163mm
6.417” 163mm
Dimensions shown are external .75” MDF.
DBXI-10/10D
Bass head design for competition
Port tuned design for deep bass
Sealed design for tight bass
#1Ported box Recommendation: 1.14-1.5cu.ft. #2Ported box Recommendation: .8-1.25cu.ft. #3Sealed box Recommendation: .77-1.0cu.ft.
16”
15”
12”
16.5”
12.5”
12.5”
13”
Port
12"
12"
12”
Diameter: 4"
Depth: 8.5”
DBXI-10/10D
DBXI-10/10D
DBXI-10/10D
DBXI-12/12D
Bass head design for competition
#1 Ported box Recommendation: 1.8-2.5cu.ft. #2 Ported box Recommendation: 1.5-1.75cu.ft.
Port tuned design for deep bass
Sealed design for tight bass
#3 Sealed box Recommendation: .9-1.25cu.ft.
16.5”
16”
19”
14”
20.5”
15”
9”
13”
14”
14”
14”
DBXI-12/12D
DBXI-12/12D
DBXI-12/12D
Specifications are subject to change without notice.
4
EARTHQUAKE SOUND • DBXI SUBWOOFER ENCLOSURE DESIGNS
DBXI ENCLOSURE DESIGNS
15”
13.75”
DBXI-15D
DBXI-15
6 1/2”
Dimensions shown are external .75” MDF.
DBXI-15/15D
Bass head design for competition
Port tuned design for deep bass
Sealed design for tight bass
#1 Ported box Recommendation: 3.5-4.2cu.ft. #2 Ported box Recommendation: 2.2-2.5cu.ft. #3 Sealed box Recommendation: 2.0-2.5cu.ft.
22”
16.5”
23”
18”
22.5”
14”
16”
9”
18”
18”
18”
DBXI-15D
DBXI-15D
DBXI-15D
Passive tuned design for deep bass small volume
#4
Drone Tuned Box
VB = 2.5cu.ft.
FB = optimized with
SLAPS-15 passive
Specifications are subject to change without notice.
EARTHQUAKE SOUND • DBXI SUBWOOFER ENCLOSURE DESIGNS
5
Earthquake, DBXI
Dear Valued Customer,
Earthquake Sound Corporation, located in Hayward California at the heart of the San Francisco Bay Area; specializes in manufacturing high end car audio products
ranging from the smallest titanium tweeter to the world’s largest amplifier. In its dedication to excellence, Earthquake has maintained extensive programs in research and
development toprovide you with the highest quality mobile audio products.
This owners manual is designed to better acquaint you with Earthquake products and to guide you through all phases of system design and application. It is imperative
that you read this manual in itsentirety. Earthquake technicians and staffare looking forward toanswering any questions you might have.
CAUTION: Earthquake's DBXI subwoofers are capable of generating high sound pressure levels. You should exercise caution when
operating our subwoofers 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 DBXI or other Earthquake products , and urges users to play sound systems at
moderate listening levels forevery day use.
DBXI DUAL & VOICE COIL SUBWOOFER SPECIFICATIONS
DRIVER:
DBXI-10
DBXI-10D
DBXI-12
DBXI-12D
DBXI-15
DBXI-15D
Free Air Resonance (Fs)
28 Hz
27 Hz
25 Hz
24 Hz
21 Hz
20 Hz
Electrical “ Q” (Qes)
Mechanical “ Q” (Qms)
Total Speaker “ Q” (Qts)
Xmax
0.497
0.497
0.45
0.45
1.13
1.14
8.458
8.458
4.70
4.70
5.98
5.99
0.52
0.5
.5
.5
.45
.45
3" / 76.2mm
85 dB SPL
5.2 Ohm
17.6TM
3" / 76.2mm
85 dB SPL
5.2 Ohm
17.6TM
3.5" / 88.9mm
87 dB SPL
4.8 Ohm
23.7TM
3.5" / 88.9mm
87 dB SPL
4.8 Ohm
23.7TM
3.5" / 88.9mm
88 dB SPL
4.0 Ohm
26.8TM
3.5" / 88.9mm
88 dB SPL
4.0 Ohm
26.8TM
Efficiency (1W/1M)
REVC
BL
21.9 Lit / .773 ft3
4-Ohm
21.9 Lit / .773 ft3
Dual 4-Ohm
46.4 Lit / 1.639 ft3
4-Ohm
91.1 Lit / 3.217 ft3
4-Ohm
91.1 Lit / 3.217 ft3
Dual 4-Ohm
46.4 Lit / 1.639 ft3
Dual 4-Ohm
VAS
Nominal Impedance
Recommended Power
400 WRMS
1000 Watts MAX
400 WRMS
1000 Watts MAX
500 WRMS
1500 Watts MAX
500 WRMS
1500 Watts MAX
750 WRMS
2000 Watts MAX
750 WRMS
2000 Watts MAX
6
EARTHQUAKE SOUND • SUBWOOFER SPECIFICATION CHARTS
CAUTION: Earthquake's DBXI subwoofers are capable of generating high sound pressure levels. You should exercise caution when
operating our subwoofers 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 DBXI or other Earthquake products , and urges users to play sound systems at
moderate listening levels forevery day use.
EARTHQUAKE SOUND CORPORATION
7
Sound That Will Move You
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