JBL Car Speaker P1020DII User Manual

®
POWER SERIES  
®
Automotive Subwoofers Owner’s Manual P1020 II P1020D II P1220 II P1220D II  
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Connecting Your Subwoofer to Your Amplifier JBL Power Series  
Figure 2. Series connection  
To design a subwoofer system  
that maximizes available amplifier  
power, keep the following rules  
in mind:  
1. The total system impedance of  
woofers in parallel = 1/(1/w1 +  
1/w2 + 1/w3...), where w is the  
nominal impedance of the  
woofer.  
JBL Power Series subwoofers  
are available in two different  
configurations: as a single 2-ohm  
voice coil or as dual 2-ohm voice  
coils. Depending on the amplifiers  
you are using, you may use either  
single-voice coil or dual-voice coil  
subwoofers in singles or multiples  
to maximize the power available  
from your amplifiers. To achieve  
the maximum amplifier output  
possible, you should design a  
speaker system that provides  
the lowest impedance that  
your amplifier is rated to drive  
safely. When designing a  
subwoofer system, consider  
the following rules:  
1. Don’t mix different subwoofer  
or enclosure types in the same  
system (use all single-coil  
2. You may connect the coils of a  
dual-voice coil woofer in series,  
but we recommend that you  
avoid connecting separate  
woofers in series. Because the  
amplifier-damping factor (the  
amplifier’s ability to control  
the motion of the woofer) is  
expressed as a ratio of terminal  
impedance (the sum of speaker  
impedance, wire resistance and  
the D.C. resistance of any  
crossover coil connected to the  
woofer) to amplifier-output  
impedance, connecting separate  
woofers in series reduces the  
damping factor of the amplifier  
to a value less than 1. This will  
result in poor transient response.  
3. You must use both coils of a  
dual-voice coil woofer connected  
either in series or in parallel.  
4. Most amplifiers deliver exactly  
the same amount of power  
bridged into a 4-ohm load  
BLACK  
RED  
STRIPE  
NEG ( – )  
STRIPE  
POS ( + )  
POS ( + )  
NEG ( – )  
2. The total system impedance  
of voice coils (or woofers) in  
series = w1 + w2 + w3...  
The diagrams below and at right  
show parallel and series speaker  
connections.  
Figure 1. Parallel connection  
BLACK  
RED  
STRIPE  
NEG ( – )  
STRIPE  
POS ( + )  
woofers or all dual-coil woofers).  
POS ( + )  
NEG ( – )  
as they do running a 2-ohm  
stereo load.  
03  
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Specifications JBL Power Series  
P1020II  
P1020DII  
P1220II  
P1220DII  
10" Automotive  
subwoofer  
10" Automotive subwoofer,  
dual-voice coil  
12" Automotive  
subwoofer  
12" Automotive subwoofer,  
dual-voice coil  
Power handling (RMS)  
Power handling (peak)  
400 Watts  
400 Watts  
400 Watts  
400 Watts  
1600 Watts  
1600 Watts  
1600 Watts  
1600 Watts  
Sensitivity (2.83V/1m)  
Frequency response  
89dB  
92dB  
91dB  
95dB  
25Hz – 500Hz  
25Hz – 500Hz  
20Hz – 450Hz  
20Hz – 450Hz  
Impedance  
2 Ohms  
Dual 2 Ohms  
2 Ohms  
Dual 2 Ohms  
Mounting depth  
Cut-out diameter  
6" (153mm)  
9-3/16" (234mm)  
6" (153mm)  
6-3/4" (172mm)  
11" (280mm)  
6-3/4" (172mm)  
11" (280mm)  
9-3/16" (234mm)  
Declaration of Conformity  
We, Harman Consumer International  
2, route de Tours  
72500 Chateau-du-Loir  
FRANCE  
JBL Consumer Products • 250 Crossways Park Drive, Woodbury, NY 11797  
1-800-336-4JBL (4525) www.jbl.com  
declare in own responsibility, that the products described in this owner’s manual are in  
compliance with technical standards:  
©2003 Harman International Industries, Incorporated  
JBL is a registered trademark of Harman International Industries, Incorporated  
EN 50081-1:1992  
EN 50082-1:1997  
Emmanuel Millot  
Harman Consumer International  
FRANCE 4/03  
Part No. P1020-D/P1220-DOM4/03  
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