CONNECTING YOUR SUBWOOFER TO YOUR AMPLIFIER
JBL Grand Touring Series 2. You may connect the coils of aTo design a subwoofer system Figure 1. Parallel connection
subwoofers are available in two dual-voice coil woofer in series,that maximizes available ampliŢer
different conŢgurations: as dual but we recommend that you avoidpower, keep the following rules
4-ohm voice coils or as dual 2-ohmconnecting separate woofers inin mind:
voice coils. Depending on the series.
ampliŢers you are using, you may1. The total system impedance
use GTO subwoofers in singles or3. You must use both coils of a dual-of woofers in parallel can be
multiples to maximize the powervoice coil woofer connectedcalculated using the formula:
available from your ampliŢers. Toeither in series or in parallel.
1
achieve the maximum ampliŢer Impedance=NOTE: The GTO1004D, GTO1204D
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output possible, you should design 4. Most ampliŢers deliver exactly++...and GTO1504D come with both
w1w2w3
a speaker system that provides the same amount of powerjumpers installed for a parallel
the lowest impedance that yourbridged into a 4-ohm load where w is the nominal conŢguration.
ampliŢer will drive safely. Whenas they do running a 2-ohm impedance of the woofer.
designing a subwoofer system, stereo load.Figure 2. Series connection
consider the following rules:2. The total system impedance
or woofers
1. Do not mix different subwoofersseries can be calculated using
or enclosure types in the samethe formula:
system. Subwoofers being used in
Impedance = w+ w+ w...
the same enclosure or powered123
from the same ampliŢer should
The diagrams at right show parallel
be identical models. MismatchedNOTE: The GTO1002D, GTO1202D
and series speaker connections.
woofers and enclosures canand GTO1502D come with one
result in poor performance fromjumper installed for a series
NOTE: There are two jumpers
your subwoofer system.conŢguration.
supplied with the woofers to make
connections easier.
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