Definitive Technology PROSUB 800/1000 - Manual (Page 7)

bass output when using full range main speakers, run the main speakers
full range by hooking them up directly to the amp. In many systems, if
your speakers are true full range systems, you may find that you get a
more satisfying sound by running the speakers full-range and crossing
your subwoofer in fairly low (40-70 Hz). On the other hand, if you find
that you are overdriving your main speakers, you will clearly be able to
play your system louder by using the built-in high pass crossover for
your main speakers.
The Advantages of Multiple Subwoofers
Definitive’s ProSub subwoofers are engineered to be used singly or in
pairs. With a single subwoofer, both left and right signals are sent to the
subwoofer wherein they are combined via the electronic crossover into
one composite signal. With two subwoofers, the left and right low fre-
quency signals can be reproduced by their own individual subwoofers or
two subwoofers can be just doubled up on the LFE channel with a Y con-
nector. The use of one subwoofer achieves outstanding performance;
however, the addition of a second subwoofer clearly offers the highest
level of performance achievable for both movies and music. The use of
stereo subwoofers smoothes out the peaks and dips which result from the
eigenmodes in your room. Two subwoofers couple much better to the air
in your room (four times better) and of course offer double the power. In
addition, some state-of-the-art home theater installations have begun
to use a separate subwoofer hooked up to the rear (surround) chan-
nels and we recommend this for the absolute ultimate in performance.
In addition, some state-of-the-art Dolby Digital* home theater instal-
lations have begun to use a separate subwoofer hooked up to the rear
(surround) channels and we recommend this for the absolute ultimate
in performance.
Dual Subwoofer Connections
When hooking up a stereo pair of subwoofers, wiring is quite similar to
traditional high level connections. Here, instead of running both speaker
cables from your receiver or amplifier to the left and right high level terminals
on the subwoofer, you will run the left channel to the left channel subwoofer
and the right channel to the right channel subwoofer. Again, take care to make
red to red (“+”) and black to black (“-”) terminal connections.
Don’t worry that on your left subwoofer the right channel terminals
will be empty and that on the right channel subwoofer the left channel
terminals will be empty—both channels are combined at the subwoofer’s
input stage. There is a possibility that with this type of wiring you may
need to increase your gain a little bit for proper balance.
A dual subwoofer system using low level connections is equally
simple, just put a Y connector on your LFE output and run one cable
to each subwoofer.
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Your receiver or decoder has a bass management system which
ABSOLUTELY must be set for you to get proper performance from
your system. This is not something that is subtle in its importance.
It is absolutely critical. In general if you are setting up a ProCinema
System using our ProSubs, ProMonitors and ProCenters, follow these
simple instructions:
• If you are hooking up the sub with the low level LFE connection,
set your receiver/decoder bass management to “Sub – Yes” and set
left main, right main, center, left rear and right rear to “Small.”
• If you have a choice of crossover frequency, choose the highest
one available.
• If you use a speaker level connection where you run the speaker
wire from the receiver to the sub adn then from the sub to the left
and right mains, set “Sub – No,” left main and right main to
“Large,” and center, left and right rear to “Small.”
• Also make sure you properly set the channel balance as outlined
in your receiver/decoder manual. There is also more detailed
information in your ProMonitor manual.
Critical Bass Management Settings
*NOTE: If you
wish to run your
main speakers
full range with
no low frequency
roll-off, hook
them directly to
the main speaker
output terminals
or your receiver
or amplifier as in
any normal hi-fi
system.
AMPLIFIER OR RECEIVER