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V-1250THX subwoofer page 9
OPERATION OF THE "BASS LEVEL" SWITCH
When using the subwoofer with a non-THX processor, preamp, etc., this switch should be set to the
"VARIABLE" position. The subwoofer level can then be set independently to match your speakers. The
"CALIBRATED" mark is a reference relative to THX levels. For a discussion of this "CALIBRATED"
mark, please see "OPERATION OF THE BASS LEVEL SWITCH (THX)" on page 7.
WIRING WITH A NON-THX PROCESSOR OR PREAMP
The "FROM PREAMP" RCA terminals on the subwoofer allow you to connect the subwoofer to
preamp-level components other than THX controllers, such as preamplifiers, integrated amps and
receivers with preamp outputs, high-pass filters, crossovers, standard surround sound processors,
etc. All of the input connections and controls for the subwoofer are located on its large metal backplate,
which can be found on the back panel of the subwoofer cabinet.
FIGURE 3 - WIRING ONE SUBWOOFER TO AN AMP OR PROCESSOR
WITH A SUBWOOFER OUTPUT JACK (NON-THX)
If your surround processor has only one PREAMP OUTPUT (and no SUBWOOFER OUT), and you
do not have an M&K High-Pass Filter or crossover, you must use a Y-connector to feed the amplifier
and subwoofer. See Figure 5 above. If you have a surround sound processor with a SUBWOOFER
OUTPUT jack, use it to feed the subwoofer. See Figure 5 on page 10.
Some surround processors/receivers/amps have very low output levels from their SUBWOOFER
OUTPUT jacks. If you do not get enough bass when using the SUBWOOFER OUTPUT jacks on a non-
THX processor, use that processor's PREAMP OUTPUT jacks instead. See Figure 5.
SURROUND
PROCESSOR
SUBWOOFER (or MONO) OUT
RIGHT
LEFT/MONO
INPUT
REFERENCE
80 Hz
24 dB/OCTAVE
THX
VARIABLE
+
PHASE
THX
LOW PASS
FILTER
+3 dB
+6 dB
BASS LEVEL
10391 Jefferson Blvd, Culver City, CA 90232 310/204-2854
M ILLER & KREISEL SO UND CO RPO RATIO N
Made in U.S.A.
T
4 AMP
120 VAC 50/60 Hz
SLOW-BLOW
ATTENTION:
DEBRANCHER AVANT DE
REMPLACER LE FUSIBLE.
UTILIZER UN FUSIBLE
DE RECHANGE
DE MEME TYPE.
CAUTION:
DISCONNECT SUPPLY CORD
BEFORE CHANGING FUSE.
REPLACE FUSE ONLY
WITH SAME TYPE.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AVIS:
RISQUE DE CHOC
ELECTRIQUE. NE PAS OUVRIR
.
Manufactured under license
from Lucasfilm Ltd.
Lucasfilm and THX are
registered trademarks
of Lucasfilm Ltd.