MK Sound V-1250THX Operation Of The Bass Level Switch, Wiring With A Non-Thxprocessor Or Preamp

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)

SUBWOOFER (or MONO) OUT

SURROUND

PROCESSOR

BASS LEVEL				LOW PASS
REFERENCE	LEFT/MONO	RIGHT	+	FILTER
+3 dB	VARIABLE			80 Hz
+6 dB				24 dB/OCTAVE
	THX	INPUT	–
				THX
			PHASE

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.

CAUTION:

DISCONNECT SUPPLY CORD

BEFORE CHANGING FUSE.

REPLACE FUSE ONLY

WITH SAME TYPE.

ATTENTION:

DEBRANCHER AVANT DE

REMPLACER LE FUSIBLE.

UTILIZER UN FUSIBLE

DE RECHANGE

DE MEME TYPE.

Made in U.S.A.
	S O U N D		VAC O R PTO4 AMPR A T I O N
M I L L E R & K R E I S E L		120
			50/60 Hz
1 0 3 9 1 J e f f e r s o n B lv d ,	C u lv e r C it y , C A SLOW9 0-BLOW2 3 2 3 1 0 / 2 0 4 - 2 8 5 4

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.