MK Sound MX-350THX, MX-5000THX User Manual
operation
manual
MX-5000THX Mk II
MX-350THX
Miller & Kreisel Sound Corporation
10391 Jefferson Boulevard
Culver City, CA 90232 USA
(310) 204-2854 FAX (310) 202-8782
© 1997 MILLER & KREISEL SOUND CORP.
THX®powered subwoofers
Manufactured under license from Lucasfilm Ltd.
Lucasfilm and THX are registered trademarks of
Lucasfilm Ltd.
THX subwoofers
page 2
TABLE OF CONTENTS
1. SAFETY INSTRUCTIONS................................................................................................3
2. INTRODUCTION ..............................................................................................................4
3. WHERE TO PLACE YOUR SUBWOOFER .....................................................................4
4. OPERATION WITH THX COMPONENTS........................................................................4
CONNECTING THE SUBWOOFER TO A THX CONTROLLER........................................................... 4
TESTING THE SUBWOOFER (THX)..........................................................................................................6
5. CALIBRATING THE SUBWOOFER (THX)......................................................................6
OPERATION OF THE "LOW PASS FILTER" AND "BASS LEVEL" SWITCHES ....................................... 6
OPERATION OF THE "BASS EQ" SWITCH (THX) .................................................................................... 6
SETTING SUBWOOFER LEVEL (THX)...................................................................................................... 7
USING TWO SUBWOOFERS (THX) .......................................................................................................... 7
6. OPERATION WITH A NON-THX PROCESSOR.............................................................. 7
OPERATION OF THE "LOW PASS FILTER" SWITCH ............................................................................. 7
OPERATION OF THE "BASS EQ" SWITCH............................................................................................... 8
OPERATION OF THE THE "BASS LEVEL" SWITCH ................................................................................. 8
WIRING WITH A NON-THX PROCESSOR OR PREAMP.......................................................................... 8
USING THE SUBWOOFER WITH THE M&K HP-80 OR VF-80 HIGH-PASS FILTERS ......................... 10
TESTING THE SUBWOOFER (NON-THX) .............................................................................................. 11
SETTING SUBWOOFER LEVEL (NON-THX) .......................................................................................... 11
USING TWO SUBWOOFERS (NON-THX) .............................................................................................. 11
7. SATELLITE/SUBWOOFER PHASING TEST ................................................................12
8. FINE-TUNING THE PLACEMENT OF YOUR SUBWOOFER .......................................13
SPECIAL METHOD FOR PLACING THE SUBWOOFER........................................................................ 13
9. USE OF SPIKED FEET ..................................................................................................14
10. TROUBLESHOOTING ...................................................................................................14
IF YOU NEED TO REPLACE THE EXTERNAL FUSE ............................................................................ 15
11. IF YOU NEED SERVICE ................................................................................................16
12. SPECIFICATIONS..........................................................................................................16
13. CABINET MAINTENANCE ............................................................................................16
WIRING DIAGRAMS
FIGURE 1 ONE SUBWOOFER TO A THX CONTROLLER....................................................5
FIGURE 2 TWO SUBWOOFERS TO A THX CONTROLLER.................................................5
FIGURE 3 ONE SUBWOOFER TO A SURROUND CONTROLLER (NON-THX) ..................9
FIGURE 4 TWO SUBWOOFERS TO A SURROUND CONTROLLER (NON-THX) ...............9
FIGURE 5 ONE SUBWOOFER TO AN AMP OR PREAMP (NON-THX)..............................10
FIGURE 6 TWO SUBWOOFERS TO AN AMP OR PREAMP (NON-THX)...........................10
THX subwoofers page 3
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
The lightning flash with arrowhead,
within an equilateral triangle, is intended to alert the user of the presence of uninsulated "dangerous voltage" within the product's enclosure
that may be of sufficient magnitude to
constitute a risk of electric shock to
persons.
TO PREVENT THE RISK OF ELECTRIC
CAUTION:
SHOCK, DO NOT REMOVE COVER (OR
BACK). NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
The exclamation point within an equilateral triangle is intended to alert the
user of the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the appliance.
1. SAFETY INSTRUCTIONS
1. READ INSTRUCTIONS - All safety and operating instructions should be read before this product is operated.
1
2. RETAIN INSTRUCTIONS - The safety and operating instructions should be retained for future reference.
3. HEED WARNINGS - All warnings on this product and in the operating instructions should be adhered to.
4. FOLLOW INSTRUCTIONS - All operating and use instructions should be followed.
5. ATTACHMENTS - Do not use attachments not recommended by the product manufacturer as they may cause hazards.
6. WATER AND MOISTURE - Do not use this product near water - for example, near a bath tub, wash bowl, kitchen sink,
7. ACCESSORIES - Do not place this product on an unstable cart, stand, tripod, bracket, or table. The product may fall,
or laundry tub; in a wet basement; or near a swimming pool; and the like.
causing serious injury to a child or adult, and serious damage to the product. Use only with accessories recommended
by the manufacturer, or sold with the product. Any mounting of the product should follow the manufacturer's instructions
and should use a mounting accessory recommended by the manufacturer.
8. POWER SOURCE - This product should be operated only from the type of power source indicated on the marking label.
If you are unsure of the type of power supply to your home, consult your product dealer or local power company.
9. OVERLOADING - Do not overload wall outlets or extension cords as this can result in a risk of fire or electric shock.
10. LIQUID ENTRY - Never spill any liquid of any kind on the product.
11. SERVICING - Do not attempt to service this product yourself. Opening or removing covers, including any over bottom or
side speaker drivers, may expose you to dangerous voltage or other hazards. Refer all service to qualified service personnel.
12. DAMAGE REQUIRING SERVICE - Unplug this product from the wall outlet and refer servicing to qualified personnel
under the following conditions:
a. When the power-supply cord or plug is damaged.
b. If liquid has been spilled, or objects have fallen into this product.
c. If the product does not operate normally by following the operating instructions. Adjust only controls that are
covered by the operating instructions as an improper adjustment of other controls may result in damage and
will often require extensive work by a qualified technician to restore the product to its normal operation.
d. If the product has been dropped or damaged in any way.
e. When the product exhibits a distinct change in performance - this indicates a need for service.
13. REPLACEMENT PARTS - When replacement parts are required, be sure the service technician has used replacement
parts specified by the manufacturer or have the same characteristics as the original part. Unauthorized substitutions
may result in risk of fire, electric shock, or other hazard.
14. SAFETY CHECK - Upon completion of any service or repairs to this product, ask the service technician to perform
safety checks to determine that the product is in proper operating condition.
15. HEAT - This product should be situated away from heat sources such as radiators, heat registers, stoves, or other
products (including amplifiers) that produce heat.
THX subwoofers
page 4
2. INTRODUCTION
Congratulations! Your new M&K THX® subwoofer truly represents the state-of-the-art in subwoofer
performance. The new dimension of deep and powerful bass it provides will both thrill and excite you.
We strongly encourage you to read this owner's manual, as there is a great deal of information
provided here to help you get the best possible performance.
If you have any questions about your subwoofer, please contact your M&K Home THX
or call the M&K factory directly at (310) 204-2854, from 8:30 AM to 5:00 PM Pacific Time. We will be
more than happy to help you with any question, no matter how simple or complex it may be.
For more details on the installation and calibration of your Home THX Audio system, please refer
to the THX Installation & Operation Manual.
THIS OWNER'S MANUAL HAS TWO SETS OF SET-UP INSTRUCTIONS.
ONE SET IS FOR USING THE SUBWOOFER WITH A THX CONTROLLER.
THE OTHER SET IS FOR USE WITH NON-THX PROCESSORS.
To operate it with a THX controller, see Section 4 below.
To operate it with a non-THX controller, see Section 6 (page 7).
Audio dealer,
3. WHERE TO PLACE Y OUR SUBWOOFER
Your subwoofer will deliver excellent performance located virtually anywhere in your room. Unless
you are next to the subwoofer, you will not hear it as a separate source of sound. In fact, its deep bass
will appear to come from your other speakers. Therefore, there is no
either between your Satellite or L/C/R speakers or in any specific location in the room.
You can significantly improve and fine-tune your subwoofer's performance by experimenting with
its placement in the room. For more detailed placement information, please see Section 8 (page 13).
Your subwoofer is magnetically shielded, so you can locate it close to a television without picture
distortion occurring from magnetic deflection of the TV's electron beam.
Wherever you put the subwoofer, you must allow room for ventilation of its heatsink and backplate.
The subwoofer's power amplifier is mounted on the backplate, and it generates heat. Therefore:
1. Do not place the subwoofer against a wall. Leave at least 3 inches clearance for the heatsink.
2. Do not place the subwoofer close to baseboard heaters or forced air heating outlets.
DO NOT PLUG THE SUBWOOFER INTO AN AC OUTLET
UNTIL ALL SYSTEM WIRING IS COMPLETE
need
to place your subwoofer
4. OPERATION WITH THX COMPONENTS
CONNECTING THE SUBWOOFER TO A THX CONTROLLER
The "INPUT" RCA terminals on the subwoofer connect it to the outputs of your THX controller. 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.
THX subwoofers page 5
To connect the subwoofer, run a shielded RCA - RCA interconnect cable from the SUBWOOFER
OUTPUT jack on your THX controller to the "LEFT/MONO" "INPUT" jack on the subwoofer's
backplate. See Figure 1 below.
Some THX controllers have a pair of stereo subwoofer outputs, while others have a single mono
output. Your subwoofer is compatible with both types. If your THX controller has stereo subwoofer
outputs, use a stereo shielded cable, connecting it to the LEFT and RIGHT "INPUT" terminals on the
subwoofer. If your THX controller has only a single mono subwoofer output, use a mono cable and
connect it to the subwoofer's "LEFT/MONO" "INPUT" jack. See Figure 1 below.
Do not use a Y-connector to connect the signal to both the LEFT and RIGHT inputs of the
subwoofer. These inputs are summed to mono in the amplifier input stage, and if they are combined,
the result will be too much gain and bass level.
FIGURE 1- WIRING ONE SUBWOOFER WITH A THX CONTROLLER
SUBWOOFER OUT
THX
CONTROLLER
LOW PASS FILTER
V
75
A
R
I
A
60
B
L
E
50
CENTER SWITCH
POSITION FOR
VARIABLE
LOW PASS
CAUTION
RISK OF ELECTRIC
SHOCK
DO NOT OPEN
RISQUE DE
AVIS:
CHOC ELECTRIQUE.
NE PAS OUVRIR.
120 VAC
50/60 Hz
6 AMP
T
SLOW-BLOW
PHASE
THX MODE
NO LOW
+
MX-350
LEFT/MONO
PASS FILTER
100
80 Hz
24 dB/
OCTAVE
125
INPUT
POWERED SUBWOOFER
THX
RIGHT
BASS EQ
THX
EXTENDED
THX
VARIABLE
BASS LEVEL
REFERENCE
Manufactured under license
from Lucasfilm Ltd.
Lucasfilm and THX are
registered trademarks
of Lucasfilm Ltd.
Made in U.S.A.
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.
MILLER & KREISEL
SOUND CORP.
10391 Jefferson Blvd
Culver City, CA 90232
310/204-2854
+3 dB
+6 dB
FIGURE 2 - WIRING TWO SUBWOOFERS WITH A THX CONTROLLER
use a Y-connector if
your controller has
only one subwoofer
output jack
PHASE
THX MODE
NO LOW
+
LEFT/MONO
PASS FILTER
OCTAVE
80 Hz
24 dB/
MX-350
INPUT
POWERED SUBWOOFER
THX
BASS LEVEL
BASS EQ
RIGHT
EXTENDED
REFERENCE
THX
THX
+3 dB
+6 dB
VARIABLE
Manufactured under license
from Lucasfilm Ltd.
Lucasfilm and THX are
registered trademarks
of Lucasfilm Ltd.
Made in U.S.A.
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.
MILLER & KREISEL
SOUND CORP.
10391 Jefferson Blvd
Culver City, CA 90232
310/204-2854
LOW PASS FILTER
V
A
R
I
A
60
B
L
E
50
CENTER SWITCH
POSITION FOR
VARIABLE
LOW PASS
CAUTION
RISK OF ELECTRIC
SHOCK
DO NOT OPEN
RISQUE DE
AVIS:
CHOC ELECTRIQUE.
NE PAS OUVRIR.
120 VAC
50/60 Hz
6 AMP
T
SLOW-BLOW
THX CONTROLLER
SUBWOOFER OUT
PHASE
THX MODE
NO LOW
+
LEFT/MONO
PASS FILTER
75
100
80 Hz
24 dB/
OCTAVE
125
MX-350
THX
RIGHT
INPUT
POWERED SUBWOOFER
BASS EQ
THX
EXTENDED
VARIABLE
THX
REFERENCE
+3 dB
+6 dB
Manufactured under license
from Lucasfilm Ltd.
Lucasfilm and THX are
registered trademarks
of Lucasfilm Ltd.
Made in U.S.A.
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.
MILLER & KREISEL
SOUND CORP.
10391 Jefferson Blvd
Culver City, CA 90232
310/204-2854
BASS LEVEL
LOW PASS FILTER
V
A
R
I
A
60
B
L
E
50
CENTER SWITCH
POSITION FOR
VARIABLE
LOW PASS
CAUTION
RISK OF ELECTRIC
SHOCK
DO NOT OPEN
RISQUE DE
AVIS:
CHOC ELECTRIQUE.
NE PAS OUVRIR.
120 VAC
50/60 Hz
6 AMP
T
SLOW-BLOW
75
100
125
If you have two subwoofers, do not use a Y - connector to feed both inputs on each subwoofer.
Connect the interconnect cable to the LEFT/MONO "INPUT" only. Run the Left interconnect cable
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