MK Sound MX-5000THX Mk II, MX-350THX If you hear a persistent hum or buzz through the subwoofer

Page 15

THX subwoofers

page 15

 

 

e.If the red LED is still lit, set the "BASS LEVEL" switch to the "VARIABLE" position. Turn the "BASS LEVEL" control to "MIN". Plug a standard RCA cable into the "LEFT/MONO" "FROM PREAMP" jacks. Lightly touch the plug at the free end of the cable. Then turn the "BASS LEVEL" control clockwise. If you hear a buzz or hum from the subwoofer when you touch the cable, the subwoofer is working. Look elsewhere in your system for the problem. If you hear no output, contact your dealer or M&K for service.

f.Make sure all cables are OK. Double check all connections and replace any defective cables.

2.If the midbass range (the area of transition between Subwoofer and Satellite or L/C/R speakers) sounds weak:

See Section 7, SATELLITE/SUBWOOFER PHASING TEST, on page 12. Reverse the position of the "PHASE" switch on the back of the subwoofer. The position that gives the most bass is correct.

3.If you hear a thump through the subwoofer every time you turn the rest of your audio system on (and your subwoofer is plugged in all the time):

Either the preamp, amp, receiver, or surround sound processor is generating the thump, and the subwoofer is reproducing it. Contact your dealer or the manufacturer of the other component.

4.If you hear a persistent hum or buzz through the subwoofer:

Because the subwoofer easily reproduces 60 Hz signals (the frequency of hum), it is often blamed for causing hum that originates elsewhere in the system. Always avoid running all speaker wires and RCA interconnect cables near to AC cords and component power supplies. Placing wires and cables close to AC lines often results in hum. If necessary, reroute your cables.

To identify a source of hum, remove all input cables to the subwoofer, but leave it plugged into the AC outlet. Set the "BASS LEVEL" switch to the "VARIABLE" position. Carefully turn the "BASS LEVEL" control up towards the "MAX" position. If you hear hum from the subwoofer, it is the source of hum. If you hear no hum or much less hum, the problem is in another component or a ground loop.

For ground loop problems, when the subwoofer is plugged into a separate AC outlet, try plugging it into the same outlet as your amplifier or receiver. If that doesn't work, reverse the polarity of its AC plug. If you cannot solve the problem, call M&K or your dealer.

5.If you hear an unusual sound from the subwoofer when no signal or music is playing:

Try removing the input cables as described in Step 4 above. If the noise disappears, it is coming from another component. If it does not go away, contact your M&K dealer or the factory.

6.If the subwoofer will not play loud enough, AND it is connected to the SUBWOOFER OUTPUT jack on a non-THX surround sound processor:

Make sure that the "BASS LEVEL" toggle switch is set to "VARIABLE." Set the "BASS LEVEL" control to the "MAX" position. If you get bass output, but it is not enough, then the processor's output level is too low.

Some surround processors/receivers/amps have very low output levels from their SUBWOOFER OUTPUT jacks. If you do not have enough gain when using the SUBWOOFER OUTPUT jacks on a non-THX processor, use the processor's PREAMP OUTPUT jacks. See Figures 5 and 6 (page 10).

IF YOU NEED TO REPLACE THE EXTERNAL FUSE:

Unplug the subwoofer from the wall AC socket. Remove the fuse cap. Look carefully at the wire filament inside the glass. If it is broken, replace the fuse ONLY with one identical in size and value. Using a larger fuse will void your warranty AND MAY CREATE A FIRE HAZARD. Plug the subwoofer back in. If it does not work, unplug it immediately. Contact M&K or your dealer for service.

Page 14 Page 16
Image 15
Page 14 Page 16
Contents THXpowered subwoofers Wiring Diagrams Table of ContentsTHX subwooferspage Safety InstructionsOperation with THX Components Where to Place Your SubwooferConnecting the Subwoofer to a THX Controller IntroductionWiring ONE Subwoofer with a THX Controller Operation of the Bass EQ Switch THX Testing the Subwoofer THX ModeOperation of the LOW Pass Filter Switch THX Operation of the Bass Level Switch THXOperation with a NON-THX Processor Setting Subwoofer Level THXUsing TWO Subwoofers THX Operation of the LOW Pass Filter SwitchOperation of the Bass EQ Switch Operation of the Bass Level SwitchWiring with a NON-THX Processor or Preamp Use a Y-connector To connect to Two subwoofers Wiring with the M&K HP-80 or VF-80 HIGH-PASS Filters NON-THX Testing the Subwoofer NON-THX Setting the Subwoofer Level NON-THXUsing TWO Subwoofers NON-THX Phasing Test Method TWO SATELLITE/SUBWOOFER Phasing TestSpecial Note if YOU have a THX 5.1 Channel Processor Phasing Test Method ONESpecial Method for Placing the Subwoofer FINE-TUNING the Placement of Your SubwooferTroubleshooting USE of Spiked FeetIf your subwoofer has no output If YOU Need to Replace the External Fuse If you hear a persistent hum or buzz through the subwooferVolt SpecificationsCabinet Maintenance Replacement Fuse Values

MX-350THX, MX-5000THX Mk II, MX-350THX specifications

MK Sound is a renowned name in the world of high-performance audio, and their lineup, particularly the MK-5000THX Mk II and MX-350THX, showcases their commitment to innovation, precision, and immersive sound experiences. The MX-5000THX Mk II is a powerful subwoofer designed to deliver deep, rich bass that enhances any audio system, making it an ideal choice for both home theater enthusiasts and audiophiles.

Featuring advanced technology, the MX-5000THX Mk II utilizes a high-excursion 15-inch driver that creates an impressive low-frequency response down to 20 Hz. This subwoofer is THX certified, ensuring it meets rigorous standards for performance and reliability. The design approach of the MX-5000THX Mk II incorporates a dual-firing configuration, allowing it to produce a more balanced and immersive soundstage. Its robust amplifier provides 500 watts of continuous power, with dynamic peaks allowing it to deliver visceral audio that can be felt as much as heard.

In contrast, the MX-350THX is a more compact yet equally formidable subwoofer option. Its smaller 12-inch driver does not compromise performance, delivering an impressive low-end response ideal for smaller rooms or systems where space is a premium. Like its larger sibling, the MX-350THX also boasts THX certification, reflecting its ability to reproduce cinematic sound with accuracy and impact. The subwoofer is engineered with a down-firing design that aids in better integration with room acoustics, providing a smoother overall bass response.

Another standout feature across these models is the flexibility in setup options, with multiple input configurations that support various audio sources, including high-level and low-level inputs. This versatility allows users to seamlessly integrate these subwoofers into their existing home theater or music systems.

In terms of aesthetics, both the MX-5000THX Mk II and MX-350THX are designed with clean lines and a modern look, ensuring they can fit seamlessly into any room decor. With robust build quality, these units are built to withstand the rigors of home use while delivering consistent performance.

In summary, MK Sound’s MX-5000THX Mk II and MX-350THX deliver exceptional quality and performance for both casual listeners and serious audio enthusiasts. With advanced technologies, THX certification, and versatile setup options, these subwoofers represent a significant investment in sound quality, elevating any audio experience to new heights.
Top Page Image Contents