MK Sound V-90, VX-4, V-2B, V-1B, MX-90 If you hear a persistent hum or buzz through the Subwoofer

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powered subwoofers

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c.Check the red LED on the Subwoofer's back panel. If the LED is not lit, check the AC fuse next to the LED. Unplug the Subwoofer before changing the fuse. See instructions on Page 15. If the element inside the fuse is broken, replace the fuse. If it blows again, contact your dealer or M&K.

d.If the red LED is still lit, try this test: Turn the "BASS LEVEL" control to "MIN". Plug a standard RCA cable into the "FROM PREAMP" jacks. Lightly touch the plug at the free end of the cable, while slowly turning the "BASS LEVEL" control clockwise. If you hear noise from the Subwoofer when you touch the cable, the Subwoofer is functioning. Look elsewhere in your system for the problem. If you hear no noise, contact your dealer or M&K.

e.Make sure that the input cables are OK. Double check your connections. If necessary, replace any defective cables or speaker wires.

2.If, after operating the woofer at high volume levels for a long time, the woofer cuts out or becomes intermittent:

Your Subwoofer has a protection circuit that protects it from overheating. After continuous operation at high volume levels, this circuit kills the power to the Subwoofer. When it activates, the sound may switch in and out rapidly, with a "fluttering" sound. If this happens, unplug the unit and let it sit for at least half an hour. After that time, plug it back in. It should operate normally. If you find this happens frequently, contact the factory for advice.

3.If you are using the "FROM AMPLIFIER" terminals, and the Subwoofer has very little output:

Make sure that the input cables are in phase. Reverse the (+) and the ( — ) connections for ONE CHANNEL ONLY at the "FROM AMPLIFIER" terminals. If the problem remains, put the cables back as they were. Then perform the test in Step 3.

3.If the midbass range (the area of transition between Subwoofer and Satellite speakers) sounds weak:

Refer to Section 4, Phasing Test, on page 9. Reverse the (+) and ( — ) connections at the back of BOTH Satellite speakers. The wiring configuration that gives the most bass is correct.

4.If you are using the "FROM PREAMP" input terminals, and you hear a thump through the Subwoofer every time you turn the system on:

Either the preamp, receiver, or surround sound processor is generating the thump, and the Subwoofer is reproducing it. To eliminate this problem, switch to the speaker wire "FROM AMPLIFIER" input terminals.

5.If you hear a persistent hum or buzz through the Subwoofer:

Because the Subwoofer reproduces the 60 Hz hum frequency, 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. Wires and cables running close to AC lines are a common source of hum. If necessary, reroute your cables.

To identify the source of hum, remove all input cables to the Subwoofer, but leave it plugged into the AC outlet. Carefully turn the "BASS LEVEL" control up towards the "MAX" position. If you hear hum coming from the Subwoofer's speaker driver, the Subwoofer is the source of the hum. If you hear no hum or less hum, the problem is

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Contents Series Table of Contents Powered subwooferspage Safety InstructionsWhere to Locate Your Subwoofer IntroductionSubwoofer HOOK-UP Standard AMPLIFIER/SPEAKER Wire Connections HIGH-LEVEL HIGH-PASS Filter Usage Satellite Speaker Wiring OptionAlso Shows USE of the V-125s HIGH-LEVEL HIGH-PASS Filter Using the Preamp Inputs RCA Jacks Wiring with a Separate AMP and Preamp RCA Jack InputsUsing AN M&K Electronic HIGH-PASS Filter Wiring with the LP-1S & VF-100 Electronic HIGH-PASS FiltersPlugging in the Subwoofer SATELLITE/SUBWOOFER Phasing TestUSE of the Filter Control Using TWO SubwoofersHome Theatre Usage FINE-TUNING Subwoofer PlacementMX-2000, MX-100, MX-90, MX-80, V-100 Special Installation NotesMX-70 TroubleshootingIf you hear a persistent hum or buzz through the Subwoofer Replacement Fuse Values If YOU Need Service

V-90, MX-70, MX-80, MX-1000, MX-2000 specifications

MK Sound is renowned for its high-performance audio products, consistently pushing the boundaries of sound technology. Among its acclaimed lineup are the VX-4, VX-7, V-1B, V-2B, and MX-100, each designed to deliver an extraordinary audio experience.

The MK Sound VX-4 is a compact yet powerful speaker that excels in various listening environments. It features a 4-inch woofer and a 1-inch tweeter, providing a broad frequency response that captures both the subtle details and the impactful lows of any audio track. The speaker’s design incorporates advanced construction techniques to minimize distortion, ensuring that every note is rendered with clarity. Its versatile mounting options make it suitable for both home and professional settings.

Moving up in the lineup, the VX-7 is designed for those who demand a bigger sound. With a larger 6.5-inch woofer and improved power handling capabilities, the VX-7 enhances the listening experience with rich bass and clear high frequencies. The speaker employs MK Sound's proprietary technology to achieve a seamless soundstage, making it ideal for multi-channel audio setups or stereo listening.

The V-1B and V-2B models are subwoofers that take low-frequency reproduction to the next level. The V-1B, featuring a 10-inch driver, is engineered to deliver punchy bass while maintaining precision. Its robust amplifier ensures powerful performance, perfect for home theater applications. The V-2B, with its dual 12-inch drivers, is designed for audiophiles seeking the ultimate bass experience. This subwoofer showcases extraordinary extension and dynamics, making it indispensable for cinema enthusiasts and music lovers alike.

Lastly, the MX-100 is MK Sound's flagship processor that brings sophisticated control to any audio system. It supports advanced audio formats and includes intuitive crossovers, ensuring seamless integration with all MK Sound speakers. The MX-100's customizable settings allow users to tailor their audio experience, maximizing both performance and enjoyment.

Overall, MK Sound’s VX-4, VX-7, V-1B, V-2B, and MX-100 embody cutting-edge technology and expert craftsmanship. Each product offers unique features designed for superior audio performance, ensuring that every listener experiences sound as it was meant to be heard. With MK Sound, quality and innovation remain at the forefront of audio reproduction.
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