MK Sound V-1250THX operation manual Troubleshooting, If your subwoofer has no output

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V-1250THX subwoofer

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If you want to experiment, move the main speakers or subwoofer towards or away from your listening position, in small increments. When you hear the best combination of stereo image localization and focus with solid midbass impact and output, you have the ideal location.

If you have two subwoofers, perform one test for each subwoofer. When you perform each test, make sure the other subwoofer is not operating by either unplugging its input cable or its power cord.

8. TROUBLESHOOTING

Your subwoofer amplifier circuit provides high reliability, and, if necessary, easy modular parts replacement. This guide will help solve or diagnose most problems that may occur. Remember, if a fuse blows, you must replace it with the correct value to avoid fire hazards and to maintain the warranty.

1. If your subwoofer has no output:

a.Make sure that the subwoofer is plugged into an AC outlet.

b.If the "BASS LEVEL" switch is set to "VARIABLE", make sure that the "BASS LEVEL" control is set above the "MIN" position. Rotate it clockwise if it is set to the "MIN" position. Make sure that the SUBWOOFER OUTPUT level control on your processor or amp is set above the "MIN" position.

c.If the "BASS LEVEL" control is set to "THX", make sure that any SUBWOOFER OFF/ON switch (found on the controller front or rear panel or remote control) is set to ON. Make sure that the SUBWOOFER OUTPUT level control on your THX controller is set above the "MIN" position.

d.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.

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 your cables are OK. Re- 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, PHASING TEST, on page 13. Reverse the position of the "SUBWOOFER PHASE" switch on the back panel of the subwoofer. The switch 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:

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Contents THX Select powered subwoofer Table of Contents Wiring DiagramsSafety Instructions 1250THX subwooferpageOther SET is for USE with NON-THX Processors Where to Place Your SubwooferIntroduction Connecting the Subwoofer to a THX Controller Operation with THX ComponentsWiring ONE Subwoofer with a THX Controller Operation of the Bass Level Switch THX Testing the Subwoofer THX ModeOperation of the LOW Pass Filter Switch THX Calibrating the Subwoofer THXOperation of the LOW Pass Filter Switch Setting Subwoofer Level THXUsing TWO Subwoofers THX Operation with a NON-THX ProcessorOperation of the Bass Level Switch Wiring with a NON-THX Processor or PreampUse a Y-connector To connect to Two subwoofers Wiring with the M&K HP-80 or VF-80 HIGH-PASS Filters NON-THX Using TWO Subwoofers NON-THX Testing the Subwoofer NON-THXSetting the Subwoofer Level NON-THX Phasing Test Method TWO SATELLITE/SUBWOOFER Phasing TestPhasing Test Method ONE Troubleshooting If your subwoofer has no outputReplacement Fuse Values If YOU Need to Replace the External FuseCabinet Maintenance If YOU Need ServiceSpecifications

V-1250THX specifications

The MK Sound V-1250THX is a high-performance subwoofer that embodies the pinnacle of audio technology, specifically designed for home theaters and professional sound environments. Known for its robust power and precision, the V-1250THX is an ideal choice for those who seek to elevate their sound experience to an immersive level.

At the heart of the V-1250THX lies its powerful 12-inch driver, meticulously engineered to deliver deep, impactful bass that resonates throughout the room. This driver is coupled with a high-output amplifier, delivering a remarkable 500 watts of continuous power and peaking at 1000 watts. This impressive power aligns with THX certification standards, ensuring an audio quality that meets the needs of discerning audiophiles and movie enthusiasts alike.

One of the notable features of the MK Sound V-1250THX is its advanced bass-reflex design. This design enables the subwoofer to continuously produce low frequencies that maintain clarity and precision without distortion. The ported cabinet design further enhances this characteristic, allowing for better airflow and reducing the risk of unwanted noise.

The subwoofer is also equipped with a versatile input configuration, supporting both single-ended and balanced connections, making it compatible with a wide range of AV receivers and processors. Furthermore, the V-1250THX comes with an adjustable phase control and variable low-pass filter, giving users the ability to customize the sound output to fit their specific environments and preferences.

In terms of build quality, the V-1250THX features a sturdy enclosure that minimizes resonance and vibration, ensuring that all energy is directed towards sound production. The aesthetically pleasing finish complements various home decor styles, making it an attractive addition to any audiovisual setup.

Additionally, the subwoofer's compact size allows for flexible placement without sacrificing performance. The MK Sound V-1250THX is not just a subwoofer; it is a cornerstone of a superior audio experience built on innovation and quality craftsmanship, perfect for anyone looking to enhance their sound experience with powerful and accurate low-end reproduction.
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