Monster Cable MPC ISM 201XLN Open Box

(Open Box) Monster Silencer In-Line Noise Reduction Module

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Sometimes no matter how careful you are with an installation, you get a ground loop or just enough alternator whine that you can never just listen to the music. Car audio is a tough environment and even a carefully planned install can wind up with alternator whine.The Silencer™ was specially designed to greatly reduce ground loops and alternator noise. Just plug it in-line with your current RCA cables. The propriety construction disrupts the loop between the source unit's ground and the amplifier ground resulting in a clear connection.
  • Monster Silencer In-Line Noise Reduction Module
  • Designed to greatly reduce ground loops and alternator noise
  • Plug it in-line with your current RCA cables
  • Advanced audiophile parts for a flat frequency response of 20-20kHz ±1dB
  • In-line design provides the noise-suppressing effects without removal of existing wiring
  • Features DoubleHelix technology for up to 40dB loop area noise reduction
  • XLN Xtra Low Noise technology that further prevents unwanted noises
  • Duraflex protective jacket for easy routing and installation
  • 24k gold contact connectors for improved signal transfer and corrosion resistance
  • Monster 6-Cut Turbine connectors for a tight and secure connection
  • Heavy-duty strain relief keeps the cable-to-connector link intact

Noise Filter Specifications

Noise Filter Type
This designates the type of noise filter listed.

Ground Loop Isolators are connected in-line with the RCA interconnects or other audio cables.

Power Line noise filters connect to the power line of the receiver and help reduce noise from the source.

Pop Eliminator noise filters are designed to remove the "pop" that occasionally happens in some systems when the vehicle is turned on.

Ground Loop Isolator
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.


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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Monster Cable MPC ISM 201XLN Open Box