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Optimize your powered sub's performance with Monster Cable's MonsterBass™ 300. This quality cable uses a balanced, solid-core conductor and 100% foil shielding to transfer your subwoofer's ultra-low frequencies free of distortion and noise. You'll enjoy increased power, wider dynamic range, greater accuracy, and deeper, tighter bass.

MonsterBass 300 cables feature a paintable Navajo White Duraflex® jacket for durability. The 24k gold-plated Turbine® RCA connectors have a split-pin design, ensuring solid, corrosion-free contact.

MonsterBass 300 is a mono cable.


  • optimized for high-performance bass
  • balanced, solid-core conductor
  • 100% foil shielding
  • Duraflex protective jacket
  • mono cable
  • gold-plated Turbine RCA connectors with split-pin design
  • lifetime warranty

Monster Cable MonsterBass 300 Reviews

Average Customer Review:

2 Reviews

THX sub woofer cable

Written by: John from Michigan on February 19, 2008

Crutchfield Customer Review (What's this?)

I was reluctant to pay a high(?) price for a cable but this took care of my subwoofer hum that would appear randomly even when the receiver was off. This shielded cable got rid of the interference.



Best Cables in the World!

Written by: Rob from Peekskill, New York on January 27, 2008

Crutchfield Customer Review (What's this?)

I have been buying Monster Cables for years now, When I recently moved I needed a extra long Subwoofer cable, No one in my area had this cable except one store and they wanted alot more money. I ordered it from Crutchfield and received it within a few days! I must say that this cable loses no signal whatsoever.

Thanks again Crutchfield!

p.s. They have the best techs in the business and can answer any questions!



Hands-on research

What's in the box?

  • 40.3' Mono RCA subwoofer interconnect cable

Product Research


Overview: Designed specifically to maximize subwoofer performance, this MonsterBass 300 Subwoofer cable delivers improved subwoofer sound over ordinary audio interconnects. The MB300 features a special solid core bass conductor which delivers bass that's deep and powerful, while maintaining optimum clarity.

Six Cut Turbine Design RCA Connectors: Precision machined 24K gold contact connectors provide a heavy-mass connection for maximum signal transfer and superior installation integrity.

Center Pin: The cable has a 24K gold contact split-tip center pin which provides greater contact pressure for lower distortion and better signal transfer.

Directional Arrow: The directional arrow indicates the direction of signal flow. The cable shield is grounded at the source so that induced noise does not travel to the next component.

Duraflex Protective Jacket: The Duraflex protective jacket is flexible for easy routing and installation. Additionally, the jacket is resistant to temperature extremes.

100% Foil Shield: The 100% foil shield rejects EM (electromagnetic) and RF (radio frequency) interference that causes buzz and hum.

Balanced Conductors: The balanced conductors deliver wider dynamic range and more natural music reproduction.

Solid Core Bass Conductor: The solid core bass conductor ensures delicate low frequency signals are transferred with precision. As a result, bass is deeper and tighter, and sound effects are more realistic.

Silver Content Solder Joints: These high-conductivity connections accurately transfer low-level signals.

Cable Length Note: The package states that the length of the cable is 36'. The actual length of the cable is 40' 3" which is approximately 12 meters.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.