Optical connections are the most common type of digital audio hookup on today's gear. Monster Cable® 400dfo optical cables ensure that you'll hear every bit of performance from your CD/DVD player or cable/satellite receiver.

Each 400dfo cable has a specially tuned optical fiber and precision polished fiber terminations to minimize internal reflections and signal dispersion. This provides more accurate signal transfer for sound that's more detailed and dynamic. Monster's InsuLight™ jacket helps minimize time distortion caused by digital "jitter" — a common problem with poorly constructed optical cables.

Since an optical cable carries signals as pulses of light rather than as a stream of electrons, it is virtually impervious to magnetic or electrical interference.

Product Highlights:

  • precision-polished fiber terminations
  • InsuLight™ inner jacket
  • specially tuned optical fiber for low dispersion
  • heavy-duty molded Toslink connectors
  • heavy-duty strain relief prevents fiber and connector damage
  • warranty: lifetime
  • Our 60-day money-back guarantee

Monster Cable 400dfo Reviews

Average Customer Review:

23 reviews
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Monster Cable 400dfo

Written By Chris B., Valencia, California on Sunday, June 21, 2015

Crutchfield Customer Review (What's this?)

Great Fiber Optic Cable. Excellent Build Quality. Solid Terminations on each end.

Pros: High Quality. Good Value.

Cons: None.

Great roduct

Written By Anonymous, Penna on Tuesday, December 09, 2014

Crutchfield Customer Review (What's this?)

Big step up from the cable provided with the unit we purchased. Superior quality, durability, sound quality are evident.

Monster Cable 400dfo

Written By MGM, SEATTLE AREA on Friday, April 04, 2014

Crutchfield Customer Review (What's this?)

YEP there cables ! work great..what would you expect

Pros: they work great

Cons: none

Monster cable 400dfo

Written By Anonymous, Weslaco, Texas on Wednesday, February 26, 2014

Crutchfield Customer Review (What's this?)

The Monster Cables dfo are Awesome Cables!! It was so easy to install them. I am astonished with performance I am getting from these cables!!

Pros: So easy to install. And you will automatically notice the difference!

Cons: None

Monster Cable 400dfo

Written By Ron, North Forkk, Ca on Thursday, January 16, 2014

Crutchfield Customer Review (What's this?)

Cables work great for the television and DVD.

Pros: They work

Cons: None

Monster Cable, 400 dfo, Digital Optical Cable

Written By James E., Silver Spring, Md on Tuesday, December 24, 2013

Crutchfield Customer Review (What's this?)

Excellent quality digital optical cable. I have used other brands and they do not provide the same quality, durability, and warranty. Although Monster cable costs a little more it is well worth the difference.

Pros: Great quality, durability, and warranty.

Cons: none

Monster Cable 400dfo

Written By john w., lynchburg va on Saturday, December 07, 2013

Crutchfield Customer Review (What's this?)

great product ,great sound

This Monster Cable works for me!

Written By BUBS, Charlottesville, VA on Saturday, November 16, 2013

Each time I wanted to browse the web on my Smart TV, to get sound I had to go to "tools" and switch from the external or surround speakers to the TV speakers and do a few other volume manipulations. If I was already on the web, "tools" wasn't accessible and I had to go back to the TV setting and start all over. And this became annoying. Eric Huffman suggested using this monster cable to hook up from the TV's digital output to the appropriate digital input jack on my "older" receiver and then changing the input on the front of the receiver. Now listening to all Smart TV applications through surround sound is a reality, sounds great, and is easily accessible!! Plus, this option was a lot cheaper than having to buy a new receiver!

Pros: Inexpensive way to get great surround sound when web browsing through an older receiver.

Cons: None

Monster Cable 400dfo

Written By NASVA, Harrisonburg, VA on Thursday, August 01, 2013

Cable provides excellent sound quality in our new home theater.

Connections too short for ZVOX 555/LG42LH55

Written By Bad Ankle Bill, Cazenovia, NY on Tuesday, July 09, 2013

Crutchfield Customer Review (What's this?)

I rate 1 star as I can't rate no star! Was ready to send ZVOX555 sound bar back as didn't seem to work. While talking with Crutchfield tech, I pushed connectors in and got sound. Tech said connectors too short, so I returned for full refund (no problems).

Pros: didn't work for my application

Cons: didn't work for my application

good quality, difficult fit.

Written By DWS, Hammond, LA on Saturday, July 06, 2013

Crutchfield Customer Review (What's this?)

As usual, good quality from Monster. Crutchfield advisor was very helpful finding and recommending what I needed. Product arrived VERY quickly. The only complaint is the cable doesn't fit the sockets securely and sometimes must be pushed back in to function properly. It's used to connect a T.V. to a soundbar, so the components may be the problem, not the cable . This is the only reason it didn't get five stars. Crutchfield help and service, five stars!

Pros: Good quality. Reasonable price for the quality. Good advice from Crutchfield.

Cons: Didn't want to fit component sockets securely. Not necessarily a problem with the cable.

Monster digital audio cable

Written By Steve, Baltimore on Friday, May 24, 2013

Crutchfield Customer Review (What's this?)

Good cable. No complaints but just began using. I have confidence that the Crutchfield team pointed me in the right direction for my needs

Monster Cable 400dfo

Written By HowardH, Barrington,RI on Wednesday, May 15, 2013

Crutchfield Customer Review (What's this?)

Bose surround sound system never sounded better than with this cable attached....thanks to tech adviser for his recommendation,,,,

Pros: up scale cord

Cons: none

Monster Cable 400dfo

Written By skifishvail, Vail, CO on Thursday, April 25, 2013

Crutchfield Customer Review (What's this?)

High end cable!

Monster Cable 400dfo

Written By Snus, Mount Airy, MD on Wednesday, April 24, 2013

Crutchfield Customer Review (What's this?)

PERFECT, from the Crutchfield guys to the shipping company. Thank You.

Excellent Quality, Excellent Sound, Expensive

Written By Lokki, Dallas TX on Wednesday, April 03, 2013

Crutchfield Customer Review (What's this?)

It's hard (almost impossible) to find anything to complain about in the quality of a Monster Cable product, and their TOSLink optical digital audio cable upholds that reputation nicely. Very well made, and produces excellent sound, as a digital transfer cable should. Realistically, there are going to be much -much- cheaper products that will produce the same sound - hey - that's the point of digital loss-less transfer, right? So, you should acknowledge that this is a bit of a vanity purchase. Having said that, it is totally hassle-free, with good-fitting connectors, and it -looks expensive- too. These facts make this cable worth its price only if it is to be used on your high-end equipment where you are striving for not only the best sound, but to show everyone that admires your system that you have made every effort to achieve the finest quality in equipment as well as sound. If you are just going to hook these up where they'll be invisible, you may be spending extra money unnecessarily

Pros: You won't achieve better sound from any other optical digital audio cable and their quality means they will be hassle-free to install, and beautiful to look at.

Cons: They are awfully expensive and there are cheaper alternatives that will be functionally equivalent. This cost them one star in the review. Functionally, they're five star all the way


Written By Trevor, Grand junction, co on Saturday, June 30, 2012

Crutchfield Customer Review (What's this?)

Monster made all the difference in the world. It made great Polk sound system Much better. I would say if you want great sound get a Monster.pl

Pros: Supper sound improvement , only way to go if you want to really enjoy our sound system

Cons: Kind of expensive, but worth every bit of it.

Never a complaint with Monster!!

Written By GabeS, Raton, NM on Thursday, August 04, 2011

Crutchfield Customer Review (What's this?)

I have been using Monster Cable products now for 15+ years and I have yet to find any of their analog or digital cables that have failed. Even under any sort of application (home or vehicle audio) or abuse. GREAT PRODUCT!!

Monster Cable 400dfo

Written By DougJ, Jacksonville, N.C. on Saturday, February 12, 2011

Crutchfield Customer Review (What's this?)

Excellent quality.

Wrong cables!

Written By Anonymous, Lincolnton NC on Monday, January 31, 2011

Crutchfield Customer Review (What's this?)

Sold as compatible with Nuforce headphone AMP. Will not fit

Good Cable, Good Length

Written By Mike C, APO Vaihingen, Germany on Friday, October 08, 2010

Crutchfield Customer Review (What's this?)

Good cable at a hard to find length (4 meters). I bought this cable for my Gaming system, so the length was perfect for it. And of course you get quality construction that comes with all Monster cables. I would like to have seen the HexMesh-Protective Jacket around the cable like most of my Monster cables have but a good cable none the less.

Monster Cable 400dfo

Written By richard, new york on Tuesday, September 07, 2010

Crutchfield Customer Review (What's this?)

great product ,great sound

It works!

Written By JV, Lancaster, PA on Tuesday, April 07, 2009

Crutchfield Customer Review (What's this?)

My older receiver lacks DVI inputs so I opted for the optical input. Everything works just fine. I like the construction of Monster Cables and usually use them over cheaper products.

Hands-on research

What's in the box?

Download owner's manual

  • 3.28' (1m) Digital fiber optical cable (toslink connector on each end)
  • "Information to consumers in application of EU WEEE Directive 96/2002" note

Product Research


Overview: The Monster 400DFO Digital Optical Cable features specially tuned fiber and precision polished fiber terminations to minimize internal reflections and signal dispersion for more accurate signal transfer and smooth, natural sound. An advanced InsuLight jacket further minimizes digital jitter and time distortion. And because the bitstream is transferred optically, there are no annoying buzzes and hums, just great digital sound.

InsuLight Jacket: InsuLight inner jacket reduces digital jitter and time distortion for more accurate audio reproduction.

Specially Tuned Optical Fiber: Specially tuned optical fiber for low dispersion and higher fidelity.

Polished Fiber Terminations: Precision-polished fiber terminations minimize internal reflections for improved digital signal transfer.

Heavy Duty Molded Connectors: For long-lasting durability and performance.

Heavy-Duty Strain Relief: Heavy-duty strain relief prevents fiber and connector damage during cable installation or removal.

Rubber Grip Connector: O ring rubber grip allows easy connector handling.

Duraflex Protective Jacket: Flexible for easy routing and installation. Resistant to abrasions and temperature extremes.

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.