Amazon Basics Digital Optical Audio Toslink Cable, 6 Feet, Black

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A: Thickness isn't too important as long as the wire is thick enough to prevent light from escaping and block interferences.

What is TOSLINK? - Definition from Techopedia

So, if your display or AV device has an optical audio connection on the rear, you'll need to see whether there's enough room for the audio cable's connector to fit.Since optical cables are perfect at recreating a signal and barely any transfer is lost in the exchange, they make exceptional solutions for generating great sound with CD players. At RS you will find a selection of high quality optical audio cables available in a wide range of lengths, colours and profiles to suit your needs. Rather than dive into an arcane description of what a ground loop is (feel free to do some advanced reading on the topic if you're curious), it's sufficient to say that a ground loop can occur in your home when there is more than one path for electricity to take to the ground. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. This means that the chance of tip breakage or misalignment are greater than with audiophile grade cables.

CNET The Audiophiliac asks the experts: Do digital audio - CNET

Due to their high attenuation of light, the effective range of plastic optical cables is limited to 5–10 m. The optical audio port, also known as TOSLINK, can be useful for connecting older sound systems or linking devices like soundbars to TVs. Toslink cables do not have interference issues because they are immune to radiofrequency and electromagnetic sound interference. Cookies collect information about your preferences and your devices and are used to make the site work as you expect it to, to understand how you interact with the site, and to show advertisements that are targeted to your interests. Instead of a light-based audio connection, it uses a traditional RCA-style cable and connections to link your devices.A light receiver on one end receives the light signal and decodes it based on the modulation of light. RCA with Coaxial: Although TOSLINK has its advantages over RCA and coaxial SPDIF cables, they’re also better than TOSLINK in certain aspects. Really, you just need a well shielded cable although it's always a good idea to keep all cable runs as short as possible in my experience. If you take a look at the fiber optic end of a connected TOSLINK cable, you'll notice a red dot beaming light back at you.