United States

Speaker Cables

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  • Available with Banana or Spade connectors

    All Tellurium Q Speaker cables can be Bi-wired. If this an option you would like, please contact us directly for further information.

User Comments

"When I first decided to write to you about your Black Diamond Cables (bi-wired speaker and XLR interconnect) I had accumulated about 100 hours of listening time, but held off because the sound quality kept on improving. Even now after about 300 hours, it’s amazing and hard to believe, the sound keeps improving getting richer, lusher and more resolute as the hours accumulate.

My B&W 802D’s have never been happier, responding much faster than ever before!

I would like to thank you and the design team in Langport for doing such a great job developing the Black Diamond series of cables. Your attention to detail and pushing the state-of-the-art is greatly appreciated!

Good cables do matter!!!!

Thank you"

Jim Rooney, Boston, Massachusetts, USA

As our first overseas client said of these when they changed them for the Graphite speaker cables:

“The cables have arrived and they are simply fantastic!!! More inner resolution and the same time smoooother which is very hard to do in high end. The bass has also more control and the same time better integrated with the rest and all this without burn in!!! Great work !!!”

“It is true, these cables are finally perfect. I can connect it to the 15000,-€ Ayon Gyrfalcon or use with the 2000,-€ Amphion Argon 3 and with both I hear the the cables harmonise perfectly with the speakers and shows the strengths of both designs. For me it is no way now to use any other cable for my demos !!”
- Tibor Szegedi, Hungary

Black Diamond Speaker Cable

While the Graphites sound incredible in most systems there were a few that reported that they actually sounded “wrong”, a little thick and heavy. This only occurred on very few systems but gave us something new to launch into researching. (We love a challenge because no matter what else we always learn something new).

During our research we played with a few new material mixes (one being a specific mix of Tellurium Copper for the connectors). Other things we altered …… well we are known for not commenting on the construction, materials and manufacture processes (see our pdf, "Why No Tech Specs") but the result was something a lot more compatible but also with a performance that surprised us and meant we had a new reference level cable.

Although the Graphite and Black Diamond look identical (except for the silver name), when you hear for yourself the Graphite against the new Black Diamonds you will be in no doubt which is which and why we had to release this product - our best work. We are so excited!!! The Graphite speaker cable was referred to as “the best speaker cables I've ever heard” by one reviewer and the Black Diamonds leave our fantastic Graphite range a long way behind in terms of performance and compatibility.

Performance Profile

Click to enlarge

Where does this cable's performance belong in the Tellurium Q families of sound?


Colours Highly Recommended globe_2014 high_fidelity_award HiFi World 5 Globe Winner


6 Moons, 2016
“The obvious danger is that the ambitious audiophile will soon want to recable the entire system with Tellurium Q Black Diamond…..Such cables really are the stuff recommendations to close friends are made of”
- Frank Hakopians

AV Premium, 2015
"In short, we face the best audio cables High End to be found in our country if we stick strictly to the quality/price. A real discovery"
- Salvador Dangla, AV Premium

Mono & Stereo, 2015
“The Tellurium Q Black Diamond speaker cables` ability to retain drama and at the same time exhibit utmost transparency was demonstrated in a strikingly impressive manner. The xylophone sounds extended almost forever (so to speak) and were sharply projected on the virtual soundstage. It was exciting to “observe” (hear) tones forming in front of me with all the right natural colors/timbres and then slowly fading away. There was lots of air around the instruments and their separation was exemplary. The micro dynamic ability of the Tellurium Q Black Diamond speaker cables was breathtakingly good and great micro dynamic responsiveness is the main reason why some systems sound incredibly vivid and lifelike.”
- monoandstereo.com

HiFi Pig 2015
"Recommended for being probably the last cable you will need to buy. Stunning performance."
- Dominic Marsh, HiFi Pig 2015

Tony Bolton, HiFi World
"... reviewing the Tellurium Q Black Diamond speaker cable. Up to this point I had not found any cable over the last decade that had outperformed the Philosophy Cables loom that had been in situ. Until now. "
- Tony Bolton, Opinion Column HiFi World 2015

Product of the Year 2014
"But perhaps their reticence is understandable when the product sounds as good as this – after all, why let others in on the secret? Used in a variety of systems the Black Diamonds consistently revealed a wider perceived bandwidth, bigger soundstage and the ability to present transient details in an effortless fashion"
- HiFi World, Awards Edition Jan 2015

Diamonds Are Forever
“In short, I can honestly say the Tellurium Q Black Diamond interconnects and speaker cable are the very best leads that I have ever had in my system.”
- Tony Bolton, HiFi World , FEB 2014 edition

“Their tonal balance is perfect.”
- Wojciech Pacula, highfidelity.pl