Alfredo Guerro: Silver III Speaker Cable

“I would like to write to you to express my sincere gratitude for what your cables have done in my system.

Over time, I have installed Tellurium Q cables step by step throughout the whole chain of my equipment, and each of them has contributed something important. What began as a promising improvement gradually became something much more profound: a transformation of the entire musical presentation.

Thanks to your cables, I have finally been able to achieve in my digital system something I had long considered almost unattainable: a degree of realism, temporal continuity and musical flow that I had previously associated only with vinyl. For the first time in my life, my digital front end sounds truly believable to me, not only in terms of definition or scale, but also in terms of intimacy, coherence and naturalness.

What has impressed me most is that this was not a superficial change. It was structural. The piano changed, the orchestra changed, and above all the coherence of the sound changed. The music now flows in a way that feels natural and convincing, with a continuity that reminds me of vinyl, yet without losing the spaciousness and black background that good digital reproduction can offer.

This had been a long-standing hope of mine, one that I had almost given up on. I had reached a point where I no longer believed that digital sound could fully convince me in this way. Your cables helped me cross that final boundary.

I must also say that I never suspected phase distortion could be so relevant. Only now, after hearing the cumulative effect of addressing it throughout the entire signal path, do I understand how fundamental it is to musical realism.

So I simply wanted to thank you. Your work has allowed me to discover a level of digital playback I had never experienced before.

With gratitude and admiration.”

– Alfredo Guerro, Spain

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Richard Warren: Ultra Black II Speaker Cable

“I wanted to say that the cables did arrive in good time and I was able to register them with the clever bar code system that you have. Beyond that I also want to thank you for creating such a wonderful gift to the audio enthusiast world ! I’m not sure if your life is filled with putting out fires or if you have floods of emails with praise . I Googled your name and I see you have a lot to do with these cables I just purchased. An English friend introduced me to them and while looking at the Black II I saw the Ultra for a decent price and the size I needed ( 2.5 m). I must say I was a little bit reluctant when I read about the 50 to 100 hours of break in time. To avoid disappointment I set my expectations low; telling myself ok you may not hear a big difference but it’s coming ! I was so impressed with the sound right out of the box . I’d never heard that speaker leads can open up a sound stage but I craned my neck turning to look down the hall looking for a new instrument being played with Peter Gabriel’s song ” Red Rain” .”

– Richard Warren, USA

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2026-02-06T11:28:56+00:00Tags: |

Paul Stemp: Ultra Black Speaker Cable

“Thought I would drop you a little follow up… I have really been enjoying the Ultra Black ii rca cables… For me they have been an eye (ear) opener to what good cables can do!

I have since acquired a pair of Ultra Black ii speaker cables… again wow! These are a great step on from the [removed] I was previously using.

I have not heard my system sound so refined yet full of detail… and feel… I find myself being drawn into the music much more easily.”

– Paul Stemp, UK

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2025-06-12T15:48:45+01:00Tags: |

HiFi & Music Source: Ultra Black Speaker Cable

“Having inaugurated an awards season for 2022, it seemed appropriate to acknowledge some key pieces of HiFi equipment that have passed through HF&MS over the preceding nine years. There have been just three ‘Night and Day’ moments over this period. These experiences are usually unexpected and simply tangible, where you just think; ‘blimey, this is really really good!

I was one of those who appreciated cables were important but I had no idea how profound the introduction of a medium to high-end cable could be and the Ultra Black II is by no means Tellurium Q’s best cable.”

– Simon Wilce, HiFi & Music Source

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2025-06-12T15:46:21+01:00Tags: |

Audio Video: Ultra Black Speaker Cable

“The Ultra Black II speaker cable is good for systems where you need to improve spatial clarity. The images keep their density and their weight, the imaginary contours of virtual sources are better outlined and detailed separation of foregrounds appears. The same effect of underlined three-dimensionality of the front edge of the scene, and even with some expansion of the stereo base.

Things that for the same money help to jump into another level, are really rare.”

– Audio Video, Salonav.com

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2025-06-12T15:44:42+01:00Tags: |