Cable Review

Black Rhodium STREAM: A Power Cable, riding the wavelength

Offering the latest in high end power cables, Paul Rigby reviews Black Rhodium’s Stream

Black Rhodium has been producing cables of various types for many years and has been known for its willingness to experiment with technologies and new methods of production. Its open minded outlook has resulted in a host of excellent and well respected designs.

The Stream continues this direction. As the company stated, “During the design period, [we tested popular] power cables in several different lengths. Listening tests showed consistently that the best sound quality was obtain from cables cut to a length of 1.65m (wire length 1.68m after untwisting). This aligns very closely with the quarter wavelength of the 50 Hz mains frequency of 1.7m.”

These tests continued and the company came to the conclusion that cables in multiples of 1.7m sounded superior to lengths than those of slightly above or below. That’s why the length of this cable begins at 1.7m.

Hand built at the Black Rhodium factory in Derby, the wires in the Stream cable are insulated in silicone rubber as a nod to low dielectric loss while using thicker insulation than is usual in speaker cables, increasing the distance between conductors, reduces the magnetic field seen in each conductor wire.

RFI interference is tackled by using a very tightly braided metal screen.

Screen Shot 2017-07-20 at 18.38.36


I hooked up the cable to my phono amplifier and played the vinyl version of Connie Francis’ original pressing, Sings Bacharach and David (MGM) from 1968 in which she fronts a large orchestra. Part of the reason for selecting it is because it’s an ‘ok’ mastering and pressing. Nothing special. Not bad, mind you, but not astounding. Hence, any cable will need to work its socks off to impress me.

So does it, then? Oh, yes. And then some. Whether its the wavelength discovery mentioned above or a combination of factors, this cable provides a smooth and open midrange that allows the music to flow without any effort at all. Such is the ease and expression within the Francis vocal, that even her slightly strident crescendos are dissipated into yet more detail.

The low noise design also meant that there was an enhanced silence behind each instrument which benefited the piano, giving it a wholly articulate and even playful manner. Notes tapped and played on the right channel of the soundstage while, on the left channel, the trumpet offered a smooth yet open flow, seemingly frictionless in its presentation.

What most impressed me about the Stream happened in and around the central stereo image of this song. I’m used to a rather narrow and cramped output here. Yes, I can hear the vocal, a tapping cymbal and abrupt guitar strum but the Stream pushed the boundaries to the left and right and allowed this area to offer great amounts of detail plus a new awareness about just what was going on in this zone of the soundstage. Finally, and equally surprising, was the bowed double bass which provided a welcome and impressive resonance character rather than a dull low tone.

I then moved to CD/DAC and one of the strangest yet best dance tracks of the 90s, The Shamen (and Terence McKenna) with Re:Evolution. The vocal was both articulate but also expressive in an emotive way, displaying both texture and a revealing articulation. The backing music, meanwhile provided a clear, clean bass line that was both strong and forceful along with a midrange musicality that mixed accuracy with a foot-tapping and rather joyful output.


This cable is one of Black Rhodium’s best designs. Period. In fact, of all of the more recently released cables in its wide range, this is the best Black Rhodium cable I’ve heard in the last few years from the outfit and is one of the best power cables you can buy at the price point. A perfect addition to any high-end hi-fi chain, the Stream offers a sense of musical eloquence and fluency.


Stream UK 13A to IEC power cable 1.7m £450
Stream Schuko to IEC power cable 1.7m £450
Longer cable lengths can be supplied at £100 per metre pro rata


Tel: 01332 342233

GOOD: smooth mids, expressive lower frequencies, insight, low noise

BAD: nothing




Origin Live Sovereign turntable
Origin Live Enterprise 12” arm
Transfiguration Proteus cartridge
Leema Essentials CD player
Benchmark DAC
Icon Audio PS3 phonostage
Aesthetix Calypso pre-amp
Icon Audio MB845 Mk.II momoblock power amplifiers
Quad ESL-57 speakers [One Thing modded]
Vertex AQ & Tellurium Q cables
Harmonic Resolution Systems Noise Reduction Components
All vinyl was cleaned using an Audio Desk’s Ultrasonic Pro Vinyl Cleaner


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  • Reply
    ronnie schwartz
    22nd July 2017 at 10:28 am

    God I love the sound of cables!

  • Reply
    Simon Marsden
    22nd July 2017 at 3:43 pm

    Please help me with how a power cable can enhance a midrange

    • Reply
      Paul Rigby
      22nd July 2017 at 5:57 pm

      Hi Simon, I talked about this sort of thing in the actual review. Essentially by lowering various types of noise.

  • Reply
    Simon Marsden
    23rd July 2017 at 5:21 pm

    I must admit I’m a sceptic, do you have a shop or anything Paul? I am local to you, I would love a demo on some of these things.

    • Reply
      Paul Rigby
      23rd July 2017 at 5:34 pm

      Good, I’m glad you are a sceptic. I’m also happy to see that you have a mind that is open enough to want to test the things yourself, to make your own mind up and not just follow the naysaying sheep on social media 🙂 Or me, for that matter. I too was a sceptic and thought the whole thing was extremely dubious. I’m the fortunate position, though, to be able to request any hardware I fancy on loan to give a wide series of tests to the things. That’s how I decided that cables were just another component. To be treated like anything else in a hi-fi system. Most people, unfortunately, cannot do that and I respect that restriction.
      And, no, I’m just a lowly journalist. Not a retailer. Sorry. I would recommend that you talk to a local dealer and explain your situation and what your aims are. Most will be extremely sympathetic and helpful.
      Don’t forget, as there are good and bad turntables and CD players and the like, there are good and bad cables. So, if you hear poor cables, please don’t tar the entire cable genre in the same way. I remember doing a cable group test for HiFi World and, out of the nine cables I tested, I only liked two of them.

  • Reply
    29th October 2017 at 1:54 am

    So you never hooked it to a power amp? Did I miss something?

    • Reply
      Paul Rigby
      29th October 2017 at 8:22 am

      I tried the cable on a range of equipment but only highlighted those in the review to prevent too much repetition in terms of performance results text. You can be assured that power amp performance was similar in terms of sonic results.

  • Reply
    10th June 2018 at 4:37 pm

    Hi Paul: Nice sound quality interpretations. I see (from the previous comments) there remains folk who simply don’t “Get it” !
    And for that matter , nor do many of the manufacturer’s themselves -as to what exactly accounts for obvious, clear, easy-to-identify SQ distinctions between AC power cables ! (lol -but true).

    Personally, I note a very basic (i.e. cheap IEC) connector used on this power cable ? Since connectors (Plug/Wall and IEC) account for much of the price of power cables, I’m left wondering what accounts for the high price of these power cords ? (Priced at L/Euro $500 ($600-$700 US/CAN) is a quite a chunk of change.
    It was also NOT revealed the ampacity rating of this power cable: 5A, 10A, 15A ?

    For a manufacturer (or reviewer) not disclose this most basic specification is dubious itself.
    Are we (readers/users) to simply believe it can be used safely for 15A (or 10A) power transfer ?
    Or, will this information cost us another L$100 ? (lol)

    At this price point, it’s only sensible to investigate every single (simple) aspect of cable performance/ specifications -and disclose to the reader/consumer. That manufacturer’s get away with non-disclosure (as it relates to ampacity/safety) or product details that could account for such a high price is something that has plagued this industry since 2005.
    Consumer’s should be more demanding. And so too, reviewers.

    peter jasz

    • Reply
      Paul Rigby
      10th June 2018 at 8:31 pm

      I can add that info now, sure. It’s a 13A fuse, Peter using a Permaplug which Black Rhodium utilise on a regular basis.

      • Reply
        Peter Treindl
        9th September 2020 at 7:24 pm

        Can I using the river power cabel with roksan blak amplifier?

        • Reply
          Paul Rigby
          10th September 2020 at 9:45 am

          Hi Peter – in theory, yes but I have absolutely no experience with the brand, I’m afraid.

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