I have run 20' MIT 350 EVO, 30' Kubala-Sosna Emotion and 30' Purist Dominus RCA cables, and 25' MIT 350 Ref and 30' NBS Statement XLR cables, and there was only one issue of noise - surprisingly the NBS Statement XLR 30' cable. This cable had a low-level hum which was only resolved when it was re-terminated to less than 20'. I suspect this had more to do with the NBS's weave design than anything else.
There was never an issue of radio-station pickup, interference or other problems due to appliances, AC units, sump pumps, etc., turning on or off in the environment, with these longer cables. The 30' RCA Dominus is an awesome cable with no problems whatsoever. There are a lot of posts on A'gon that claim you need to go balanced cabling for such long runs but my experience runs counter to this. It's all in the cable design, not its length.
Concerning what audio reviewers swear by, well, who cares! Why not try this out for yourself? The only way to know for sure which cable termination works well for any given component is to try the exact brand/model of a cable in both RCA and XLR termination. Once you change either the brand or model, the only valid test is to get that same brand/model in the other termination and listen again.
I have made several cable comparisons with many truly balanced ARC, BAT and Aesthetix electronics and with some others that have XLR connectors but which were not truly balanced designs. Each and every time, the XLR cable always outperformed the same RCA cable with truly balanced products. The most dramatic difference was the Aesthetix Io phono stage. There was a huge improvement in the protrayal of space and decays with the XLR cable. Even when I tried lower performance NBS XLR cables, these easily outperformed the much higher priced/performance Kubala-Sosna or Purist Dominus RCA cables here. But when I was able to try the K-S XLR cable, it was absolutely breathtaking. The comparison between the K-S Emotion RCA vs. XLR was quite an awakening for me with the Io. The Io simply needs to be run from its balanced outputs to do its magic.
I then did the exact same experiment with the Manley Ref DAC. This has XLR connectors but is not a truly balanced product as it uses transformers to generate the complimentary output. Here, there was barely a difference between the two terminations of the K-S Emotion cable. And this difference was most likely due to the Aesthetix Callisto line stage operating "better" with a balanced input. But unlike the case of the Io experiment, I could drop in a Dominus or K-S RCA and either of these would destroy the NBS XLR. The Manley clearly did not require the use of XLR cables to perform to a high level as did the Io. Here, the sonic strengths of the K-S and Purist shined through independent of the cable termination.
If you find an XLR cable that works well for you, it may not cost any more than the RCA equivalent. Some companies charge a little more and some do not. You have to try this all out for yourself and put your audio magazines back on the book case.
John
There was never an issue of radio-station pickup, interference or other problems due to appliances, AC units, sump pumps, etc., turning on or off in the environment, with these longer cables. The 30' RCA Dominus is an awesome cable with no problems whatsoever. There are a lot of posts on A'gon that claim you need to go balanced cabling for such long runs but my experience runs counter to this. It's all in the cable design, not its length.
Concerning what audio reviewers swear by, well, who cares! Why not try this out for yourself? The only way to know for sure which cable termination works well for any given component is to try the exact brand/model of a cable in both RCA and XLR termination. Once you change either the brand or model, the only valid test is to get that same brand/model in the other termination and listen again.
I have made several cable comparisons with many truly balanced ARC, BAT and Aesthetix electronics and with some others that have XLR connectors but which were not truly balanced designs. Each and every time, the XLR cable always outperformed the same RCA cable with truly balanced products. The most dramatic difference was the Aesthetix Io phono stage. There was a huge improvement in the protrayal of space and decays with the XLR cable. Even when I tried lower performance NBS XLR cables, these easily outperformed the much higher priced/performance Kubala-Sosna or Purist Dominus RCA cables here. But when I was able to try the K-S XLR cable, it was absolutely breathtaking. The comparison between the K-S Emotion RCA vs. XLR was quite an awakening for me with the Io. The Io simply needs to be run from its balanced outputs to do its magic.
I then did the exact same experiment with the Manley Ref DAC. This has XLR connectors but is not a truly balanced product as it uses transformers to generate the complimentary output. Here, there was barely a difference between the two terminations of the K-S Emotion cable. And this difference was most likely due to the Aesthetix Callisto line stage operating "better" with a balanced input. But unlike the case of the Io experiment, I could drop in a Dominus or K-S RCA and either of these would destroy the NBS XLR. The Manley clearly did not require the use of XLR cables to perform to a high level as did the Io. Here, the sonic strengths of the K-S and Purist shined through independent of the cable termination.
If you find an XLR cable that works well for you, it may not cost any more than the RCA equivalent. Some companies charge a little more and some do not. You have to try this all out for yourself and put your audio magazines back on the book case.
John