I would like to place my rack on the side wall in sted of in between the speakers. In my room this would require 7-12 meters of speaker cable. I’m a little worried after reading that the wrong cables can damage the amplifier (for some reason I think the longer the cable is - the more probable itis).
Could a which hat pahantom of 7-12 meters be harmfull to my nap 300 DR?
Also - would it be good enough sonically?
And also - out of curiosity, Naim recommends their own Naca5 - with a known spec. All specs are connected to length
Capacitance: 16pF per metre
Resistance: 9 milliohms per metre
Inductance: 1uH per metre)
Therefore I do not understand why they also recommend a spesific length. When they recommend minumum 3,5 meters of 16pF pr meter, is it not the same as recommending minimum 7 meters of 8pF pr meter? Or are these to seperate recommendations - you should have at least 3,5 meter (regardless of cable) and your cable should be 16 pF pr meter?
The Naim recommendation is not capacitance, it’s the inductance load to add stabilisation to the output stage, 3.5m is 3.5uH. Why not actually say inductance rather than length, it’s something going back years pre NACA4 when it was a specific pair of single wire RS cables loosely twisted together.
I guess it’s easier to specify a length when few cable brands actually specify the inductance.
I use 10m per channel of NACA5, which works brilliantly with my Naim amps. When I listened to various lengths, this was definitely my preference over shorter lengths, especially the minimum of 3.5m per channel.
However, how that applies to different cables of different inductance, capacitance and resistance, I couldn’t say.
The recommendation for NACA5 with its given parameters is 3.5m minimum, 5-10m optimum, 20m maximum. You are right that the meter recommendation to achieve the same inductance would differ if the speaker cables have different parameters per meter. However, the values are often not published for other cables. Braided and twisted cabled are not suitable and can indeed even damage the amp. However, Witchhat has “the Naim specialists” written large on their home page and their cables are suitable and work very well by all accounts. You will be fine with 7-12, but if in doubt, ask Witchhat.