Завтра отсканю мануал по Jamo Concert V

В нем сказано следующее:
Speaker Cables
The CONCERT V speaker system is supported without connection cable.
In order to realize best possible sound reproduction, you are advised to select speaker cables for your CONCERT V's with care, following these guidelines:
*Use only audio grade cables which have been developed especially for speaker connection
*Keep the cables as short as possible.
*For longer runs than 5 m, use cables with max. 2.5mm^2 conductors, minimum