In article , Tim Martin
wrote:
10 metres is a short cable length for line-level signals.

Probably. But I would check the source o/p impedance and cable capacitance
before being sure of this. In general, domestic kit tends to be used with
shorter runs. Also check for any hum problems, particularly when the source
are destination are being powered by different mains sockets in different
rooms.

If the 'tape' outputs are unbufferred the impedance may depend on the
signal source driving the amp as well. And if the cable capacitance is too
high, this may affect the results when listening via the 'source' amp.


Slainte,

Jim

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