There should be no "sonic degradation" due to the resistance of that wire run.
It is a simple question of the resistance of the wire.
The resistance of that wire run might be sufficient to crate a slight voltage drop.
That would mean a VERY small drop in volume compared to a run with less resistance, which would require you to turn up the volume a tiny bit to compensate.
In theory, since bass usually requires more current, there might be more of an effect on bass than other frequencies, but I doubt if the difference would actually be audible.
One thing to be careful about, though, is how you connected one run to the other. The wires should be soldered, to avoid a poor connection due to oxidation later on.
It is a simple question of the resistance of the wire.
The resistance of that wire run might be sufficient to crate a slight voltage drop.
That would mean a VERY small drop in volume compared to a run with less resistance, which would require you to turn up the volume a tiny bit to compensate.
In theory, since bass usually requires more current, there might be more of an effect on bass than other frequencies, but I doubt if the difference would actually be audible.
One thing to be careful about, though, is how you connected one run to the other. The wires should be soldered, to avoid a poor connection due to oxidation later on.
