Interconnect length

I have a new Rega P1 coming in the mail. To hook it up to my system, I will probably need more interconnect length, so I will use an additional 3m interconnect (a decent one) to connect the P1 to my Rega Fono pre. So my question is: is this total length (3m plus the length of the interconnect that is part of the P1) too long, and will it significantly and negatively impact the sound?