Mini stereo jack extension 10m. I put the noisy turn my PC in another room. The extension I use to connect the PC to a 2.1 multimedia system, or connect headphones. No bad contact. I have not perceived degradation of sound, but my listening system is not very accurate (a Altec lancing 2100 10 years), perhaps a user of powered speakers premium could better assess me on that side. For me, no problem.