Sommer cable 300 0271 speaker cable black sheath sommer cable 300 0271 p the sommer cable 300 0271 is a tricone reg xxl instrument cable with a fat pe foam insulation which is firmly enclosed and held in place by a carbon screen this will optimise the capacitance and ensure a loss free treble reproduction even over longer distances this design and the cu mesh screen will perfectly protect against external interference the special longlife compound jacket ensures a high tread resistance