I need an RCA connection cable long enough (at least 8m) to connect to my ONKYO amplifier subwoofer bass ASW4000 B & W whose location is not yet defined. After 15 m provided by the RCA cable, the monster of its 450 W fully meets the solicitation subwoofer jack on the amplifier. My choice reflects both the distance between the amplifier subwoofer but also because I have sought to avoid the antenna effect due to the length of the connection, if it was not shielded, and the input sensitivity of this type subwoofer which multiplies the breath is not neutralized by the impedance of 75 Ohms. In use amplifier / subwoofer, I recommend this RCA cable HQ of this quality (shielded 75 Ohm) can not be in the film but I have chosen for the quality of sound it reproduces.