I am moving my sub to the rear of my sofa for corner loading purposes. and I either need to add an additional 18 ft cable to my existing Monster 300 cable (18 ft to 36 ft) or buy a new one. (1) Will I experience degradation in sound if I use a female to female connector and add an additional Monster 300 18 ft cable? (2) Assuming I get a new one piece 36 ft cable, is there really a sound quality difference between the following: a: Monster 300 b: Bettercables c: RG-6 coaxial d: Bluejeans cable Monster and Bettercables advertise better subwoofer sound quality and tighter bass. Alot of members on this forum just use RG-6 for extended runs. What should I do?? Thanks in advance for any advice!