Usually a sub has an on/off powered by the antennae feed from the head unit (blue wire)

Last edited by TBM; 09/08/20 12:40 PM.

"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10