1994 ls400. 88k miles. Garage kept. Never saw rain or snow. Never a passenger in the rear seat. The drivers seat has 0 creases in the leather. Everything works except for the power antenna. I had the dash capacitor replaced and dash lights are perfect. My only issue has been the antenna keeps breaking. I do want to replace the speakers due to age. I would like to put an amplifier while keeping the stock pioneer radio. I use an fm modulator to play pandora and hands free Bluetooth. Anyone have success with an amp and subwoofer amp/speaker upgrade?