Good day, I recently put together a Car-Hifi system which consists of the following components: Hertz HCP-4D (amp for the front and rear system) Coral MK165 (front and rear system) VISION EXTREME VE250 (Subwoofer) SIGNUM SE-1200 (power amplifier for the woofer) Now the question, should I install Power Caps for the amplifiers, use MDF or MPX rings, or something else important missing? Already thank you for your help in advance!