What is a pre-out on a headunit?
Pre-out stands for preamplification output. They are commonly used with a subwoofer and provide aid in adding all kinds of channels to your home theatre. By using preamp output, you can consider serious upgrade options. It is a way to take your signal out from your amp before it passes through the power section.
How much power does a head unit put out?
Genuine High-Power Head Units
These radios can produce around 45 watts of power per channel using standard CTA-2006-C compliant distortion and supply voltage specifications.
What is a good FM sensitivity rating?
FM radio: Radios with a low FM sensitivity do a better job of pulling in radio signals. An FM sensitivity of 8 to 12 dBf is considered very good.