Talk to me about underseat subwoofers
 

I'm particularly looking at these two

• JBL Bass Pro
  
  
  
• Infinity Basslink
  

Do these little things actually give out pretty good bass or do they just vibrate your seat mostly?

A single 8 won't knock your socks off, but if it is decent quality you will definitely notice low-end in your music that wasn't there with the stock system. See if you can find reviews on either or both of those on Amazon or elsewhere online.

I know somebody that has one under both front seats and they sound pretty good. You do get mostly vibration (girls probably like it if you know what I mean) but they sound pretty decent for what they are.

Who? We need a name and contact info for verification.