I want a low cost subwoofer, 300+ watts, installed. Can you give me a, "no more than", cost to both buy it and install it there?

Hi Michael - In using a single 10” subwoofer from JL Audio, a Kenwood amplifier, wiring, adapters, etc., the cost would be around the $880 mark. If there is a different subwoofer/amplifier desired, we can adjust the quote accordingly. For more information, please give our Car Audio Department a call: 215-368-8343

If you're talkin a 300 + watt subwoofer then you might as well go to Best Buy because this place only sells very high-end car stereo equipment and you will pay $1 a watt for a 1000 watt amplifier. That being said Just remember this, U GET WHAT U PAY FOR. You either want cheap or you want a real sound system,,,, I will let you decide. Subwoofers should be no lower than 500 watt RMS and 1000 watt peak

Can't give that answer because it's going to depend on what subwoofers you get and how much their installation fees are. Contact them personally to get your answer. Thank you.