I just recently purchased a 2013 WRX Limited 5-Door. I'm interested in doing some upgrades to the audio system. I don't want to sacrifice any trunk space. Are there speakers that are capable of producing pretty good bass that can replace the stock speakers? I'm planning on getting the JVC KW-NT800HDT for my head unit.
I have the WeatherTech DigiFit Floor Mats. I don't think an under the seat sub will fit without drilling through the floor mats. That is also an option that I would like to avoid.