No shame in not wanting to run active. Is always an option as you get more discerning tastes. I have not rode in a Scion, but could guess there is road noise present. Unfortunately, usually in the midbass frequency range. Making weak midbass disappear all together when driving. In a perfect acoustical environment you would not need the boosted midbass, but a car is far from. One option to lowering the noise floor is block the inner body channels/cavity's the sound is travelling up through into the cabin from the road. The base of the a-piller and door runners are a good place to start. Treat the doors too of course. As far as more edge/crunch sound from the guitar, you need to work on tuning what you have first. Very little of that detail is in the midbass range.