Hey i was just wondering if anyone can help me with my car audio system. I have two 6'5 soundstream 2-way speakers in the back facing up along with 6'9 sony xplodes facing up at the back also. My sub is 1600 watt vibe black air built in amp it also in the back boot facing backwards. So all my sound is coming from the back i want to know the best settings for my speakers so they are loud, bassy, clear and not screamy and pitchy or to low and dull. I have a small peugeot 306 hatchback. My headunit is a pioneer dont know exact brand but the main setting i want to know as i have no clue is -hpf setting -sla -loudness off/low/mid/hi -sub w ctrl And EQ settings i currently have it on 80hz+0 250hz+2 800hz+4 2,5khz+4 8khz+2