Hi there I just joined because I recently installed my first system and when I got it metered it did better than I thought and the guy thought I'd do pretty good at a SPL comp coming up so now I need help advice so I can hopefully increase my SPL.
So what I've got is a Pioneer DEH-7800MP+Alpine SWR 1243D+Kenwood KAC-7204 amp+Power Acoustik 2 farad cap. I've got it installed in a vented box that I made myself which is about 2.2 cubic feet tuned to 33htz and its wired with 6gauge wire with inline fuse. I built this to be a bumpin system but I want good sound quality otherwise I'd have tuned the box higher. It does have the sound quality I want but I got curious of how much SPL I had after somebody I work with thought his was louder so I showed him mine he no longer talks **** and actually told me about a local comp he thought I should check out.
Anyways I went down to the place that holds this comp to get it tested out of curiosity the other day and I hit 137.0 with windows up and 150.0 at the port. I knew it had to be decent when he said holy f*** when he was metering the port. He complimented my box and said 150 at the port is pretty good considering he had 4 15s and hit 156. I was happy to hear that from a pro installer and he told me they had a comp on June 17th and I'd do good under the small cone area category and would probably place top 3. I didn't really plan on entering comps I was more looking more for SQ but now it sounds like a good idea.
I'm pretty sure I can hit higher with some adjustments on my amp's bass boost which is fixed at 50 htz or by changing some of the EQ settings on my deck. From what I've heard 80htz is where you usually hit higher SPL numbers but I'm wondering if that varies with different subs. My EQ has 16 bands 5 are bass freqs 20-31.5-50-80-125. I have the 20htz down as low as it can cuz my sub isn't responsive under 23htz. With my box tuned to 33htz I'm thinking maybe I should turn the 31.5htz down a little too since from what I understand hitting lower freqs than your tune freq is can damage your sub. I have the LPF set to 160htz I'm thinking I should go lower to like 125 or 100. I know I need to adjust my settings on my amp or sub or maybe both but I'd like to know the best way to do that to get higher numbers without distorting it should I adjust both sub and amp or one or the other more?
I think I have a pretty good idea of what to do but I'm not totally sure and if I'm wrong about something I'd like to know so I can correct it. I was also thinking of putting polyfill in there will that help SPL or hurt it? I'm thinking it probably won't hurt it but I'm somewhat new to this so any advice would be appreciated.
I know getting a better amp would be the best way to help me with this but I don't know if I'll be able to afford it right now so if you can help me work with what I have the best I can thats what I'm looking to do for now. Any feedback would be greatly appreciated I think I detailed everything pretty good but if I left anything out that you need to know let me know. Thanks for your time hope you guys can help...