That space you have right there by your ski pass looks perfect for a single 15 or dual 12 SQLs sealed. All you need is around 10" depth and go as wide and tall as you can. Just remember those SQLs require some power to make them jump.
I went with 1.1 to play as low as possible too. I completely get trying to get low. Mine are crossed @60hz cuz in my car I get nothing above that from my trunk. Then the front sub takes over from 65hz. Kinda like an infinite baffle set up too.I know 1.1 is about that sweet spot but I kind of wanted the ability to go ported without building a whole new box if that was something I wanted to try. Back in the early 90s I ran a JL 12w4 in a 2cf sealed box (2x recommended size) and LOVED the way it sounded. The key with a bigger sealed box is to know the benefits & drawbacks. Power handling will decrease but you gain efficiency & low end extension (much like IB which is essentially a large sealed box, right?). This sub is also recommended for IB so there should be no reason a 1.5 or even 2-3cf should be detrimental. You just have to know the limitations. I know I’ll never be putting more than 500-550 (I think my PDX birth sheet says 540-something) so it should be just fine.
I’m not saying you’re implying it won’t be, I’m just explaining my thought process.
That's a nice looking trunk. 👌 good job.Ok… the ol Good News, Bad News situation is in effect and since nobody eats their ice cream before their Brussels sprouts…
Bad News:
While it’s somewhat good that the trim panel is done, it is NOT to my satisfaction and it will get redone. Somehow even after measuring twice (more than twice actually) and cutting once, the opening around the sub is not symmetrical. Somehow it’s 1/2” closer on the right vs the left. There’s also a gap on the right side of the amps. The opening around the sub was taken from the shape of the license plate recess on the trunk lid.
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Now for the Good News:
While the trim panel was being F’ed up I was busy getting some seat time with the laptop/DSP. I remeasured my speaker distances as well as experimented with a few different crossover settings. After A/Bing with my original baseline tune & constantly noting improvements, I think I have a new baseline I’m proud of. I think I was running into some weird phase issues at the previous mid/tweeter crossover points. Knowing the SI 3s are good full-rangers I upped the crossovers to 7k & that seems to be the sweet spot. I have a good center image, fairly wide stage, good tonality & the bass is almost up front. I still think I can get that better so I’ll keep working at it when I get time. Also in other good news, I figured out how to get the fuel filler door off so that will be taken care of this week.
If you didn't already know. 2 SQLs are my favorite 😍. Just give them enough juice.It does. I’ll be honest, I REALLY wanted to get new amps. Who doesn’t like getting shiny new toys? But the more I thought about it I would have to redo the install plus (more than likely) a re-tune. It just seemed like a lot of hassle. I’m absolutely in love with how the car sounds with even my basic tune so after a LOT of mental anguish today I figured why mess with it.
I already messaged the guy about the amp and after the swap I’ll open the current one up and see what I find. If it’s fixable I’ll take care of that and maybe keep it in the possibility I get a 2nd SQL & it’ll replace the F4.