How is my design for SPL? (Fi SSD 15)

[Jonnyswboy]

I have a Fi SSD 15 (1500RMS) and a Taramps MD3000.1

SSD Series – Recone Kit | Fi Car Audio

ficaraudio.com

I designed this box for highest SPL in the 34-39 range. Would you change anything? I am specifically wondering about port area and length. It's 5.72 gross cuft. Port displacement is 1.35 cuft.

Thanks!

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[Jonnyswboy]

WinISD: https://drive.google.com/file/d/1w3BT704YI-xcH1vC_-RD0L1d5bQTamd7/view?usp=sharing

 

[hispls 5,000+ posts]

the 34-39 range

Are you quite certain that's your peak?

 

[Jonnyswboy]

Are you quite certain that's your peak?

That's what winisd says.

 

[Jeffdachef 5,000+ posts]

That's what winisd says.

Hes talking about your vehicle resonant frequency aka vehicle acoustics/cabin gain

 

[shredder2]

Personally I'd ditch the slot and go with a properly sized adjustable aero, tuning 4-6hz under wherever your cabin peaks for Spl. Then Test... Test to find what gives best output. Configure it for your vehicle and also bear in mind power when sizing the enclosure if your shooting for #'s.
If you want it to peak lower than that cabin peak you'll lose output but gain extension the lower you tune (lower peak, more lows). My Bl-18 loved 40hz or so and peaked 47hz in my small Suv.
What vehicle?
Goals?.. SPL or daily loud and low?
Some people think loud and low is Spl whereas #'s usually require a higher tuning IME.

 

[hispls 5,000+ posts]

Hes talking about your vehicle resonant frequency

Yes, this.