12" Fi Q Question

[tooshort_128 10+ year member]

I know Fi recommends 1.5 cubes max for a sealed enclosure for this sub, but has anyone put one in a bigger sealed box? I'm probably going to go the sealed route because of space limitations but was wondering if a slightly bigger than recommended box would help or hurt the situation. It's got the BP option and will see about 1200rms.

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[Buck 5,000+ posts]

Why would you want to go bigger? And why would you want to go sealed?

 

[tooshort_128 10+ year member]

As stated in the first post, I'm looking into going sealed to save space in my trunk of my car. I was thinking that by making the box slightly bigger, it would help offset some of the decrease in output.

 

[bass_lover1 10+ year member]

As stated in the first post, I'm looking into going sealed to save space in my trunk of my car. I was thinking that by making the box slightly bigger, it would help offset some of the decrease in output.

You would end up with a bloated low end, and a decrease in mechanical power handling at lower frequencies.

I'm pretty sure, but it's just a guess, that the manufacturer recommends those sizes for a reason.

 

[Diplexers 10+ year member]

Sealed sounds great, bigger sealed isn't going to help; its going to hurt. Personally I would go 1.25 cu, but its your build so get some more opinions before making any final decisions.

 

[tooshort_128 10+ year member]

I've heard 1.2-1.3 cubes is ideal. Is the low end pretty noticeable?

 

[buggsson 10+ year member]

My calc. software found on the web somewhere, says approx. 1.1 for a 0.707 box (F3=43.55), and 0.75 for a 0.8 box (F3=44.21). Have not a clue as to where you would land with 1.5 ft^3.

 

[vipervin 10+ year member]

Bigger sealed will hurt, just go with the recommended.