couple quick type r questions and then some

[Nico Koutouzis 10+ year member]

Hey guys I have a custom box that is going to be built and I have already calculated everything out and the box is 1.48-1.5 cubes. This is without sub displacement. The chambers will not be separated for 2 alpine type r 10's.

1.) Would it be better for it to be a minimum company spec ported box or a close to maximum sealed box? (Both by Alpine standards)

2.) Should I fire them into the cabin or the trunk? The seats will be folded down most of the time as I only drive myself and a passenger usually (coupe). The subs would not be completely sealed from the trunk, but there will be no holes between the cabin and the trunk, meaning that other than the box edges there will be no air/ waves entering the trunk if fired into the cabin.

Misc Questions:

1) If I have my head unit video output going into three separate monitors (visor and two headrests) should I get a video line driver for the signal since its going to be divided by three instead of the intended one?

2) The avh-4300 only has an 3.5mm jack as output for audio. Can I run this into a car headphone transmitter through a converter cable that converts from the 3.5 to rca? Will this be enough power for the transmitter to get clear sound in the headphones? This rca cable will not be split. It is a one way one set of rca's that go directly to the transmitter. (the headphones are run by batteries so technically they are amplified already so they just need a signal)

LASTLY, does anyone know of a good pair of car headphones with a transmitter for lets say 50 bucks or less?

Thanks for all the help.

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[itsblown 10+ year member]

Fire into the trunk

Weather as to go sealed or ported that really depends on what your going for, spl or sq

cant help you on the other stuff

 

[Nico Koutouzis 10+ year member]

any other opinions?

 

---------- Post added at 06:01 AM ---------- Previous post was at 06:00 AM ----------

 

btw im going for kinda sound quality with a good thump to it.

 

[THATpurpleKUSH 5,000+ posts]

What kind of vehicle is it? You can fire both ways, at the trunk lid or into the cabin. If you fire into the cabin, you should seal off the trunk from the cabin to avoid sound waves resonating into the trunk giving you cancellation issues. If you fire at the trunk lid, make sure there is some room around the box to let the sound waves travel into the cabin.

You dont always have to follow manufacturer specs for the box. They go with certain sizes to minimize warranty claims or to allow use in a wide variety of vehicles or to market for certain size (small) boxes or for other reasons.

 

[Nico Koutouzis 10+ year member]

It is a g35 coupe and the box design is somewhat like a zenclosure box but bigger so yes its sealed from the trunk but not completely sealed as in no air whatsoever can get through.

looks like this (somewhat) see what I mean by it is sealed enough that air could get through cracks but a tad more difficult for soundwaves.

Custom Sub Enclosure | Affordable Sub Box

 

[brodeisel 10+ year member]

post te design on your box and some people will help you out

 

[Nico Koutouzis 10+ year member]

I don't have it perfect yet just rough sketches and calculations. I'll get it by the end of the week. Anyone else on the misc questions?