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h2ohangtime

Sub Help: Who’s Cut Their Hump?

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h2ohangtime    3

After exhaustive search here and on WW among others, I still haven’t found a clear answer as to whether or not I can cut out the molded-in footwear under the helm of my ‘07 Typhoon C4. I’m trying to build a system with 4 JL MX650’s, a ported JL 10W3, and a JL M1000/5 or Alpine PDXv9.  Problem is that I can’t find a good way to install the box without getting rid of that footrest/hump under the helm.  Is it structural?  Just cosmetic/meant for a factory IB sub only?  Has anyone cut it out and had good results?  Any pics?

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h2ohangtime    3

Anyone have pics of this project on an Avy/Typhoon?  Is it as simple as cutting along the planes of the floor and starboard hull, re-glassing with several layers of mat and resin, then re-carpeting?

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cjohnson    33

I did this in my old 05 Avy but can't find the pics.  I cut out the face and top of the footrest then built a ported box that followed the angle along the front.  I re-glued the existing carpeting and cut out holes for the sub and port. If you have the ability to build a box definitely do it.

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bomoseen avy    37

Did this a few years back on my '03 Avy. I had a heater port and a sub in the footrest. Sawzall around the perimeter. Used styrofoam between the back part of the hump and the steering cables and other junk that was hanging out back there so I didn't cut anything. 

Built a "bridge" over the hole in the floor with birch that was elevated using some plastic washers so air would flow in there and keep from collecting moisture. Coated the birch in fiberglass resin and think I plastic-dipped in black. Then mounted box with new JL sub onto the "bridge."

Later built a section next to it to hold the heater vent. Was very please with the results

Edited by bomoseen avy
grammar
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h2ohangtime    3
4 hours ago, bomoseen avy said:

image.png.6216addba813fd805b0cde75fac8c3dc.pngmed_gallery_1556_413_219154.jpg

Thanks! Anything that would preclude one from just filling the void with foam, trimming it flush, and then re-glassing with several layers of mat?

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bomoseen avy    37

not my field of expertise. My project was with input from other crew and box/subwoofer support worked flawlessly.

Good luck!

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Wylie_Tunes    138

I see no reason why you could not close the hole up in a permanent fashion. There is nothing in that void of the bilge that is serviceable. On the flip side, once the enclosure and facade are in place, you will never no it one way or the other. So nothing wrong with leaving the cut out as is.  

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h2ohangtime    3
2 hours ago, Wylie_Tunes said:

I see no reason why you could not close the hole up in a permanent fashion. There is nothing in that void of the bilge that is serviceable. On the flip side, once the enclosure and facade are in place, you will never no it one way or the other. So nothing wrong with leaving the cut out as is.  

That makes sense to me.  Probably best to go with the open way first and then close it up if that doesn't work out.  Thank you!

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