Another "How to wire my sub" questions

[chevyin]

All I can say is that I do notice a increase in volume by tirning the gain up, but sounds the best to me is setting the gain on my amp at just under 1/2 and the sub volume on the headunit at -2. Now the gains on the 4 channel amp are both set at roughly 3/4. Everything is "blended" quite nicely, with nothing over powering anything else. Granted everybody's system will be different, and require different settings. I don't know all the tech stuff, just what sounds good to my ears.

Absolutely, provided a person knows how to listen for distortion, setting gains by ear is a very acceptable method. I tend to go into the more elaborate ways of doing things, to explain the nuts and bolts of it all. So long as you're happy with how it sounds, its set up 'correctly'.

And yes, turning the gains up (more sensitive) will always increase output, even once it begins to clip. Clipping is progressive, meaning you can clip an amp worse and worse the further you deviate above its rated input sensitivity.

 

[73k5blazer]

I got my divider board installed. Wasn't that hard really, tried three pieces of cardboard before I had the cardboard right, traced it on mdf, cut it, perfect fit. Countersunck screwed it from top rail and inside vertical and glassed the seems from both sides working through the 5" speaker hole on the front (long reach), and the 10" sub hole on the back side.
Where it ended up, that space is about 1.475cu/ft, it's hard to estimate with the body contour and wheel well though. Infinity wants a 0.6 for sealed, and 1.0 for ported. So I think I'm still operating within the infinite baffle range though. The amplifier will be inside that space as well though, should that count negative against my estimated volume? If the amp is in there too, is it going to over heat? (I think I'm going the 8ohm route, amp is 350@4ohms, they don't list for 8ohms, but using 8ohms the amp shouldn't be working that hard, right?)
After I get everything all finished, I'll post pics.

 

[chevyin]

I got my divider board installed. Wasn't that hard really, tried three pieces of cardboard before I had the cardboard right, traced it on mdf, cut it, perfect fit. Countersunck screwed it from top rail and inside vertical and glassed the seems from both sides working through the 5" speaker hole on the front (long reach), and the 10" sub hole on the back side.
Where it ended up, that space is about 1.475cu/ft, it's hard to estimate with the body contour and wheel well though. Infinity wants a 0.6 for sealed, and 1.0 for ported. So I think I'm still operating within the infinite baffle range though. The amplifier will be inside that space as well though, should that count negative against my estimated volume? If the amp is in there too, is it going to over heat? (I think I'm going the 8ohm route, amp is 350@4ohms, they don't list for 8ohms, but using 8ohms the amp shouldn't be working that hard, right?)
After I get everything all finished, I'll post pics.

Sounds like you've been busy.

Anything over the Vas rating of the sub is considered infinite baffle. You'll have to consult the specs for your sub to determine if that qualifies, it may be too small and end up being an oversized sealed enclsoure. One way or another you should be fine now though. If it turns out to be too small for IB, mount a solid object inside the space that pushes the internal volume down to where you want (.6-.75 cubes). To estimate the volume of an odd shape like that, you can pack it full of something like packing styrofoam (popcorn), then remove the popcorn, place it in something like a 5-gallon bucket and measure it. Viola, internl volume measurement. Many people use this technique when building those odd shaped fiberglass enclosures.

Yes, any solid, non-compressable objects inside the enclosure space will count against its internal volume. Running the amp at 8ohms will help keep it cool, therefore I doubt there will be an overheating issue. Make sure you seal up all those wire holes though.

Keep us posted.

 

[73k5blazer]

Vas is 31 litres, my esitmate (conserative, it's probably a little bigger) is 34 litres, taking the amp into account, so guess I'm infinite baffle or is that too close?

Yep, I've got sealed poly grey conduit running right into the hole attached with a pass through connector to the floor of the cavity and sealed up with silicone caulk on both sides. It's sealed. Now I just have to make a gasket for the taillamp housing (that opening backs into that cavity as well). The lens screws to the housing with a gasket in between, but the housing is just screwed to the body, no gasket, so I have to make that one. Just need to figure my final wire routing so I can complete running the conduit and I should be all set. ANother couple of weeks when I have a more wiring completed (the dash area), I should be able to fire the whole thing up!