I hear everyone talking about JBl 600.1 what is so great about it, i know it is underrated and is a very nice reasonably priced amp....I was just wondering because would that make my V-Maxs hit harder than my sony 1200w?
by the way want it louder try a temporary baffle inside the box since your box is ported and you might see a 3 db increase from what i read (i say temporary because if it doesnt work then you can remove it or maybe even experiment with angles with the baffle) I want to try this on one of my boxes as well.
I don't know what that Sony puts out RMS truely, but power won't make as much of a difference on SPL as you think unless you're doubling or tripling it. It takes roughly twice the power to make a 3 db increase, same as you could get from sound deadening or porting the boxes (but more expensive). I mean, you'll notice a difference w/ more power, but not as much as say porting the boxes, thoroughly sound deadening, new subs, etc. As far as reliability, the JBL is much better. But, if you plan to upgrade down the road, I'd hold on to what you have for as long as possible and try to save money for as long as you can.
I think everyone is pushing the 600.1 because its readily available on ebay used and cheap. Its very good quality and because its easy to match with subs impedance-wise(produces the same power into 2 or 1 ohms) it can usually be recommended even with unknown speaker impedances. Its also a discontinued model that used to go for about $500(I think thats what Jonathan said). I see used ones going regulary on ebay for just over 100 bucks.
600 watts of clean power that will probably match well to your subs is kinda hard to beat.
steven you just built that box give the baffle a try what do you have to loose except time two pieces of wood (which you prob have left over in scrap) and a possible spl gain of up to 3 db and jon is right on with my opinions exactly
O i also just got done putting 2 pioneer 6x9's in the rear deck and the front doors, they work nice, but yes i know they could be better, i couldnt pass them up for $20 for 2 pair. And I can definentaly tell the easy flow between the high frequencys and the low ones, it sounds much better than the stock P.O.S. i had....Yucky, And another thing, I put so much fiberglass insulation in the back of my car to help the trunk stop rattling...kinda helps....
I saw some crazy high output enclosure design somewhere which was kinda like half snailshell, half waveguide. Normally the air mass inside a ported box is pretty much static except close to the internal port opening. This thing had Baffles(flat surfaces) which in some kinda crazy way I didn't fully understand managed to direct airflow to the port. This increased the velocity/magnitude of the oscillating airmass contained in that port somehow. Because a port's airmass behaves much like an actual driver this increase in "excursion" results in increased acoustic output aka higher SPL.
Apparently altho this setup is louder the SQ is not quite equal to a normal ported box so there was some argument on whether the thing was worth building or not.
I think what Sean was trying to do was increase your port velocity and output a bit by channeling some airflow to your port with a piece of MFD.