stroker_SS

Hi, i was just wondering if you guys could let me know if poly-fill was a good idea. Well i have a RF 10" not sure of wattage but it handles my bridged 800w MA audio amp. Now the box is a sealed 13" square box i made out of particle board(it was just laying around). Also I used poly fill in my stock speaker located 6x9 pioneers(250w 4-way). The poly fill has gotten rid of some distortion but didn't help much with the bass, it actually has gotten quieter. Would a larger box help with bass, maybe ported, dimensions? Anything would help, thanks much.

xpndbl3

iTrader: (5)

throw out your particle board box and build one from MDF first off, search around here for plans, etc.

True_bird

yea i second that about throwing away the particle board it wont work for a sub box as it will acually fall apart, my friend had one and was braging about how great it made his sub sound and i said i would give it one song on half volume before it fell apart and sure enough my 1000 watt visonik set up ate it lol seriously fell apart invest in some MDF rewarding in the long run.

Kyle

Gummie

Polyfill is used when you need more volume out of a box. It tricks the sub into thinking the box is larger. How tightly did you pack the box? It shouldn't be very tight at all.

As for bass loss, it shouldn't produce any loss, unless you're talking about the 6x9's. I wouldn't bother filling those because the sail panels are not sealed. They vent into the hatch area.

Jim85IROC

iTrader: (2)

IT could produce a "loss" depending on a person's perspective. If the speaker is in a box that's too small (which is almost always the case when you stick a 6x9 into a box), you get a high q alignment that causes a huge bump in output, followed by a severe dropoff below that bump. Poly fill will fool it into thinking it's in a slightly larger box, causing that bump to be a little lower (i.e. a smoother response). Lowering that bump will make it sound like there's less bass, even though you're getting closer to a more accurate response.

Typically, the maximum you'd want about 1 to 1.5 pounds of polyfill per cubic foot of airspace. This is really quite a bit and will be fairly densely packed, but you don't want to over-do it because if you pack the poly too densely, it'll no longer work as intended and will just make things worse.

stroker_SS

Took the polyfil out of the stock speaker location and packed the box a bit tighter about 3/4 of the 20 oz. bag. The problem seems to be fixed, the bass is a bit deeper and not as distorted. Sounds pretty good, now for that darn particle board box.

GOTMYZ

iTrader: (1)

I THIRD THE OTHERS...

MDF is what you need to use on the box.
Only use polyfill if you cannot get the correct size for the box. The sub will sound better if you can get to the correct size for real.

I have a 12" in a box wilth no poly.... Hits very hard.

Gummie

I realize that you are now happier but I feel compelled to throw more of my thoughts up.

I'm going to step out on a ledge here. Assuming this is what you mean by partial board - not that cheap *** stuff some desks are made out - and it's a decent thickness (3/4") your material isn't going to have that big of an impact on a box that small. It's only a 13" cube, which means that there are no large flat sections that will have the ability to flex much.

That said, your box is pretty small (.88 cubic feet assuming 13" is the box size and wood is 3/4" thick). While you can get away with running a smaller box on some subs (no idea on yours) they generally require more power and don’t hit as hard/low as a larger box.

If you're going to build a new box I suggest MDF because it's a uniform density wood, meaning that sounds will always reflect the same way off it unlike particle board/plywood. It’s also extremely ridged. I also suggest building a bigger enclosure. Ported vs sealed has been beaten to death. Ported = louder, sealed = easier and a typically flatter response unless you tune the ported box really low.

I'm sure someone will smack me if they disagree

stroker_SS

Yea i meant OSB, it's 1/2" not 3/4 but it holds together well, strength wasn't an issue. I know people say ported is louder, maybe in some situations but when i had 2 1200 watt legacy, i know cheap subs, it actually hit about twice as hard sealed with the portable/sealable box. I inverted the subs to a little more bass.The sub is a RF 10" XLC, from what i'm told its an old model but it still handles the bridged MA audio 800 w amp so its good. Thanks for the help.

Jim85IROC

iTrader: (2)

A properly tuned ported box will almost always play the deep stuff louder than a sealed box, but some subs, like those cheap legacy subs, need a retardedly large ported box to function properly, and putting them into anything smaller will give poor results.

With conventional, quality subs with a qts that's not sky high, your deep bass will be louder in a ported enclosure every time.