factory and aftermarket sub

[Grayson Hogue]

ok so i bought an MTX RT251D amp and a JL 8w0 sub in a box this guy made for $100 total.

the sub he said he bought the end of the summer and the amp he got a while ago. i was at school and it was kinda spur of the moment but anyway, i want to get as much out of this sub as i can and since it cant take that many watts i was wondering if i could use the factory sub too. i dont really know if thats possible and i dont want to break anything. also he made this box out of like cardboard and coated it with i think rubber bed liner so i was also wondering if i could put some of that polyfil stuff from inside the factory sub box into the box i that holds the new sub. im not sure what that does or if it makes it sound better but any advice would help.

yea thanks:blink:

 

[Tony Tassillo]

im staying away from this one.........

 

[Jacob Dryer]

Don't mix and match subs. Stick to just using the JL.



Is the box sterdy (sp?) is it sealed well?



Polyfil will only make the sub think the box is bigger. It might help it sound a little better if it is too small, but I couldn't tell a difference when I added it to my box (it's made to spec though)

 

[Shelby Crane]

Come on MPTonyT! This is right up your alley.

 

[Tony Tassillo]

ok here it goes. when installing audio components it is always better to stick with two things that match. in this case you do not have two so you are stuck with one. like JD said i would stick with the JL sub (not because i use JL) but because it is a more reliable sub and with your amp i dont feel that the factory sub would handle that amp. 250 watts peak which calculates to 175 watts RMS (Root Mean Squared) or .707 x the max.



you will need to ensure that the box that came with the sub is sturdy. cardboard with rhino lining is not strong enough to withstand the havoc that the JL will have on it. if for some reason the individual did use cardboard (i think it might be 1/2 MDF (medium Density Fiberboard)) you will need to have a new box built (IMO). but that of course is completely up to you.



Speakers will last forever if they are cared for properly. i set my systems to where even if im not driving my truck and someone else is they cant blow it. (No Matter What) do no let the gain of the bass amp be your volume adjustment. let the head unit be the adjustment. what i mean is..... do not crank up the sub amp and not be able to turn your radio over volume 15. you should be able to turn the radio up to what ever volume and still have reasonable bass. dont think you are going to get spine shattering bass out of an 8 (just trying to help).



Good luck with your systems and as always were always here to help (if we can)

 

[Mike Wilson]

Run Forrest (g), Run!!!!



I, being the old-school audiophile, mavin, or afficionado, do not believe anything below

a 10" speaker can be considered a "Sub-Woofer". Anything below 10"inches, is, in my book,

just a "Round Mid-Range", IF properly wired and powered, and acousticized! (Did I just

make up another word?)



All above MPTonyT said was/is correct!



Or, per an earlier post, tonight, that I had read, you pay $39 for a speaker, you got a

"$39 Speaker"!. You pay for a cardboard box with an 8" sub, and some duct tape and

foam, you got an 8" sub and some foam "sound"!!!! Not Good!