Hey guys. i have been given a rather large 12 inch sub. a "Impulse CW-1212". rated at something like 1500 watts.
some one has had it, carrying too much stuff in the boot that has fell against the cone and caused the connecting paper/card cone to be crushed.
judging by how sagged the cones suspension is i'd say it has lived its life upward firing.
now i have very carefully taken off the rubber and metal top cone to get assess to the underside the metal cone is very dented but still "in shape" (i don't care what it looks like)
sadly i cant do anything about the sagged suspension. i have tried heating it up with a hot air gun to try and shrink it back down but no luck.
my question is, given the top cone is metal, could i also use a thin metal "connecting cone" instead of a crappy card/paper cone? i dont think that it will effect it that much if i get it lined up all right.
also given by some huge feat of engineering i manage to get this thing all back together and sounding (somewhat) good. i want to build a box for it.
but.. i want to build it small. i am willing to sacrifice sound quality for boot space.
here is the thing though. of bass i do like the low frequency stuff. however the rule of frequency says that the lower you go, the bigger the resonance chamber (or aerial if you are a radio ham like me
) needs to be.
now i am guessing that this is totally true the same for a sub in an incorrect size box.
is there some kind of "box space needed to achieve X amount of hertz frequency" calculator somewhere i can use so i can build a "tuned" box?
also, what kind of amp should i run this sub on? (i do not own an amp yet so its in my "to get" list) i am guessing it is dependent on ohm/resistance of the coil?
also to try to compensate the sagging of the cone i am going to make it downward firing. with an opening breather at the top or side of the box.
few pictures of the sub in question at the bottom of the post.
anyone has any suggestions just fire them off to me.
some one has had it, carrying too much stuff in the boot that has fell against the cone and caused the connecting paper/card cone to be crushed.
judging by how sagged the cones suspension is i'd say it has lived its life upward firing.
now i have very carefully taken off the rubber and metal top cone to get assess to the underside the metal cone is very dented but still "in shape" (i don't care what it looks like)
sadly i cant do anything about the sagged suspension. i have tried heating it up with a hot air gun to try and shrink it back down but no luck.
my question is, given the top cone is metal, could i also use a thin metal "connecting cone" instead of a crappy card/paper cone? i dont think that it will effect it that much if i get it lined up all right.
also given by some huge feat of engineering i manage to get this thing all back together and sounding (somewhat) good. i want to build a box for it.
but.. i want to build it small. i am willing to sacrifice sound quality for boot space.
here is the thing though. of bass i do like the low frequency stuff. however the rule of frequency says that the lower you go, the bigger the resonance chamber (or aerial if you are a radio ham like me
) needs to be.now i am guessing that this is totally true the same for a sub in an incorrect size box.
is there some kind of "box space needed to achieve X amount of hertz frequency" calculator somewhere i can use so i can build a "tuned" box?
also, what kind of amp should i run this sub on? (i do not own an amp yet so its in my "to get" list) i am guessing it is dependent on ohm/resistance of the coil?
also to try to compensate the sagging of the cone i am going to make it downward firing. with an opening breather at the top or side of the box.
few pictures of the sub in question at the bottom of the post.
anyone has any suggestions just fire them off to me.
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