Newsgroups: rec.audio.pro,rec.audio.car,rec.audio.tech Subject: Re: Speaker box too small????? (problems!) References: <[email protected]> [email protected] writes: > I am curious about the following: > I have two Rockford Power series 12" subwoofers that I bought two years > back. They are ONLY recommended for Ported and dual-reflex bandpass > applications, but the guy that installed them and made my box for me put > them in a sealed enclosure. I have been having TONS of problems with > them for a little under 1 year now. My first problem was when the leads > that come out of the inside of the speaker to attach to the terminals > (leads are silver, and very very flexible...) burned off (yes, BURNED... > charred and everything as if they overheated) from right where they > connect to the speaker terminals. > I have fixed them numerous times, and they keep burning off. > > I have a Rockford Fosgate amp powering them that supplies 450~500Watts > RMS, and the gain on it has always been at 65%. The subs are crossed > over to below 80Hz. I have also never had the volume on my headunit > past 19 (and it goes up to 30). > > My thinking (though I am no expert on this) is that this burning off of > the leads is because of the sealed box? No. The box used for speaker elements do not have anythign to do with the bunign of the wires! Wrong type of enclosure can make the subwoofer sound bad, but not burn the wires. If the wires burn, then the problem is in wiring materia, connectors or how the wire is connected to terminals. > And possibly this box is too small? (about 2 cubic feet or so) This has nothing to do with the burning of the wire. If the box is wrong size, the elements do not reproduce sound correctly, but the wires doe not burn because of this. > If the speakers needed a ported > enclosure, and the ported requirements were 1.5 cubic feet per > speaker... they would require a ported box with 3 cubic feet I assume? > Then if I have a sealed box with only 2 cubic feet, the speakers do not > have the freedom of movement they are supposed to, right? because there > is less air behind them, and no "vents" so that air is far harder to > compress.... SO now the speakers are going to have to push much harder > to work... kinda like if you placed a weight on top of the speaker. Can > this be the reason my leads are burning off? No. The wires burn because they are loaded with excessive power or the connections are bad. The enclosure type does no noticably affect the stress put to the cables. > The place I bought them from is an authorized Rockford dealer. Being > two years since my purchase, do I have any kind of argument here that > might get me my money back? These speakers really are more frustration > than they are worth, and at the $1000 price tag it cost me for the box > and speakers .... I am not too happy. I am waiting on a response from > Rockford Fosgate as well, but I was hoping I might find out from a few > of the Pro's on here what their opinion is on the matter? :) According your description either the wire itself, the connectors where the wire is connected or the connection method is not sufficent for the applications. My advice to correct the problem would be to replace that whatever wire is with good old-fashioned 2.5 mm^2 copper wire. Replace also the connectors on the speaker (if they are also bad). Then connect the cables very well to the connectors. And now your sound system shoudl work very well. > Thanks for any and all help! And please, reply to me directly as well > as the group... cuz these groups are huge and I can't always pick > through them all! :) -- Tomi Engdahl (http://www.iki.fi/then/) Take a look at my electronics web pages at http://www.hut.fi/Misc/Electronics/
