Hi everyone !
Working on a project with strict specs, I was wondering if the use of car coax speakers could be the solution.
Having a small enclosure to use, full range speakers never go low enough in a sealed design. I don't really have room for a 2-way configuration, so coax would be a good way to go to get the "full-range" and still go low enough.
I understood that car speaker are meant for infinite baffle configuration, but what would be the effect on a 50Hz rated car speaker in a sealed box ? Would I just loose a small portion of the frequency response, or would it be a complete disaster ? I can't get any T/S parameters for any of those I'm interested in
And also, would a open baffle configuration be better ?
Thanks for your help
Working on a project with strict specs, I was wondering if the use of car coax speakers could be the solution.
Having a small enclosure to use, full range speakers never go low enough in a sealed design. I don't really have room for a 2-way configuration, so coax would be a good way to go to get the "full-range" and still go low enough.
I understood that car speaker are meant for infinite baffle configuration, but what would be the effect on a 50Hz rated car speaker in a sealed box ? Would I just loose a small portion of the frequency response, or would it be a complete disaster ? I can't get any T/S parameters for any of those I'm interested in
And also, would a open baffle configuration be better ?
Thanks for your help
What size coax? The size will matter. You would also need to listen to the speakers. Some are screamers. Some sound nice and would likely have a better response on the low-end.
What about a passive radiator?
See what Parts-express has to offer. There are reviews by some who are fairly knowledgeable.
What about a passive radiator?
See what Parts-express has to offer. There are reviews by some who are fairly knowledgeable.
I can fit a 4inch driver in what I have now
I think I'm gonna have to trust reviews on that... But that's definitely something I will check ! I don't really have any way of testing these before buying (to my knowledge)
That's an option I'm considering, but once again, I'm a bit in the dark since I don't have much info on these car driver, and the few "regular" coax drivers on parts express don't seem really convincing...
With a 4" driver, to have the low-end (probably around 50Hz) within 10dB of the mids, you'll need a large enclosure. If you find a 4" driver with a reasonably flat response to anything reaching bass frequencies, it's likely to be expensive and be very low efficiency.
Hoffman's Iron Law: "You can have low end extension, high efficiency, or small enclosure size. Pick two."
Hoffman's Iron Law: "You can have low end extension, high efficiency, or small enclosure size. Pick two."
If you're after moderate listeining levels you can make the enclosure "too small". That will lead to an earlier rolloff in the bass and some peaking around the resonant frequency of the speaker/enclosure-combination. This is easily fixed with a Linkwitz transform filter in DSP.
I do that for my 3" tang band full rangers (my pc speakers) and increase bass ~10dB. Of course you loose 10dB max SPL but thats perfectly fine as I'm sitting right in front of them. They pump out some nice bass flat down to around 50 Hz. Pretty impressive for a 3".
Btw. closed enclosures are easily simulated and you can determine the Fr/Q in the enclosure and then apply the linkwitz transform accordingly.
I do that for my 3" tang band full rangers (my pc speakers) and increase bass ~10dB. Of course you loose 10dB max SPL but thats perfectly fine as I'm sitting right in front of them. They pump out some nice bass flat down to around 50 Hz. Pretty impressive for a 3".
Btw. closed enclosures are easily simulated and you can determine the Fr/Q in the enclosure and then apply the linkwitz transform accordingly.
All 4-inch car "woofers" have resonant frequency Fs at 100 Hz or above, so it is impossible to reach 50 Hz with them without equalizer. But, you can tune a vented box to about 70 Hz to get some resemblance of bass. Or, use equalizer for a sealed box.
What is the box volume?
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