I found a forgotten sub in my basement. I grabbed it as a deal in some car audio shop, and has been collecting dust for years. Since I have a bunch of bookshelf speakers, it would make for a nice low extension. I also found a class D tripath amp that could power it up. Any idea of the sealed box dimensions I should use? Can it be set up to fire down, and try to pass it as a coffee table with the wife
CS1214 - JBL
CS1214 - JBL
Yes, based on its published specs it's well within the 5% rule, so plenty of Fs shift 'wiggle room'. FWIW, mobile audio drivers in general have very stiff suspensions, so that they will work well in small boxes [net Vb], so have no sag problem WRT orientation: http://www.hobbielektronika.hu/forum/getfile.php?id=260785
For ~'best' transient response, 0.577 Qtc: ~269 L/~40 Hz F3, ~32 Hz Fb
For ~flattest response, 0.707 Qtc: ~78 L/~40 Hz F3, ~40 Hz Fb
For a bit more 'bottom' bass, 0.9 Qtc: ~33 L/~43 Hz F3, ~52 Hz Fb
Of course any size in-between will be fine and you can to some extent adjust Qt by how much internal damping is used.
GM
For ~'best' transient response, 0.577 Qtc: ~269 L/~40 Hz F3, ~32 Hz Fb
For ~flattest response, 0.707 Qtc: ~78 L/~40 Hz F3, ~40 Hz Fb
For a bit more 'bottom' bass, 0.9 Qtc: ~33 L/~43 Hz F3, ~52 Hz Fb
Of course any size in-between will be fine and you can to some extent adjust Qt by how much internal damping is used.
GM
JBL specs list 28.32 liter sealed box, just not sure if that includes volume of the driver and other parts inside:
http://www.hobbielektronika.hu/forum/getfile.php?id=260785
http://www.hobbielektronika.hu/forum/getfile.php?id=260785
JBL specs list 28.32 liter sealed box, just not sure if that includes volume of the driver and other parts inside:
http://www.hobbielektronika.hu/forum/getfile.php?id=260785
That's for car audio use.
Yes, but at 40eur for 12 incher from JBL I am not complaining
I was referring to the suggested 28L sealed box for that driver. That may be fine for car audio use, but if you're planning to use it in a home environment, it's probably not going to work out too well.
I'm kinda tight with room space, so I'd like to go with minimum usable volume. What will I lose if I choose 33l as opposed to 56?
about half an octave of low end.
GM posted some box sizes above with Fb and F3s, which gives a rough idea of performance. 28L for the driver in a moderate sized room will likely leave you underwhelmed. sreten's suggestion of 56l is a nice happy medium and can be made into a convenient end table type configuration, if masking its appearance is important.
i have the older version of that sub which i played around with quite a bit. (its currently in a folded horn out in the garage) but one of my favorites was a TL coffee table, if i recall correctly it was closer to the 78l size, if not slightly larger.
Ok
It seems that THOR will fit the bill:
THOR - subwoofer
Can someone recommend power amp to use for this without breaking the bank? I see a few digital options on ebay, like this one:
TPA3116D2 50WX2 100W 2 1 Channel Digital Subwoofer Amplifier Board 12V 24V Power | eBay
It seems that THOR will fit the bill:
THOR - subwoofer
Can someone recommend power amp to use for this without breaking the bank? I see a few digital options on ebay, like this one:
TPA3116D2 50WX2 100W 2 1 Channel Digital Subwoofer Amplifier Board 12V 24V Power | eBay
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