Tim Weaver wrote on Fri, 15 January 2010 11:01 |
Is there a regular woofer that matches these coax woofers? I'm thinking a PAS style drum fill would be kickin'.....
Or, for that matter it could be a FOH cabinet too. A double 12 plus horn where the top driver is a coax would definitely be an eye opener.
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Tim Weaver wrote on Fri, 15 January 2010 11:01 |
Is there a regular woofer that matches these coax woofers? I'm thinking a PAS style drum fill would be kickin'.....
Or, for that matter it could be a FOH cabinet too. A double 12 plus horn where the top driver is a coax would definitely be an eye opener.
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When you add drivers so you have two or more woofers you have some design choices to make.
Do you want the extra driver to add SPL output with the same low end extension?
Or the same or less SPL output, but lower frequency response?
If you add a “similar” woofer you can gain as much as 6dB, as long as you do not exceed the output of the compression driver and horn.
You would cross both woofers over at the same frequency (4th order 1kHz to 2kHz)
To get more low frequency extension the woofer you’re adding will not have as high a sensitivity.
So the entire speaker goes down in sensitivity.
In this case one woofer might be crossed as low as 100Hz. Or if you use a 2nd order or 1st order as high as 500Hz. It depends where the mid woofer rolls off naturally.
Note that the actual solution might be much more complicated. These are just some examples in principle.
In other words louder or lower, but not both.
You can get more low end out of paralleled woofer pair (both at 1kHz) just because each driver is seeing half the load. You might be able to EQ in some lows, but you must know and respect where the box is tuned if it happens to be ported. Keep the EQ above the tuning.
The 12680 box is tuned very low for that driver and how small the box volume is.
If you blow into a vocal mic the driver will not jump. I tried this with a SM58 and a Audix OM-7vocal mic.
But when I switched to a wide band condenser that goes below 30Hz (AT-813) when I blew into the mic the driver jumped like you expect.