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Old 15th January 2013, 09:48 PM   #1
diyAudio Member
Join Date: May 2012
Default Help me pick a woofer!

I am trying to figure out a good replacement woofer for my Realistic (don't laugh) T-200 cabs. I am just having a helluva time trying to find the OEM drivers so I figure I would go after'mkt. The originals are 10",16 Ohm, & two woofers in each cab in Xover. There are only 1st order caps on the squakker and tweeter.
The boxes have a rated volume of 2.12 Ft(3).

I was looking at these from MCM MCM Audio Select 10'' Polypropylene Woofer | 55-1215 (551215) | MCM Audio Select which has a Qts. of .53. I also was looking at these from PE: Dayton Audio DC250-8 10" Classic Woofer 295-315 which have a Qts. of .45 which, if I am correct in my thinking, are decent enough numbers for a sealed cab. I realize that these are 8 Ohms but I was going to be driving these with a good amp that is 4 Ohm stable so I am not really worried about the change of impedance. They have 4 Ohm versions which I can wire in series if I want to keep the 8 Ohms in the config but I will be giving up some Db's.
I saw some woofers from Seismic Audio that are 16 Ohms but they are geared more towards guitar amps.
Am I close?


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Old 16th January 2013, 04:06 AM   #2
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Join Date: Feb 2002
Location: Western Sydney
with no xover on the woofers, you'd need drivers with a smooth roll off,
you'll also need woofers with sensitivity equal to or higher than the mids & tweeter

Model your two choices in Unibox & see with works better, You could even port those boxes if that works better with woofer you choose
(& take the opportunity to add a better xover...?)
Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency

Last edited by PeteMcK; 16th January 2013 at 04:10 AM.
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