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In Reply to: Re: Just won a pr of EV SP12B Need cabinet or baffle advice posted by freddyi on January 26, 2007 at 10:12:42:
I have a few tweeter's around some OLD vifa from Mission 780's If I was to try a OB and use a cap to x-over at 10K is that a good idea? Also if I do a 2 x 4 foot baffle do I angle it at all? Do I have to countersink the driver? Put the driver from the back? Roundover on the whole? Baffle material MDF or 11 layer pine
Follow Ups:
ask over at Darrel Hawthorne's (Silver Iris) forum, Open Baffle forum at Audio Circle, fullrnage driver forum and diy audio - might be best to take cheap piece of wood and experiment to personal taste listening distance/height/tilt/width/wingsfor low height, GA Briggs baffle seems popular at "JE Labs"
theres a free baffle modeling program called "The Edge" - not sure how it sdeals with floor boundary.
I'm just piddling with open baffle so don't have asnwers - ~10Khz acoustic rollin sounds about right.
guess you don't have SP12B's parameters?
if you go down/back in recent posts, there's SP12B in ~14 cubic vented cabinet augmented with T35.
there were some APT80 copies at ebay for $8 each - horn could unscrew - those might do ok if you don't already have something. Fostex seem popular - even piezo could do something.
Fs..............41
Vas Cubic feet..6.27
Vas Litres......177.73
Qms.............5.7
Qes........... 0.696
Qts........... 0.623
Re..............9.41
Le mH...........1.194
Mm grams........32.90
Eff 1w/1m.......94.13
cool - guess SET without loop feedback would raise Qts suitable for OB
How about building the Karlson 12, I like the idea of smaller a 2' x4' is a little awkward (I would do it, if its better than the Karlson)...Looks like the K12 is about 24" high by 15" wide. will this driver work well in there? IF I build the Karlson Can I put a super tweeter on top? SHould I use SLot's or opening on the top panel?
might have a fun sound in K12 - if wanted, super tweeter on top but probably not needed
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