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  #41  
Old 11-09-2012, 04:06 PM
astack's Avatar
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How about a 7x12?!

Pure madness


From top left:
(2) Aura's pulled from my Ampeg Portabass 212
(1) 12-500LF (1) 12-200 (1) S2012
(2) 2512 II's

I'm setting up to do small signal testing mainly to see how the PB speakers spec out. Probably should have done it before ordering everything, but my hope/feeling is they're very similar in terms of T/S parameters to the others, but just will dismal SPL, because I do really like the sound. Hopefully have results in the next week and be able to do some initial listening test.

Good news: The PB212 internal volume is 1.1 cf per driver net. Perfect to test the 2x12 configuration for now.
  #42  
Old 11-09-2012, 04:22 PM
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Quote:
Originally Posted by astack View Post
Modeled the 3012LF, and yeah, f3 in the 80's Hz.
3012LF purpose in a sealed cab?
You are sure?
Qtc?

Quote:
Originally Posted by astack View Post
Another one where in a sealed box, thermal controls. You get the full 450W down to ~20Hz.
I'm thinking the story of rudolf the rednase is a fairy tale.

Last edited by ThisBass : 11-09-2012 at 04:33 PM.
  #43  
Old 11-09-2012, 07:55 PM
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Quote:
Originally Posted by ThisBass View Post
3012LF purpose in a sealed cab?
You are sure?
Qtc?


I'm thinking the story of rudolf the rednase is a fairy tale.
Qtc as in the box parameter?

But don't listen to me, the speaker wizard Jerry McNutt thought it was good enough to suggest two sealed designs:
KappaLite 3012LF Large Sealed Design
By Jerry McNutt, Eminence Speaker LLC Limit power to 375 Watts; F3 at 92 Hz. High pass at 95-100 for high power use. Great for a floor wedge.

KappaLite 3012LF Small Sealed Design
By Jerry McNutt, Eminence Speaker LLC Limit power to 375 Watts; F3 at 90 Hz. High pass at 95-100 for high power use. Great for a floor wedge.

http://www.eminence.com/pdf/Kappalite_3012LF_cab.pdf

Again, I'm not interested in 2-way boxes, but for someone that is, this'd be mean. May be able to successfully use the same x-over used in a fearful, too.
  #44  
Old 11-09-2012, 08:05 PM
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Vocal monitoring?
  #45  
Old 11-09-2012, 11:02 PM
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Ok fair enough.
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  #46  
Old 11-10-2012, 05:10 AM
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KappaLite 3012LF Large Sealed Design

Limit power to 375 Watts; F3 at 92 Hz. High pass at 95-100 for high power use. Great for a floor wedge.
  #47  
Old 11-11-2012, 07:25 PM
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Hmm, no luck with testing this weekend. Other projects and such :/

As a side note, just came across this posting for a $75 Portabass 212 with bad speakers in Florida (not my ad).
http://spacecoast.craigslist.org/msg/3356526133.html

Perfect donor cab for this project. Just sayin'
  #48  
Old 11-29-2012, 02:51 AM
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What happened? Don't leave us hanging!
  #49  
Old 11-29-2012, 09:05 AM
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Quote:
Originally Posted by 3rdcurve View Post
What happened? Don't leave us hanging!
Work in progress. Been busy with life, etc, so minimal progress, but here's where I am:

- Test cab is 95% done. Just need to put in the jack and stuffing.

- I installed the pair of Deltalites in my Portabass cab yesterday and gigged it last night.

- Haven't don't the reverse engineering/testing of the old speakers from the Portabass because my multimeter isn't quite fancy enough. Looking on CL for a new one.

I'm hesitant to say anything about how the DL's are because A) I've only been able to play them for maybe 2 hours total, so not quite broken in yet and B) they're still hooked up to the crossover, so the critical top end isn't really "true."

That said, I wasn't very happy with the sound last night and struggled to find a good sound, TBH, but I also need to change strings so again, can't trust my judgement.
  #50  
Old 12-03-2012, 09:23 AM
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The deltalites seem to be fully broken in now and I'm MUCH happier. Lows and low mids sound are right in the ballpark I was hoping. Quick and punchy, not thin, but just right. On some parts, I'm missing the "envelope" of low end that a proper ported cab gives, but a little bass boost gets me close enough there. That's a trade off I'm OK will, as it's harder to fake it the other way. So, so far, if all the modeling is true, I should be happy with any of the drivers in the half of the spectrum. That's great to know.

Still need to pull the x-over and run them full range (assuming the stock x-over in this cab has a low pass on the woofer ). Hoping this is the case, as it's a little dull. I'm also noticing the beaming a lot more these days after moving back from a 12+6 cab. So I'm not ruling out a .5 alignment just yet, even with a vertical 2x12. The box does have a slanted baffle and tilt-back stand, but even then unless I'm 5 ft. in front of it, I lose all the highs and some upper mids.

Oh and my new (to me) V4B gets here at the end of the week and I can't wait to pair these up Hmm, doing a .5 on the cab would also make it "TB approved" for horizontal use and I could actually set the amp on top.

Finally, in terms of volume, I think this will be enough for everything I do, and never be too much either. (I play with 3 guitars but they're all currently in the process of down-sizing from 2x12's to 1x12's ) I don't think it's a huge difference from the stock speakers in terms of sensitivity AFAIR despite the stock cab being rated at something like 94dB. That said, I didn't really open up the TH500 on the speakers as I don't want to blow them right away.

Hopefully in the next week, I'll get the others going finally.
  #51  
Old 02-07-2013, 01:30 PM
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cab

Bump. Just wondering what the 2512II's sounded like in a sealed cab.
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