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C36 Viscount LE14A eWaves

Thanks, but now I'm confused: At that baffle width the woofer would play up to only around 285 Hz?
 
Zonker92 said:
Thanks, but now I'm confused: At that baffle width the woofer would play up to only around 285 Hz?
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It means that centered around 285Hz, the woofer's radiation will pass from ~full-space at lower frequencies to ~half-space at higher frequencies, wich means up to 6dB more output above this point. An early low-Q rolloff on the Xover or a straight-up LC circuit can do the job to pad-down the higher output above this point.

Very wide cabinets located close to room boundaries may entirely forgo BSC. My 22" wide enclosures in a small room don't truly need it, but I still ended-up with a 2dB pad-down above 200Hz, via miniDSP.

az
 
OK, I just read up on baffle step and I think I grasp at least the basics of it.

I note that the crossover that I used for these speakers (see my first few posts in this thread) does not appear to have a BSC circuit on the LF. However, the speakers seem to have abundant bass. How does the crossover design that I used address the issue of baffle step, or was that even necessary? Just curious now. Thanks.
 
Zonker92 said:
OK, I just read up on baffle step and I think I grasp at least the basics of it.

I note that the crossover that I used for these speakers (see my first few posts in this thread) does not appear to have a BSC circuit on the LF. However, the speakers seem to have abundant bass. How does the crossover design that I used address the issue of baffle step, or was that even necessary? Just curious now. Thanks.
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I'm guessing that the somewhat early (900Hz) roll-off at Q=0.7, coupled with the relatively large baffle must minimize the need for any other obvious corrective action. Maybe the LE14 starts to roll-off naturally at some point before 1kHz too, though I'm not familiar with this driver. Such speakers can only require correct room placement to sound balanced. Baffle-step becomes more of an issue the thinner your baffle gets.

az
 
And the verdict???

Zonker92 said:
OK, just fired these up and am quite pleased. The pictures should be pretty self-explanatory.

I bought empty cabinets on Craigslist; looks like someone re-veneered them at some point. They still had the slots in the bottoms for grills, so I filled them with MDF inserts and veneered the slots (see the photo further below, with the drivers face-down on the baffles). The new grills are kits from Parts Express and the cloth came from JoAnne Fabrics.

Thanks, Zilch, dumptruck, wiredbecker, GordonW, djnagle, Joe L, and everyone else who helped me!
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:thmbsp::thmbsp::thmbsp::thmbsp::thmbsp: WAY UP! Awesome!
 
I have the LE14A/B&C combo and was originally going to use the QSC waveguides. Bought them then realized how huge they were (much bigger than the normal guides). Returned them and ended up buying a set of Wayne Parham's H290C waveguides. skywave-rider was nice enough to pair the B&C's with both the QSC and the H290C's, using my crossovers, and made some measurements (see the ewave thread). The results are nearly the same. Right or wrong, as a starting point, I'm using the bottom-end from jackgiff's LE14A along with the top-end from the Deluxe ewave build. I FINALLY have my baffles cut, am waiting for paint to dry/cure and will be able to put these together and fire them up in a few weeks, if all goes well. I'm stuffing them all into some repurposed Barzilay cabs. I don't have any of the fancy measuring mics and such but would be willing to take measurements and post results if anyone wanted to loan out any equipment.


Edit:

Found the post for you since it takes a LOT of digging to find:

http://www.audiokarma.org/forums/showpost.php?p=6113189&postcount=14769
 
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Thanks; they really sound fantastic (I mentioned that somewhere in this thread :D). I had them in my house for a few days before giving them to my buddy, and I played them against my JBL L250s, which have all the 250Ti upgrades. Those speakers have a later generation of the same 14" woofer.

The bass was more prominent than the 250s, but very tight and well-controlled. The midrange and clarity were excellent, and the eViscounts completely filled my large living room with sound; big sound stage. I honestly had difficulty saying which pair of speakers I preferred, as between the two. I believe that I would be perfectly happy with the eViscounts.

And my buddy loves them. He's driving them with a smaller SS Mac amp (100 WPC I think) and they fill his living room very well. One night he had a party and he says they completely rocked the house, too. They were dancing for hours.

But see this from another thread:

fpitas said:
... Beranek's Law:

"It has been remarked that if one selects his own components, builds his own enclosure, and is convinced he has made a wise choice of design, then his own loudspeaker sounds better to him than does anyone else's loudspeaker. In this case, the frequency response of the loudspeaker seems to play only a minor part in forming a person's opinion."

L.L. Beranek, Acoustics (McGraw-Hill, New York, 1954), p.208
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Stunning work, ( saw the pic you posted in another thread ) / just gorgeous / absolutely blue ribbon stuff ( as earlier effused ).

Zilch would be just so delighted with all your eWave efforts .

:)

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