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Zilch's AK Design Collaborative - Econowave Speaker

RayW said:
It's called a plane wave tube. I don't remember how we worked out the total length but it was something like 14'. The idea is to keep the signal propagating as a plane wave and to measure it "unmolested" so you're measuring what the horn throat would see. At least that's how we did it at Eminence back in the old days (late 90's)




Don't know about "better" but you can also contact Kim Girardin. He was selling callibrated mics that I think were based on the Panasonic capsule. I believe you can get his contact info through the TrueRTA site.

Ray
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Thanks for the information. I will try to contact Kim about this, and see which will serve my puposes, sounds promising!:yes:

Russellc
 
skywave-rider said:
Thanks Zilch, thanks, Jack, Russell et. al..:ntwrthy:
U learned me good.

I actually feel guilty if I don't keep up with this thread.

Econowave is a perfect way to introduce listeners to high quality and accurate reproduction which is not based around black box technology.
Liberating.
:thmbsp:
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:thmbsp:
 
SMKSoundPro said:
4982 posts!!!

Are you kidding me????

Okay, 1st things 1st, start at the beginning!!!

Scotty.
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Hi Scotty,

What took you so long to get over here. Welcome.

Become a regular contributor on this forum. It's a great place. See all the fun we have been having?

Friends just passed through Anchorage. I told them to visit Mad Myrna's, but they said they didn't have time. Their loss, right?
 
Zilch/RussellC

I'm getting ready to start building cabinets for my LE14/220 econowaves.

Would this be the correct layout for the bi-amped CC crossover?

Thanks
George
 

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Thanks to keg and Cosmos I have another pair of waveguides and Selenium 210s. I've got crossover parts on hand for whatever kind of networks I need to build.
I have no idea what these will end up in. There are so many possibilities. I plan to build them up into semi-permanent 'modules' with crossovers. Tha twill allow me to drop them on top of any woofer/cabinet combo driven through a line level LP crossover. There's a wide range of different combos tha tI want to try, from the conventional (Le10) to the absurd (B110). I'm sure it will be fun.
 
gcarlberg said:
I'm getting ready to start building cabinets for my LE14/220 econowaves.

Would this be the correct layout for the bi-amped CC crossover?
Click to expand...
Yes, for the low-sensitivity version.

Take out that 9V battery across the LF input, though; there's no V1 there.

Also, you've shown the generic lowpass; you may want to adapt Jack's alternative variant for LE14A:

http://audiokarma.org/forums/attachment.php?attachmentid=90115&d=1210028771

That'd be two 30 uF caps and a 2 mH inductor.

Further, I have twice now verified that you'll need the high-sensitivity version of the highpass with LE14A and D220Ti, two 3 uF caps for C3a & b, and R1, R2 per that schematic, or 16 and 25 Ohms, respectively, if you're using the Dayton R's.... :yes:
 
Kegger said:
Nice collection there Russ!
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Thanks, its modest, you certainly have a pile of treasures as well! Thanks for contributing. Hows the 2225H project coming along? I wish more would use the large format JBL drivers, w/o measuring equip I'm stuck with either empirical wildass scientific guessing, or following proven paths. I spent enough money trying to "learn Altec" and dont relish the expense of learning the hardway again:D Next up has got to be measuring equipment for sure.

Russellc
 
gcarlberg said:
Thanks - somehow I overlooked the V2
George
Click to expand...

I'm glad you are going to try the charge coupled version here, and am waiting to hear what you think of its sound. Have you tried CC crossovers before? This was my first try, and there seems to be an improvement to me. It may very well be subjective, but I definately thought it was worth adding to the collective knowledge of Econowave. Keep all informed of your findings.

Russellc
 
Zilch said:
Yes, for the low-sensitivity version.

Take out that 9V battery across the LF input, though; there's no V1 there.

Also, you've shown the generic lowpass; you may want to adapt Jack's alternative variant for LE14A:

http://audiokarma.org/forums/attachment.php?attachmentid=90115&d=1210028771

That'd be two 30 uF caps and a 2 mH inductor.

Further, I have twice now verified that you'll need the high-sensitivity version of the highpass with LE14A and D220Ti, two 3 uF caps for C3a & b, and R1, R2 per that schematic, or 16 and 25 Ohms, respectively, if you're using the Dayton R's.... :yes:
Click to expand...

Are you still recommending the low sensitivity version for those LE14A users that are combining that with the B&C DE 250?

Russellc
 
There should be about 10 or so new B&C DE 250 owners out there, and while I realize that some may have them for projects other than Econowave,(:nono:)
I assume many are e'wavers. I'm still awaiting Zilch's recomended part to arrive from PE, but even with standard E'wave crossover isnt bad.....

Anyone else? Any of you other JBL 4507/4647 E'wavers have anything to report? Or are you just enjoying?:music::thmbsp::yes:

Russellc
 
Personally, I think this is the most useful discussion thread I've ever come across. Both for the specific build project and for all of the associated theory and practical speaker building information. I've learned more doing this project that probably all of my previous soldering iron fumbling with speakers in the past put together.
 
Russellc said:
Are you still recommending the low sensitivity version for those LE14A users that are combining that with the B&C DE 250?
Click to expand...
Yes.

I have a pair of my own on the way, and will verify that they are indeed more sensitive in this combination.... :yes:
 
Bauhausler said:
Personally, I think this is the most useful discussion thread I've ever come across. Both for the specific build project and for all of the associated theory and practical speaker building information. I've learned more doing this project that probably all of my previous soldering iron fumbling with speakers in the past put together.
Click to expand...

I Agree 100%, a wonderful contribution, and while many are put off by the sheer size, I cant think of another single source with anywhere near the value that is here.:thmbsp:

Russellc
 
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