Zilch's AK Design Collaborative - Econowave Speaker
- Thread starter Zilch
- Start date
Russellc
Addicted Member
Russellc
Addicted Member
castlesteve
New Member
Zilch,
I picked them up from Ebay for what i think is a song. See this link:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140349654815&ssPageName=ADME:B:BCA:US:1123
I removed the front grills which seem to be some sort of plastic latticeas they were loose and would have buzzed while playing. The new baffles are 1" mdf and are floating between 2 gasketed surfaces. I used mounting blocks from behind and pulled the baffle into place with clamps to get it tight. I also added a 2 by 4 brace in each using your simpson idea. The interior walls are covered with polyfill batting from wallmart and the ports are the precision ports with the large flare. Interior volume appears to be 4.75 cu ft.
Thanks for the project it has been great fun. I`m now embarking on a 3rd set for the upcoming 6v6 amp competition which will require greater efficiency than the Le14s can deliver. I am looking at the Eminence Kappalite 3012 or 3015 range for my woofers and the QSC waveguide with the B&C DE250 drivers. I`ll lose a little bass but the efficiency will be right up there.
Cheers, Steve.
Bauhausler
Rational Subjectivist
castlesteve
New Member
Nice work. What's the upper cabinet with the waveguide in it? Is that hand built?
Thanks,
yes the upper cabinet is made from no.1 pine from the depot. I just mitred the corners and used the tape it up method to put it together. Then stain and tung oil and Bob`s your uncle as they say.
rvsixer
New Member
Baffle width, etc.
I am having trouble finding donor cabs, and have small room placement issues, so am contemplating building the slimmest possible cabinets for my econowave project.
I'm a DIY speaker novice, but have been studying "standard" DIY designs and know they are affected by baffle width changes, and use BSC to deal with boundary/placement issues (generalizations for the sake of brevity). How critical is baffle width on the e'wave, and are they as affected by boundary placement as standard speakers (the layman in me says no due to the CD aspect)?
I am thinking Dayton 10" DC250-8 Classic woofer in a ~2cuft vented box, 11.5"-12.0" wide with 3/4" roundovers on both edges. Seperate waveguide/driver assembly to be placed on top of the woofer box. Woofer will be mounted as high as possible to minimize compression driver/woofer center distance.
All thoughts and guidance welcomed!
Rob
I am having trouble finding donor cabs, and have small room placement issues, so am contemplating building the slimmest possible cabinets for my econowave project.
I'm a DIY speaker novice, but have been studying "standard" DIY designs and know they are affected by baffle width changes, and use BSC to deal with boundary/placement issues (generalizations for the sake of brevity). How critical is baffle width on the e'wave, and are they as affected by boundary placement as standard speakers (the layman in me says no due to the CD aspect)?
I am thinking Dayton 10" DC250-8 Classic woofer in a ~2cuft vented box, 11.5"-12.0" wide with 3/4" roundovers on both edges. Seperate waveguide/driver assembly to be placed on top of the woofer box. Woofer will be mounted as high as possible to minimize compression driver/woofer center distance.
All thoughts and guidance welcomed!
Rob
Hey Rob, don't know if you looked though all the stuff but there are small waveguides that would work well with your build. Have you thought about the parts express knockdown kits.
Here is a kit that could work. You would not use the tweet and just mount the small waveguide on top of the cab. Maybe some of the crossovers parts could work for the eWave crossover as well.
http://www.parts-express.com/pe/pshowdetl.cfm?&DID=7&Partnumber=300-702&ctab=1#Tabs
Here is a kit that could work. You would not use the tweet and just mount the small waveguide on top of the cab. Maybe some of the crossovers parts could work for the eWave crossover as well.
http://www.parts-express.com/pe/pshowdetl.cfm?&DID=7&Partnumber=300-702&ctab=1#Tabs
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Bauhausler
Rational Subjectivist
Dunno about the BSC issues. The Dayton drivers look like good candidates and a number of people have used them. The PH612 WG is 11.9" wide. Home Depot has a variety of pre-cut 3/4" MDF, plywood and lumber panels that can be hacked together into cabinets with minimal cutting by the carpentry challenged.
I'd say go for it if it's within your means and abilities. Of all of the ewaves built I recall one (1) person not being thrilled with the results.
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Bauhausler
Rational Subjectivist
Family in town today, so I can't attend. Bummer, because I have a copy of the Make magazine with the Ewave article that I was going to show off. Also I was going to drag along my cheapo DIY chip amp that I built last month. It turned out well and sounds ridiculously good. I'm running it now on my desk with B&W LM1 speakers and a Chumby internet radio for a source.
Tell everyone 'hi' and give George some s**t for me just on principle.
"give George some s**t for me just on principle. " hell, that's easy enough. I found a place were I can punch all the holes for the top plates for the GM70 amp. I am going to start doing that in one month. Things are getting a little better around here....thank God.
Did you see the chip amp (I think it is a chip amp) at PE? Very inexpensive and reminded me of yours.
Did you see the chip amp (I think it is a chip amp) at PE? Very inexpensive and reminded me of yours.
Bauhausler
Rational Subjectivist
I was JUST looking at the new PE catalog hoping they dropped the price on teh trap cabs. That's a T-amp board. It's 86% efficient vs 50% for the analog chips but it's a much more difficult build if you do it from scratch. It's not a challenge if you use their pre- assembled board! ;-)
The trap cabs are still listed and the same price.
DE250s are on sale for $110. Lots of woofer deals.
Anybody on the fence about ewave, PE just dropped the price of admission for decent woofers.
That's quite a good idea, Dennis.
[I'll call it something else, tho.
]I should certainly say so, they are gorgeous!
We look forward to seeing your next build posted here.
You've got it figured well. There is baffle step compensation built in the standard eWave lowpass filter. It is generic, and you may wish to adjust the component values to optimize for your cabinet design and placement. Normal rules regarding boundary reinforcement apply independent of the cab size.... :yes:
rvsixer
New Member
That's quite a good idea, Dennis.
[I'll call it something else, tho.
In a former much too expensive hobby of mine, those who went on to build a second or more examples were termed 'repeat offenders'.
That clears up a few things for me. I'm afraid at this point understanding and redesigning crossovers is beyond my ability. From the many satisfied e'wavers here, with wildly varying baffle widths and placement, it seems the standard xover covers most situations very well.
I have recently acquired room/speaker measurement equipment. I think I will stick to the standard xover, and get some measurements before delving into design & changes.
Thanks everyone for the tips and hints so far :thmbsp:.
Rob
ROSSO
Active Member
"bankrupt" in mine...:yes: This is my only hobby that doesn't require a helmet though...
Do you have particular suggestions, or is it just the notion that they have some sale prices? I'm getting the itch, although from speaking with Dave at JBL Parts, it may be a while until the waveguides are in. - Pat
Steve O2
Active Member
You all should really consider trying the Selenium D2500TI-ND
I tried the foam deally, and a bunch of other stuff with the D220TI. It sounds good but it's too metallic sounding to me...
The D2500TI-ND is smoother:yes:
Ziltch I think you said you ordered some, have you had a chance to try it?
I tried the foam deally, and a bunch of other stuff with the D220TI. It sounds good but it's too metallic sounding to me...
The D2500TI-ND is smoother:yes:
Ziltch I think you said you ordered some, have you had a chance to try it?
Yes, I like them, particularly their smaller size and lighter weight.
With respect to how they sound, they both use the same diaphragm, but from the specs, D2500Ti-Nd is lower distortion. Unless D220Ti has a shorting ring, the Nd magnet material might account for that.
In any case, I'll have to set up a direct A/B comparison before concluding anything with respect to their sonic qualities....
