What about the 'in room power response' that the AR is supposed to be so good at? Or, does it not really matter as much? I guess I'm wondering about the polar response of the high end. Do these sound best on-axis? Does the high end fall off when off-axis?
Zilch's AK Design Collaborative - Econowave Speaker
- Thread starter Zilch
- Start date
What about the 'in room power response' that the AR is supposed to be so good at? Or, does it not really matter as much? I guess I'm wondering about the polar response of the high end. Do these sound best on-axis? Does the high end fall off when off-axis?
Duffinator
Spin The Black Circle
The LE14's are capable of bass the AR3's only dream of. The ECW with the LE14's will leave the AR3's in another county. The off axis response is excellent.
GO!!
LE14 is an uber-favorite woofer here, and Jackgiff designed a lowpass filter specifically for that driver, which is documented earlier in this thread, along with EconoWave performance measurements using it.... :thmbsp:
They are constant directivity and will smoke any conventional design with respect to uniform power response. Here's EconoWave's horizontal polar response as measured in 7.5° increments by Earl Geddes.
Yes, THAT Earl Geddes....
:Light blue is 30° off-axis. You can see the high end does not begin falling off appreciably until outside the 90° controlled dispersion window, as per the spec:
May we hear a "Holy CRAPOLA!" now, Packrat?
:Attachments
dnewma04
The Healer
At least you aren't calling it a subwoofer anymore. :tongue:
The ferrite versions make some of the best medium-power subwoofers available.
They also happen to play up to 1+ kHz rather nicely....
http://audioheritage.org/vbulletin/showthread.php?t=11317
They are amazingly versatile drivers; JBL misapplied them in some vintage designs, where they got a bad rep for "muddy midrange." Yeah, they don't play real well at 2 kHz. DUH!
Alnico LE14As make delicious low-power subs. They just don't have the power handling and low distortion of the later ferrites with their improved motor structure....
Duffinator
Spin The Black Circle
:lmao::lmao::lmao:
You guys sure know how to beat up on the Zilchster....
ity:
dnewma04
The Healer
You guys sure know how to beat up on the Zilchster....
It's all in fun, Zilch.
For a cheap subwoofer, I like the AE speakers IB15 or better yet 4 of them (100.00 each) in an IB subwoofer.
The Tempest-X from Exodus Audio has a massive excursion advantage and isn't much more than an LE14. The Original Adire Tempest on the used market should make a great low budget option. The Dayton "clone" of it is another great budget option. Lot's of inexpensive drivers will walk all over an LE14 in subwoofer duty. Not many play well up to 1khz, though.
dnewma04
The Healer
PE waveguide with what driver, Denny? EWG crossover will work with Selenium D210/220 and the PT Waveguide, I wouldn't expect it to be transferable to another waveguide type. Nevermind the first question, I found the eminence ASD1001.
Nice looking cabinets, though. What is in them?
Nice looking cabinets, though. What is in them?
skywave-rider
Slumming in Akihabara
djnagle,
Thanks, yes, now I remember you posted that earlier. Looks cool! I'm living vicariously through your work
Thanks, yes, now I remember you posted that earlier. Looks cool! I'm living vicariously through your work
Djdude, do you not see that response is terrible?
They need 10+ dB of compensation; the upper mids will be all "shout" without that.... :yes:
At least put a simple R||C compensation filter in series with them like Tom Brennan uses on his Altecs. Probably $10 for the pair, max.... :yes:
I believe we've got the E'wave filter costs fairly well minimized. In any case, as Dave points out, it's specific to the E'Wave driver/waveguide combination.
Try 6.2 uF in parallel with 8 Ohms, the combination in series with your compression driver, and see if that doesn't tame them considerably.... :yes:
Cool! That's the first thing I tried when working with the Seleniums in Post #1 of this thread. See the green curve here:
http://audiokarma.org/forums/attachment.php?attachmentid=80289&d=1203832069
Looks like a cap as low as 3 uF might have been even better.... :thmbsp:
Interesting.
I see the violet curve is the M19 curve. I just tweaked the bottom of my homemade copy and removed the L-pad and cut the inductance back to 3.0 uH on the woofer circuit and i sound a lot better. All the models Kegger and I looked at last night had way less than 5.4 uH of inductance for 1200 and gave around 850 hZ as the crossover point for 5.4. Maybe that's why they sounded lacking.
I'm going to try to whip a 95 dB+ 1200/3000 hZ crossover like Jack used later on tonight and see how that goes; everything seems to indicate it's a goodie!!
I see the violet curve is the M19 curve. I just tweaked the bottom of my homemade copy and removed the L-pad and cut the inductance back to 3.0 uH on the woofer circuit and i sound a lot better. All the models Kegger and I looked at last night had way less than 5.4 uH of inductance for 1200 and gave around 850 hZ as the crossover point for 5.4. Maybe that's why they sounded lacking.
I'm going to try to whip a 95 dB+ 1200/3000 hZ crossover like Jack used later on tonight and see how that goes; everything seems to indicate it's a goodie!!