EconoWave Summary
Design concept: An inexpensive ($188/pair) pre-engineered compression driver/waveguide/crossover high frequency section suitable for mating with various woofers to facilitate building DIY two-way speaker systems.
Compression Driver: Selenium D220Ti, thread-on version, 8 Ohms:
http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=264-270
Alternate Selenium D2500Ti-Nd, 8 Ohms. The same diaphragm in a more compact and lighter package particularly suited for use with smaller waveguides. More expensive than D220Ti:
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=264-274&FTR=264-274
Waveguide: JBL 1" thread-on Progressive Transition, Part# 338800-001, 90° x 50° dispersion pattern, flange dimensions 12" W x 6.5" H, 6.25" deep including D220Ti driver, 5.625" using D2500Ti-Nd, $9.90 each. Optional flange mounting gasket Part# 351577-001.
Alternate "Mini" PT waveguide for smaller projects, Part# 364914-001, 90° x 90° dispersion pattern, flange dimensions 6" x 6", 4" deep to rear of flange with D220Ti driver, 3.375" using D2500Ti-Nd, $6.00 each.
Also for smaller projects, PT-D95HF-1 waveguide Part# 364700-001, 90° x 50° dispersion, flange dimensions 8" x 8", 7.625" deep to rear of flange with D220Ti driver, 7.125" including D2500Ti-Nd, $14 each.
Order these JBL waveguides direct from JBL Pro Parts with credit card:
http://www.jblproservice.com/forms/parts_order1.html
Pyle Pro PH612 waveguide, equivalent to the larger 12" W x 6.5" H JBL product, is also available from Parts Express, part #292-2572:
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=292-2572
Dayton's clone:
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=270-318
Though unconfirmed, apparently also available in Australia from DJ City:
http://www.djcity.com.au/products/yd...07mm_1025.html
Crossover: Highpass filter with CD compensation for this specific driver/waveguide combination. Includes generic 1.2 kHz lowpass filter for 8-Ohm woofer, which builders should "fine tune" for the specific woofer used:
http://www.audiokarma.org/forums/attachment.php?attachmentid=151281&d=1242968714
Parts List: Three versions, one for each of three standard woofer impedances:
http://home.comcast.net/~dnewma04/EconowaveBoM.htm
Board Layout:
http://audiokarma.org/forums/attachment.php?attachmentid=133068&stc=1&d=1233530586
Printed Circuit Version:
http://www.audiokarma.org/forums/showthread.php?p=2636636#post2636636
Integral Input Crossover Mounting:
http://www.audiokarma.org/forums/showthread.php?p=2766696#post2766696
Variants: See text.
1) For high efficiency woofers above 95 dB/1W sensitivity, use this version of the highpass filter so that the L-Pad operates near the middle of its range:
http://www.audiokarma.org/forums/attachment.php?attachmentid=151282&d=1242968714
Note: May also be supplemented with a calculated fixed L-Pad to reduce high frequency driver sensitivity to a specifically desired level or adjustment range.
2) 900 Hz lowpass for JBL LE14A woofer:
http://www.audiokarma.org/forums/attachment.php?attachmentid=151339&stc=1&d=1243017683
3) Advice regarding passive biamping with tube amp HF:
http://audiokarma.org/forums/showthread.php?p=2416284#post2416284
4) Charge-coupled implementation of the standard circuit:
http://audiokarma.org/forums/attachment.php?attachmentid=101428&d=1217293889
5) Custom attenuation:
http://www.audioroundtable.com/PiSpeakers/messages/1278.html
http://www.audiokarma.org/forums/showthread.php?p=2238704#post2238704
Driver Polarity:
http://www.audiokarma.org/forums/showthread.php?p=2760384#post2760384
System Designs:
1) EconoWave "Standard" Kit:
http://www.audiokarma.org/forums/sho...67#post3383067
http://mail.audiokarma.net/forums/showthread.php?p=3383067#post3383067
2) EconoWave "Deluxe" Kit:
http://www.audiokarma.org/forums/sho...05#post3448405
http://techtalk.parts-express.com/s...x-Your-PCD-Mettle/page4&p=1626379#post1626379
3) Econowave 4x Kit:
http://www.audiokarma.org/forums/sho...77#post3843177
http://techtalk.parts-express.com/showthread.php?215536-Flex-Your-PCD-Mettle&p=1655955#post1655955