Projects
of Interest
Member Project
Links
Mike McCall/Shamrock Audio
System plans:
Eilish
(requires
Adobe Acrobat reader)
Keelin
(requires
Adobe Acrobat reader)
These are two of Mike's designs for Shamrock Audio. Originally sold
commercially, he has generously released them as free plans
for DIYspeakers List members.
Geoffrey Dillon
System plans:
Ego
(requires
Adobe Acrobat reader)
Metaphor
(requires
Adobe Acrobat reader)
These are two of Geoffrey's renowned designs. Originally sold
commercially, he has generously released them as free plans.
Originally supplied as Microsoft Word .doc files, I have converted
them to .pdf files for maximum portabilty.
Carlos Lorenzo
Driver offset/crossover spreadsheet:
download
(requires Microsoft Excel)
Carlos's spreadsheet tool models the frequency response
summation of any two-way crossover or two-way section of a
higher-order crossover. The driver separation, type, order and
frequency of the high- and low-pass sections (independently
variable) are adjustable, as are the drivers' polarity.
Ray Wagner/Justus Verhagen/Jean Claude Gaertner
B&G NEO3/NEO8 Plots:
Ray's Response
Plot
Justus'
Plots
Jean Claude's Plots
Ray Wagner TangBand 28-847SA Tweeter (Parts Express)
Response Plots:
These are curves of the recently discussed TangBand 28-847SA tweeter
available at Parts Express. One is the frequency response of the
2 samples I have on hand. The large dip at ~3500 is mostly an artifact
of the baffle I measured on (a rougly 4"x4" piece of wood
mounted to a 20"x20" baffle which is flush mounted in
a wall). The other curve is this tweeter teamed with a carbon fiber
coned 6.5" from a Chinese OEM house (Hornsonic). The crossover
point is around 3kHz with the tweeter being a straight 2nd order
and the woofer being 3rd to kill off a breakup peak quickly. The
1kHz dip in this curve is probably edge reflection but I haven't
had time to play with it yet.
2 samples on same graph
Tweeter with 6.5 Cone
Steve Houlihan - SoCal Gathering Photos
Main Room
Downstairs
High Efficiency Room
Jeff Keyes/Steve Sedmak - Vifa DX25 Tweeter Response Plots:
Steve's Response Plots
Jeff's Response Plots
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