Misc. driver distortion measurements

[eb15]

Here are some (poorly done) REW/jbox distortion measurements that
I did this morning to help me decide on some driver and crossover ideas.
I'm still a newbie at this...

hardware: jbox where supplied electret microphone was approx 1 meter away.
snell k cabinet used though some drivers didn't quite fit...

First up 8" woofers

dayton dsa215-8 8" designer series aluminum cone



dayton da215-8 8" aluminum cone



dayton rss210hf-4 aluminum cone




10" dayton dsa270-8 designer series aluminum cone sticking out an inch or two from 8" woofer hole.




5" dayton dsa135-8 designer series aluminum cone, not quite fitting into a smaller type M cabinet on top of type k box


next up assorted tweeters for a 2-way

seas 19tff1 3/4"



peerless d19td05 3/4" (purchased recently through parts-express.com)


sb acoustics sb19st-c000-4 3/4"


sb acoustics sb26st-c000-5 1"


peerless bc25tg15-04 1"


dayton dc28f fabric dome


dayton old rs28a aluminum dome

[eb15]

Mods you can move this.
I didn't realize there was a driver testing sub category

[eb15]

Started project to rebuild a snell type m cabinet with current drivers, and crossover parts.
An initial Type M redesign. Snell Type M cabinet is 7.5-in wide 11-in tall 5.5-in deep.
driver rebates need rework to fit new new drivers.
dayton designer series 5" aluminum cone woofer
sb acoustics SB19ST tweeter

2-way crossover in the style of Peter Snell's original type k, e, etc. speakers.
12dB/octave electrical around 2500Hz. Low parts count. (no zobels, etc.)
Woofer crossover has some baffle step compensation. (the slope between 200Hz and 1000Hz)
Recommended parts: solen 16ga air core inductors, clarity cap pur caps, mundorf m-resist 20W resistor.

[eb15]

Snell K bookshelf speaker rebuild with the inexpensive Dayton DA215 aluminum cone woofer and seas 19tffc 3/4" tweeter.
I prefer the seas 3/4" here to the current peerless D19. worth the upgrade cost here replacing aged and slightly defective tweeters.
Using original inductors. Replace electrolytic cap stacks with Jantzen Z-standard 10uF.
The relatively inexpensive Jantzen Z-standard caps works extremely well here.
A preferred balance of sonic characteristics with these drivers, and convenient size, standard solid core leads, etc.
Change out adjustable resistor in tweeter circuit to Mundorf MResist 20W fixed 8.2ohm wired after inductor.