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Multi-Way Conventional loudspeakers with crossovers

Smallest Footprint Horn and Driver that can reach 500hz
Smallest Footprint Horn and Driver that can reach 500hz
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Old 24th September 2018, 12:24 AM   #191
Ro808 is offline Ro808  Netherlands
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The K510 or K402...
are on top of my wishlist (too)

I am seriously considering to build a clone, somewhat bigger than the 510.

A clue for the horizontals (the sidewalls), albeit undersized for the throat:
Attached Images
File Type: png horizontal-tractrix-curve.png (125.4 KB, 140 views)

Last edited by Ro808; 24th September 2018 at 12:28 AM.
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Old 24th September 2018, 12:57 AM   #192
Ro808 is offline Ro808  Netherlands
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And here's another clue
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Old 24th September 2018, 01:22 AM   #193
Ro808 is offline Ro808  Netherlands
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The 510 and 402 are waveguides, primarily because of the high expansion rate.
The throat section has got very little, if anything, in common with OSWG's.
It's more akin to JBL's Image Control Waveguides, only......different.

However, I wouldn't be surprised to discover that JBL engineers were "inspired by Klipsch" during the development phase of their latest waveguides.

Last edited by Ro808; 24th September 2018 at 01:37 AM.
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Old 24th September 2018, 01:38 AM   #194
LORDSANSUI is offline LORDSANSUI  Brazil
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Quote:
Originally Posted by Ro808 View Post
It depends on the horn and the Phenolic driver, is this a Selenium or old JBL?
The phenolic one could be the Selenium D405. It can do 110dB 1W/1m at 500Hz slop at 12dB/oct, probably with 24dB/oct it can play at 300Hz

below the datasheet link in english

https://www.jblpro.com/ProductAttach..._SpecSheet.pdf

I'm curious about the results, I never did this alignment but in theory it work and has high efficiency.

If I had bass reflex subs, I probably would try mid with phenolic and high with TI, it would save some power amp.
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Old 24th September 2018, 01:43 AM   #195
EarlK is offline EarlK  Canada
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Quote:
Originally Posted by Ro808 View Post
And here's another clue
Smallest Footprint Horn and Driver that can reach 500hz-clue-jpg

Must be a "Protestant" horn

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Old 24th September 2018, 02:00 AM   #196
Ro808 is offline Ro808  Netherlands
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I would rather mark it as "ecumenical"
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Old 24th September 2018, 02:11 AM   #197
EarlK is offline EarlK  Canada
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Quote:
Originally Posted by Ro808 View Post
I would rather mark it as "ecumenical"
Good Answer!

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Old 24th September 2018, 02:12 AM   #198
Ro808 is offline Ro808  Netherlands
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Quote:
Originally Posted by LORDSANSUI View Post
The phenolic one could be the Selenium D405. It can do 110dB 1W/1m at 500Hz slop at 12dB/oct, probably with 24dB/oct it can play at 300Hz
Search: "Bob Crites Cornscala".

Mid and HF drivers in this project are: JBL Selenium D405 and D220Ti.

With a -3 to -6dB slope towards the top-end, the D220Ti probably won't yell above the "smooth" midrange.

Last edited by Ro808; 24th September 2018 at 02:26 AM.
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Old 24th September 2018, 03:13 AM   #199
Ro808 is offline Ro808  Netherlands
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With regards to the "smooth" midrange: provided you don't push the D405 too low.
500Hz seems already close to the limit and this will only work with a horn that's big enough.
The above applies under the assumption that the speakers will be used at home and not for PA.
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Old 24th September 2018, 04:17 AM   #200
Ro808 is offline Ro808  Netherlands
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The Community M200 might be a better midrange driver, but apparently these are hard to find.
It's got a Mylar diaphragm which should go nicely with a Mylar domed B&C or similar driver on top.

Last edited by Ro808; 24th September 2018 at 04:29 AM.
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