Anyone know this old plan? huge 3 way top

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   Hi All,

I bought these speakers over a decade ago off an old guy who built them.
Laminated curves and stuff, was a complicated build he told me.
He said the plans were from a magazine from the 70's and thought it were RCF plans.

https://www.dropbox.com/scl/fi/3qkkpwo6vfuekpztuf5if/IMG_20240414_123927063_MFNR.jpg?rlkey=9auvau7jlu08kzqkgirtqoss5&st=vya2var6&dl=0

https://www.dropbox.com/scl/fi/5rds2413hpy4h7kizmg47/IMG_20240414_123939364_MFNR.jpg?rlkey=ebnx1yrde5l7gwlr7k3zesjr8&st=s7xavy2w&dl=0

Now I always wondered what they are, original specs/ drivers, ...
He placed other speakers in them so no guide there.
It's a 12", 10" and the tweeter.
Active filter 800Hz between the 12" and the 10"+tweeter (have a passive filter, freq unknown)

(cant seem to get the pictures or hyperlink to work the way I want with the BBcodes)

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Jan-2T Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 18 October 2024 Location: Belgium Status: Offline Points: 137	Post Options Post Reply Quote Jan-2T Report Post Thanks(0) Quote Reply Topic: Anyone know this old plan? huge 3 way top Posted: 07 November 2024 at 9:01am
	Hi All, I bought these speakers over a decade ago off an old guy who built them. Laminated curves and stuff, was a complicated build he told me. He said the plans were from a magazine from the 70's and thought it were RCF plans. https://www.dropbox.com/scl/fi/3qkkpwo6vfuekpztuf5if/IMG_20240414_123927063_MFNR.jpg?rlkey=9auvau7jlu08kzqkgirtqoss5&st=vya2var6&dl=0 https://www.dropbox.com/scl/fi/5rds2413hpy4h7kizmg47/IMG_20240414_123939364_MFNR.jpg?rlkey=ebnx1yrde5l7gwlr7k3zesjr8&st=s7xavy2w&dl=0 Now I always wondered what they are, original specs/ drivers, ... He placed other speakers in them so no guide there. It's a 12", 10" and the tweeter. Active filter 800Hz between the 12" and the 10"+tweeter (have a passive filter, freq unknown) (cant seem to get the pictures or hyperlink to work the way I want with the BBcodes)

Jan-2T Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 18 October 2024 Location: Belgium Status: Offline Points: 137	Post Options Post Reply Quote Jan-2T Report Post Thanks(0) Quote Reply Posted: 13 November 2024 at 10:16am

	Music!

Bams Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 08 April 2009 Status: Offline Points: 679	Post Options Post Reply Quote Bams Report Post Thanks(0) Quote Reply Posted: 13 November 2024 at 10:48am
	in the 70's and 80's many companies shared free plans in the hope people bought their speakers. this is propably one of their more complex concepts. never seen one though so cannot help you any more. placing of the tweeter seems a bit odd. no crossovers with information to help you out?

teeth Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 05 July 2021 Status: Offline Points: 762	Post Options Post Reply Quote teeth Report Post Thanks(0) Quote Reply Posted: 13 November 2024 at 11:39am
	tweeter definitely retrofitted

Jan-2T Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 18 October 2024 Location: Belgium Status: Offline Points: 137	Post Options Post Reply Quote Jan-2T Report Post Thanks(0) Quote Reply Posted: 13 November 2024 at 12:05pm
	yep a botch job on the retrofitted tweeter btw... I'll look for the best way to find speakers specs for an unknown cabinet... Or would I better start looking for something else to go on top of 3x startec H/R118 and 1x Martin Fake2B stack...
	Music!

Earplug Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7752	Post Options Post Reply Quote Earplug Report Post Thanks(0) Quote Reply Posted: 13 November 2024 at 1:36pm
	What drivers do they have? That may be a clue - or at least help you decide what to do with the cabs. Do they sound any good? And could (vaguely) be an ASS design - altho' finish looks a bit rough.
	Earplugs Are For Wimps!

jazomir Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 20 November 2006 Location: Sunderland UK Status: Offline Points: 1759	Post Options Post Reply Quote jazomir Report Post Thanks(0) Quote Reply Posted: 13 November 2024 at 5:54pm
	Could it be a modified EV MTH2? There are a few similarities - even using Google Lens - it would have been a reasonably simple mod to double up the low mid section especially as EV used to supply plans back in the day.
	For sidefills, can we have two enormous things of a type that might be venerated as Gods by the inhabitants of Easter Island, capable of reaching volumes that would make Beelzebub soil his pants.

Pinheiro Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 February 2004 Location: Portugal Status: Offline Points: 325	Post Options Post Reply Quote Pinheiro Report Post Thanks(0) Quote Reply Posted: 13 November 2024 at 7:01pm
	Hi all not the same but all most KKKKK http://hornplans.free.fr/pas1ma1.html

Jan-2T Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 18 October 2024 Location: Belgium Status: Offline Points: 137	Post Options Post Reply Quote Jan-2T Report Post Thanks(0) Quote Reply Posted: 14 November 2024 at 7:59am
	They are 50cm in front I remember, I had them stacked on punishers with same width kick inbetween. Tonight I'll open them up and check what's to find on the inside
	Music!

Bams Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 08 April 2009 Status: Offline Points: 679	Post Options Post Reply Quote Bams Report Post Thanks(0) Quote Reply Posted: 14 November 2024 at 9:56am
	Check the crossover, drivers and inside of the cabs for marks and information. Most smaller builders leave such traces. Like “reconed 1987 eglantier” which would point to an early AED service.

Earplug Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7752	Post Options Post Reply Quote Earplug Report Post Thanks(0) Quote Reply Posted: 14 November 2024 at 10:36am
	Yes, you never know. There might be some treasure in there -- like an old Gauss, or ATC driver. Worse bodge in the world is that tweeter.
	Earplugs Are For Wimps!

Jan-2T Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 18 October 2024 Location: Belgium Status: Offline Points: 137	Post Options Post Reply Quote Jan-2T Report Post Thanks(0) Quote Reply Posted: 14 November 2024 at 11:03am
	I had them open when i bought them, was fitted eminence or something if i remember correct, was +10y ago so... Were no original drivers seller told me.
	Music!