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Showco Pyramid 900 disco speakers.

Printed From: Speakerplans.com
Category: Other Chat
Forum Name: Golden oldies
Forum Description: Post all historic interesting items, stories and photos here (no, not your Nan)
URL: https://forum.speakerplans.com/forum_posts.asp?TID=109012
Printed Date: 26 March 2026 at 7:09pm
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Topic: Showco Pyramid 900 disco speakers.
Posted By: jbl_man
Subject: Showco Pyramid 900 disco speakers.
Date Posted: 29 March 2025 at 9:27pm
Here's a rare old thing, Showco horn speakers from the late 70's.

Each one is a large cube, with a folded horn bass section with a rear-facing Electrovoice EVM-15b. and four 4-inch mid drivers(look like JBL, but can't be sure) crossed at 800hz and a pair of peizos for hf above 5k.











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Be seeing you.



Replies:
Posted By: KDW32
Date Posted: 29 March 2025 at 9:35pm
Oooooh wtf you can see what they are trying to do there. But erm. Wtf ! 😎 Mad. I would love to hear one!


Posted By: Daniel S
Date Posted: 30 March 2025 at 10:30am
I'm almost getting Danley vibes here. Geek

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Distortion is evil


Posted By: jbl_man
Date Posted: 30 March 2025 at 11:04am
Here's another photo. In this one they have stuffed a couple of rectangular piezos in instead. Smile




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Be seeing you.


Posted By: monkeypuzzle
Date Posted: 30 March 2025 at 12:36pm
Looking at the old peddle powered Singer sewing machine in one of the first pics, they’re pretty big!

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blah blah blah blah blah......


Posted By: VECTORDJ
Date Posted: 31 March 2025 at 1:17am
A+    Maybe replace the PZTs with Real Bullets and X-over????


Posted By: doller
Date Posted: 31 March 2025 at 10:33am
How low did they go?
I just love these old speakers. Thank you, Ian.
I made something not too far off only went down to 110hz at best. 


Posted By: jbl_man
Date Posted: 31 March 2025 at 12:56pm
Well according to the spec Dom, down to 40hz! LOL

But i don't believe a word of it. Some wishful thinking when they wrote that. Yup, think you are right, realistically can't see this doing anything below 100hz? 




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Be seeing you.


Posted By: njw
Date Posted: 31 March 2025 at 9:08pm
 It seems they're a bit confused as to what size the voice coils actually are on the mid range woofers too...


Posted By: BJtheDJ
Date Posted: 31 March 2025 at 11:48pm
Originally posted by njw njw wrote:

 It seems they're a bit confused as to what size the voice coils actually are on the mid range woofers too...


Make your choice ~~  3/4''  or 25.4Mmm  :)




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I started out in this business with nothing.
I still have most of it left.


Posted By: doller
Date Posted: 01 April 2025 at 7:10am
Sorry Ian did you ever get that amp? 
Thanks for the spec sheet upload. 
Maybe VC internal and external could be a fat one.
Love that too.


Posted By: jbl_man
Date Posted: 01 April 2025 at 8:15am
Hi Dom, nope, i phoned the fellow a couple of times, left messages on his voice mail, no-one ever got back to me. Very odd. 

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Be seeing you.


Posted By: doller
Date Posted: 02 April 2025 at 1:20am
PM sent Ian


Posted By: BigSoundNorthWest
Date Posted: 19 April 2025 at 8:12pm
Originally posted by monkeypuzzle monkeypuzzle wrote:

Looking at the old peddle powered system singer sewing machine in one of the first pics, they’re pretty big!

Didn't notice til u said.
Wow.
Still, bet they at least sounded reasonable..




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