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
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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.      ------------- 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.  ------------- 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.   ------------- Be seeing you. |
Posted By: monkeypuzzle
Date Posted: 30 March 2025 at 12:36pm
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Looking at the old peddle powered Singer sewing machine in one of the first pics, they’re pretty big!
------------- 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
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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.
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Posted By: jbl_man
Date Posted: 31 March 2025 at 12:56pm
Well according to the spec Dom, down to 40hz!  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?  ------------- 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
Make your choice ~~ 3/4'' or 25.4Mmm :) ------------- I started out in this business with nothing. I still have most of it left. |
njw wrote:Posted By: doller
Date Posted: 01 April 2025 at 7:10am
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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.
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Posted By: jbl_man
Date Posted: 01 April 2025 at 8:15am
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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. ------------- 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
Didn't notice til u said. Wow. Still, bet they at least sounded reasonable.. |