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Carver Amazing Platinum Mark ii

  • Thread starter Deleted member 5017
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Deleted member 5017

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I discovered ASR a few weeks ago, and after using a UMIK and REW, I thought others would appreciate some info regarding these Plats.

I'll be posting response curves, waterfall, etc as I finalize my (untreated) room EQ...

For now, here are some views of these old monsters.

The front of the right speaker. The silver strips on the left are the aluminum strips (4 of them) 5' long, surrounded by ceramic magnets. After about 35 years of aging, the glue holding the magnets in place began to fail, and when I was replacing the suspension rings, one came loose and partially tore through the left sides ribbon. Thank God for the Circuit Writer pen! The four vertically-aligned 12" woofers hide behind the cloth panel.

Carver_front.jpg



The view from the rear. Bob Carver's genius moment came when he realized that a very low Q woofer's low-end response would RISE, allowing a great-performing woofer to exist.

Carver_rear.jpg



The Mark IV version included a single-piece ribbon section, and tone controls:

Carver_eq.jpg



I am driving these speakers with two, bridged-mode Adcom 555's which supposedly can supply up to 800 watts per channel into less than 8 ohms. The speakers have very low distortion at very loud levels. It's an odd effect when 15-30 Hz tones jiggly your intestines!
 
Here are some data from Room EQ Wizard (REW).

Frequency response after parametric EQ from EqAPO/Peace:
carver l r full eq.png
 
Waterfall from the left speaker:
carver left no eq waterfall.png
 

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My room layout, and reverberation nodes:
(There's a half wall extending from the left to just past the listener's head on the right. The ceiling is a peak at 12' high).
room nodes.png
 
I had a pair of the original ALS models that I bought in 1992 that had been updated from dual 30" ribbons to single 60" ribbons and new crossovers. They were a pain to position, lots of experimenting, but they were fun to listen to for the decade I owned them.
 
I have one of the last pairs manufactured. Maybe April 1994. (in storage)
Now the problem is replacing the unusual woofers.
 
I have one of the last pairs manufactured. Maybe April 1994. (in storage)
Now the problem is replacing the unusual woofers.
What's wrong with them, bad surrounds? I know there's kits to refoam them, and also see woofers listed on ebay regularly.
 
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