Carver Amazing Platinum Mark IV

I owned a pair for a number of years. Stock version. No mods. They are excellent speakers. The ribbons, obviously, must be functioning properly to sound their best. If they start buzzing then look out. Also add some mass to the base of the speaker and put a tube preamp in front of a very high power amp. Carver amps? Maybe. I would say more like a Pass 350.5....

I own a pair of the original Carver Amazing Loudspeakers.
I love them. Excellent sounding speakers, if you have the amplification.

Much better bass and highs than my Magnaplanar MMG's and less colored through the mids.

Two biggest contentions about those is the expensive amplifier requirements for relatively inexpensive speakers and the open baffle, high Q bass drivers which were, let's say, ahead of the technology.