Driving 1 ohm

Thanks Simon !

Rwwear, not very loud, we can still speak at normal level while playing music. Most of the time, below half the volume dial on the preamp. But.......even at a moderate volume level, on good recordings, the bass level will drop at a point that a vibration sometimes continuous, can be felt. Those speakers are really something else now. And it is specifically that kind of effect that makes me cautious about the amp.

Well, depends.
Ask CJ if your amp is rated down to 1 Ohm &/or meant to drive 1 Ohms loads. Most amps in the market are not & even if they are, they sound like crap!
If it's rated down to 1 Ohm & meant to drive 1 Ohm then CJ should have provided adequate heat-sinking & an able power supply.
Otherwise, the amp would clip & the power transistors would saturate thereby degrading them over time.
Further, there are 1 Ohm loads & then there are 1 Ohm loads. How benign is your 1 Ohm load? Is there lots of phase shift in the 200Hz - 8KHz region? If yes, then your amp is being pushed pretty damn hard. If there is minimal phase shift, say, 10 degrees, then your amp is not being pushed hard. It's still driving a very low impedance but it does not have to provide too much power/current to drive the reactive load in the speaker x-over.
The amp-speaker interface is dynamic over 20Hz-20KHz so there is no fixed answer - all depends on how "nice" your speaker is being to the amp. Plus, as Rwwear pointed out, how loud you are playing your music.

Check out FM Acoustics line of power amps.

Thanks Bombay,

Actually, I didn't ask CJ, but I saw a reply they gave a few years back to a same inquiry about an Evolution 2000. CJ answered it wasn't designed for 1 Ohm without beeing specific if it was damageable either. That is why I am first asking here.

Your giving me figures, I appreciate. I'll have to check it out with one of my buddies who is familiar with such specifications. But it doesn't clip, that is for sure. And it doesn't get very hot, but does this also means that I'm not overriding the power transistors.

I feel reassured about the answers, thanks to all !

The amps that state stable at 1 ohm advertise this fact. You will damage the speakers if phase shifts the cover off and you see flame. Or you buy the Organ and drum disc to see how your bass sounds. All of a sudden the amp become a source of red hot ballistic bits.
Get a Spectron Musician IV that is supposed to work well, so I am told, when presented with low impedance . Another choice maybe a refurbished, no plateau biasing, monster Krell.
I think the Sanders designed Coda style, OEMed Innersound (RIP) type amps all make this claim.
I had no idea they all sounded like crap. I live in happy never lower than 4 ohm speaker land which lets me use the tube amps of my choice.
Heck I have 2 pairs of vintage speakers 16 ohm nominal impedance. My modern tube monoblocks don't have a 16 Ohm tap. That's Okay My DA-60 doesn't either nor two other integrated tube amps . Don't fret my 1959, 1960, 1961 Sherwoods do. Now that I think about it since I don't own planars I doubt I have a speaker lower than 4 ohms .
I do know that only a couple of the SS amps sound like crap. That's because they lost a channel or two or are 90s stop gap crap.