Well, the Audiobahn A1502DP is advertised as 450W X 2 into one-ohm loads,
but I've never used one, so I can't vouch for either the quality of the amp
or the accuracy of the ratings.

I think the problem you're going to run into is that the combination of
1000WRMS total power in stereo mode *and* 1-ohm stability is pretty rare.
The widespread availability of one-ohm amps is a relatively recent
development, and most of the manufacturers figure that the only thing
people will need 1000WRMS for is powering a subwoofer, so that's why you
see so many mono amps in that range but hardly any stereo amps.

What are you wanting to power with this amp?

Scott Gardner

The old Rockford Fosgate punch amps were 1 ohm stable (I know this from
experience).

-Ken

I think the older Kicker ZR series went to 1 ohm in stereo.  If they didn't,
they sure could have - much like those Rockfords that were mentioned.

ESX Quantum series could go down to 1 ohm in stereo too.

Both had class AB amps that will deliver 500 watts per channel.  However,
neither of them are made anymore.

older stuff

PG MS series amps
US AMPS.
perhaps an Orion HCCA.
How bout a SS Rubi 1000?
and of course the older rockford punch series.

FHLH.... older amps RULE.