I know were are talking about absolute "reference" level speakers and components here, but I'm surprised that with this many suggestions and responses so far, no one has recommended simply trying
Paul Speltz Zero Autoformers to increase the impedance seen by Llyod's amplifiers.
They can be used to
double, or even
quadruple, the load seen by the amplifiers. As a result, amps that "run out of steam" may often handle previously impossible speakers without breaking a sweat. In many, many, systems, insertion of the Zeros not only remove the impedance issue, they are undetectable from a sonic standpoint. Give the
FAQ a read.
Not saying they are guaranteed to work in every situation, or even this particular one, but for $450 in the naked version and $950 in the boxed, it is a far cheaper, and easier, experiment than all the fantastic amps being suggested. And even high-powered tube or solid state amps can still benefit from seeing a higher impedance.
I know this sounds like an ad, but I haze no connection to the company, professional, financial, or otherwise. Just passing on a little suggestion from the world of high-efficiency speakers/low-power SET amps and OTL amps.