I was in Montreal, a few years back, and visited the Tenor Audio factory. Robert Lamarre gave me a demo on both his Lamhorn 1.8c, and a Kharma version ($60,000.00). The speaker wire he used in his demo room was a thin, unshielded, teflon coated 6n copper wire, simple. Robert, being at the manufacturing end, only smiled when I asked why he didn't use 'proper' speaker cables. Does he know something the rest of us don't.
I spoke with Mr. Gilmore, of Gilmore audio, ex. Atma-Sphere employee/owner. He suggested I get a few lengths of Transformer wire. Varying guages, and seperate the + and - as much as possible. This was to diminish capacitance?, inductance?. This worked, I sold my Cardas and Acoustic Zen. This is what I have been useing.
Your Lamhorns, being very efficient, would probably work best with a thinner speaker wire. Look at tonearm wire as an example. Because the signal is small, a thinner wire maintains purer harmonics, I think. Goertz recommends smaller guages of their wire for smaller amps, and only recommends their larger guages for hich powered amps.
Am I rambling?.
I too am looking at the Lamhorn 1.8c, likely with the MDB3 driver.
LOL