I think they can be rewired. They will sound better in triode mode, so I was led to believe. I presume your Tannoys are around 95db, so don't know why you would need the extra power. Depending where in Berkshire you are, I'm about an hour away in London N3.
Originally Posted by montesquieu
Aries - Devialet 250 Pro - Harbeth SHL5+
Aries Mini - Audiolab M-One - Harbeth P3ESR