Oh Martyn, I didn't realise you use an 8000A still - I thought you were a Quad man... The 8000A MC input isn't as good as the 8000C offered and if you wish to stay with the brand, I'd look out for a late UK made (black cases) 8000C/8000PX or MX set, the later pre quite transparent (not as good as an AVI 2000 series or UK era 8000Q but better than the preamp in the 'A.' The X series power amps were DC coupled all through from memory and had a much leaner but ultimately clearer presentation, the 8000A sounding 'grey' and 'grainy' in comparison. I'd still say the later 8000A's were a cut above the sound we had from originals with the cables and speakers that were popular when the amp first appeared in the early 80's. And yes, I'm well aware of the pasting I had on the HUG because I feel and maintain that amps sound different using Harbeths as the speakers when using varied material and at various listening levels!!!!!
Above is my opinion based on personal experiences. It should be taken as read (but isn't always) that these 'personal' experiences/memories are subject to modification and may easily differ from other people's different experiences with various products. I hated the 8000A until the sources, cables and speakers we sold evolved to the point where the amp could work to advantage.
Tear down these walls; Cut the ties that held me
Crying out at the top of my voice; Tell me now if you can hear me