Hi Mc1sound,
As far as I can tell, the P-7 pre-amp generates no heat - it never even gets a little bit warm. I suspect the P-8 pre-amp would also run cool.
The W-8 amp is a different story, however. It runs quite hot and needs breathing room. It's got 2 1.3kVA transformers, has a power supply capacitance of 240,000uF and has a spec output power of 500 wpc at 4 ohms (1,000 wpc at 2 ohms). It's a pretty powerful amp.
As far as I can tell, the P-7 pre-amp generates no heat - it never even gets a little bit warm. I suspect the P-8 pre-amp would also run cool.
The W-8 amp is a different story, however. It runs quite hot and needs breathing room. It's got 2 1.3kVA transformers, has a power supply capacitance of 240,000uF and has a spec output power of 500 wpc at 4 ohms (1,000 wpc at 2 ohms). It's a pretty powerful amp.