dberning wrote:
Stuart's idea is good in principle, but caution is in order. It appears that there is a muting relay for the output with perhaps a timer that allows the voltages to stabilize in the preamp before allowing the output to be active. Without muting, there is a risk of destroying ss amps and speakers as the output voltage wanders around during warm up. If you do something like Stuart is suggesting, you probably would need a second relay for the additional outputs.
David
Thanks, David. You're right! I assumed tube rectification and long TC filtering! Forgot to look. Muting outputs during turn on/off is always a good idea!
On the subject of output coupling cap size, and for what it's worth, I prefer output cap sizing to keep F3 below 3Hz, even below 1Hz if practical. In my system, I can hear the difference.
Trouble is, those caps are big, expensive and not as good sounding in the upper registers. So the dual output approach allows smaller caps in both locations as well as optimizing the HF cap for best performance.
Stuart