I hav a tube pre I leave on all the time and the tube is over a year old as of now, many DACS and Phono Stage's have no on off switch. In my opinion that means it is intended to be left on.
Musical Fidelity X-Can v3 on/off
The Musical Fidelity X-Can v3 headphone amp has no on/off switch. Should it be unplugged when not in use, or does it, like my Velodyne subs, go into a standby mode when no signal is present? It does have a small tube. Any ideas?
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