Tubes are a consumable, and how you manage them changes how long they last and how they sound.
The question of whether to leave a tube preamplifier on, switch it to standby, or power it completely down comes up constantly in our community. The ideal answer is standby — which works if your preamp is a hybrid like our BHK preamp. Standby keeps all the solid-state circuitry active and ready while the tubes go completely off — no heat, no stress, no accumulated hours. When you come out of standby, the solid state is already there and the tubes wake up fresh.
But, most vacuum tube preamps aren't hybrids, so it's best to shut them off completely.
One more thing worth knowing. When you power a tube preamp up from fully off, give it at least fifteen to twenty minutes before listening critically.
Sound during warm-up is not representative of what the equipment can do.
Tubes need time to reach thermal equilibrium, and the character during that window can seem noticeably leaner or brighter than what settles in once everything is up to temperature.
A lot of us in the HiFi Family have been too quick to judge a piece of gear before it was even ready to perform.
Patience is part of the ritual with tubes.
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