Old amps like Futtermsn judt asking for trouble their problems were many
yes they sounded good but tons of unit failures. Look for a modern amp like Ayon for example transformers are the heart of the unit , Ayon use world class Lundahl for transformers and chokes,
And micro processor controlled to monitor each tube for optimum operating range ,then auto bias just adds more resistors in the circuit and averages all tubes in sum too much wasted energy , and no cheap sheep metal that vibrates
thick aluminum chassis even the tube sockets are gold over solid copper ,most are cheap brass.
the spirit3 highly recommended.
yes they sounded good but tons of unit failures. Look for a modern amp like Ayon for example transformers are the heart of the unit , Ayon use world class Lundahl for transformers and chokes,
And micro processor controlled to monitor each tube for optimum operating range ,then auto bias just adds more resistors in the circuit and averages all tubes in sum too much wasted energy , and no cheap sheep metal that vibrates
thick aluminum chassis even the tube sockets are gold over solid copper ,most are cheap brass.
the spirit3 highly recommended.