Tube amp forethought


Hello, im researching my retirement two ch audio system and tube amps are in the forefront of my “wants” my plan will be a pair of QUAD ESL’s not sure which just yet

What do i need to know about maintaining a tube amp, like a AudioResearch 120 for starters or other tube amps. Biasing is totally new to me. Tube life and modes (triode, Pentode, UltraLinear) all foreign to me.

im a 40 year hobbiest so im pretty versed, this is just an unknown territory for me, thanx guys !

kgveteran
I have long assumed that when anyone used the term the QUAD ESL they were of course referring to the original electrostatic model Peter Walker introduced in 1957. All other QUAD modes are referred to by their model designation---63, 989, etc., even the reissue of the original (a while after that model had been discontinued), named the QUAD 57.
If you are considering Atma Sphere, I would also ask that you consider Sound Lab speakers.
Ralph holds them in high regard-which is saying something. At least, to me.
Bob
You don’t say if you have a ssd system now. I got into tubes via an Audible Illusions pre-amp. There are used ones available at modest cost. Tube pre-amps make a huge difference in sound.
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