Power amp for modelers. Alternatives. Class D vs Class AB?

[laxu]

I never found: what if the microtube in the Bluguitar fails? It's not easy to swap it, and they don't sell it as far as I know.

I'm sure BluGuitar will help you with that. They are so confident in the tube's durability that it's soldered straight on the board. It's not meant to be replaced.

 

[Chocol8]

My more cynical fix to the post above:

They are so confident in the tube's durability probability of lasting longer than the warranty period that it's soldered straight on the board. It's not meant to be replaced, but they may be happy to charge you to solder a new one in if it's profitable.

 

[gearJunkie]

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