Tube amplifiers are also often heavy. The transformer is generally the heaviest part of an amplifier (and probably the largest). Your typical solid-state amplifier has one of these. Your typical tube amplifier has three of them, and they are often larger. That means your tube amplifier is a lot heavier, and probably it is more expensive because these transformers are not cheap. Your tube amplifier is also going to be a lot larger. It will also probably not put out as much power for the same money, so you are left prowling online used market places for more efficient speakers.