Magnepan 20.7's & Tube Amp

which one has more amps into 4 ohms?

This is a bit of a trick question.

The amount of current will depend entirely on how much power the amp makes into 4 ohms. If 200 watts, the current will be 7.07 amps regardless of the amplifier involved, tube or solid state.

Wendell Diller always made a point of telling me that the best he every heard that speaker was at Johnathan Valin's house using a set of our MA-2s. What we found with Maggies in general is that if you want to play the speaker with tubes, keep the speaker cables between the amp and speaker really short- over a foot is too long! Place the amp with the speaker terminals facing the speaker's terminals and install the really short speaker cables.

This is a really good place to have monoblocks :)

Anyway, this gets you the best bass. Don't worry about vibration from the speaker; the amp will see very little. Maggie owners know what I'm talking about.

Ralph, wouldn't a set of Zero Autoformers be of help?
Bob

Ralph, wouldn't a set of Zero Autoformers be of help?

The MA-2s don't care, but on a lot of amps, yes. We are in Magnaplanar's back yard up here in the frozen wasteland, so we have a good number of local customers running M-60s on some of the smaller Maggies, and the ZEROs are how they do it.

Paul Speltz has a letter from Steve McCormick in which Steve states that although his amps have no problem doubling power into lower impedances, that they actually sound better if they are driving 4 ohms through Paul's autoformers (the ZERO). So the ZERO's help with a lot more than just our amps.

A Big high current  solid state amplifier would have much better grip ,control 
On the Panels.  I have used big Bat amplifiers  and the Pass labs 250.8 would be a 
A match as close to Ideal as you can get.  With s good tube preamp.
Even if not was not mentioned it should have been if you want to heard the truth. 

Im using 2x Parasound A21 for my Maggies but still have to run two little mj acoustics subs to give it that extra ooph