Tube amp phase explanation

Mpffffff.... Hmmmmm.... speakers....

This household keeps Magnepan, AR & Dynaco speakers.
Daughter & Son-in-Law keep Revox & AR.
Brother keeps Accustat (electrostatics).
Son & Daughter-in-law keep no speakers other than in the television - young kids.

At present, I have the only tube driven systems in the inventory - Dynaco ST70 - modified stock & Scott LK150 - also modified stock.

Neither tube amp will drive the maggies well in a 17 x 28 x 10 (all feet) room. I use a brute-force Citation 16 solid-state amp for that purpose.

My interest would be in the amp/speaker/room size dynamic and how that is worked out. And whether a listening area is designed around a 'sweet spot' or not. NO (audio) sweet spots permitted in this house... that is what headphones are for.

VTA's M-125s will drive Maggies, at least my old MGIIs. Still need a sub-woof, though, but that's a speaker weakness. Vandersteen makes a nice subwoofer x-over that takes the heavy lifting off the tubes and passes the low end to a powered sub-woofer.
As to "sweet spot," that's for the birds -- unless you're single, never entertain company, and have your listening chair and speaks bolted to the floor. More raptor oil.

I've always set up my gear for the proverbial sweet spot.  Might as well just settle for bose if you like that diffuse sound.  
Or don't worry about phase, just plug in the speaker connectors randomly.

I think it is worth noting that our psychology plays I big part in what we hear. My more so than many of us realize if that were not the case then company's like audioquest would be out of business

deepee99 wrote:VTA's M-125s will drive Maggies, at least my old MGIIs. Still need a sub-woof, though, but that's a speaker weakness. Vandersteen makes a nice subwoofer x-over that takes the heavy lifting off the tubes and passes the low end to a powered sub-woofer.
As to "sweet spot," that's for the birds -- unless you're single, never entertain company, and have your listening chair and speaks bolted to the floor. More raptor oil.

How big was your listening room?

The MGIIIa speaker extends quite far down. I have not felt the need for a SW, but for when I listen to the 3as.

It is not uncommon for the individual drivers within a single multi-driver speaker to be wired out of phase with respect to one another. This is often done in an attempt to compensate for phase distortion introduced by high order crossover networks.