vandersteen quattro versus gallo 3.5

The Vandersteen Quatro is phase and time aligned and features
a neat Battery Bias high passed which is in my opinion
the best way to let a tube amp excel and recover.
It not only lowers distortion improving dynamics clarity transparency but also increases tube life. The feed forward design is an innovative idea that allows the Main amps personalty into the bass amp for a seamless transition.
Add to that the In room bass compensation and the electronics you currently own being voiced with Vandersteens.
Best Johnnyr

The Vandy has the powered woofer and its "room adjustment" feature. It's capable of deep, powerful, tight (highly damped) bass response, coupled to Vandy's basically neutral, if (in the case of the powered speakers, very) slightly soft presentation thru the rest of the range. Overall, I like it a lot.

The Gallo is a different kind of animal as it's tweeter is virtually omindirectional. If you "co-drive" it's woofer with a dedicated amp, the bass character of these 2 speakers might converge a bit (haven't heard a direct A-B, so I'm speculating), but that near-omni tweeter will still set the Gallo apart.

IMHO, this one is more apples and oranges - a case can be made for either. Even more than usual, personal taste will dictate your choice.

Good Luck

Marty