How does high-pass filter requirement affect system decisions?

I think it gives you a lot more flexibility for experimentation. 

I'm very happy with my AX-7e. Of course, I'm interested what an Ayre upgrade would do, but I think $12k of new music would bring more satisfaction than $12k of new hardware. 

I do feel like my break-in process took much longer than expected (assuming predominantly the components downstream of the high-pass filter). When I bought the Quatros, I also bought Pangea 9-gauge power cables for each speaker, 2 pair of Audioquest CV-8 speaker cables, Audioquest Colorado XLR cables for all my sources (along with Pangea power cables) and an Ayre L-5xe power conditioner. Oh, and the new crossover capacitors dropped into the AX-7e. These probably all play a factor. 

It's interesting how loudly you can play the system without any sense of strain. 

@nrenter You mention getting Pangea 9-gauge AC cables for your Vandersteen speakers.  Did these fit the low profile IEC plugs on the Vandy's?  A lot of AC cords don't . . .

thanks!

You now have a world of amazing amplifiers open to you !
i ran my 5A with SS Ayre, a 1961MAC 240 and REF 75 tube amp.
and I use an Ayre VX-R Twenty with my 7 mk2.

There are a fair number of Vandersteen dealers who are also Audio Research dealers, the pairing of Richard's speakers and ARC tube amps being a long-time favorite. I've heard that coupling at many shows, and at length at Brooks Berdan Ltd. and Optimal Enchantment in S. California.

Agreeing with bdp24 above.  ARC, Ayre and McCormack are three brands that have often been associated with Vandersteens over time.  And yes, many Vandy dealers carry one of those brands.  I'm still struck by my interaction with Vandersteen 1ci and Quicksilver tube amps.  There was so much there there!