Reference strada one or two subs?

I've used my own Stradas with one Gallo TR-3 sub and with two of these subs. Two TR-3 subs are WAY superior to one. The Gallo subs use the same drivers as in the Reference 3.5s and I think would be a better match with the Stradas than the REL. Bear in mind that the Stradas don't go very deep and need woofer support (not just subwoofer), which the TR-3s provide.

The TR-3s are wired from line outputs on my Aesthetix Calypso linestage. Hard to tell what the crossover settings really are, since they are not marked as to frequency, but I have the crossover knobs' pointers set at approx. 12:30, and with the "level" controls usually set at 11:30 in my system. Both are subject to experimentation, but I think this is a good starting point. My main amps are SET monoblocks with 845-type output tubes.

You're welcome. I think you're right about the 110 Hz, or thereabouts. Be sure to check out that TR-3 before buying it. I had QC problems with a couple. Good luck.

I replaced the original spikes with "carpet penetrating CP1
Bearpaws" (their name) from a company called edenSound
(edensoundaudio.com). I had them drilled for 1/4" x 20 studs. Only
problems are (1) the studs go into the Gallo stands only about one-quarter
inch, (2) the studs are only 3/4" long, so shearing them is a potential
problem, and (3) they still rock a little because the footprint of the stands
isn't that large. But they do an excellent job of reducing resonances I used to
be able to feel by touching the stands. They couple better and they look cool
:-)

Total cost for 6 of these brass spikes incl. shipping was something like $240.