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.

Many thanks for your helpful comments and experience. How do you have the tr3s wired and what are your settings for the crossover?

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.

Really helpful. Thanks. Assuming its a linear scale and starting at 30 and ending at 180hz then a crossover around 12:30 should equate to something like 110hz or so it seems. My rel goes up to 120hz so I may try that first. Currently it's set around 80. Also see a tr3 locally that I may pickup and experiment with. Thanks again for the help.

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.