best subwoofer for stirling LS3/5A

I like S series RELs. I use them with Spendors; just use them to augment the bass as the 3/5s sound better played full range. When I sold 3/5s I used the Swedish made Audio Pro; I think they are still around but haven't seen any for a while.

The LS3/5a is a tough match for a sub because there's a broad mid-bass hump. My general observation is:

If you cross to get a seamless hand-off, you'll likely have too much bass, octave to octave. If you reduce the subwoofer's output to preserve a good octave to octave balance, you'll have a level mismatch at the x-over point and a "raggedy" hand-off.

Maybe someone else has had success and can offer a solution, but the LS3/5a just doesn't -IME- lend itself to mating with a sub. I do seem to recall however, that one of the brands licenced to produce the design (maybe Chapman?) made a less expensive variation and a matching subwoofer/stand. Don't know if/how it worked, but might be worth researching.

Good Luck,

Marty

You would be best with a pair of pre owned Vandersteen 2WQs
The adjustable High pass allows for a more precise transition, will also clean up the bass in the LS35A.
The pair of 2WQs in the room can be adjusted to preference level, downward firing sealed design is more agile and faster
than anything we have ever heard.
Yes I am Vandersteen dealer
Johnnyr