Thanks dcmfan and for the link. I've been experimenting quite a bit with placement and feel you are right. about 18" off the back wall sounds best to my ears. They aren't terribly picky it seems. It's kind of amazing how they disappear! I'm enjoying them very much and they are definitely long haul keepers!
Congrats! Those are keepers.
Blue Shadow, GD70, and dcmfan are three of the go-to AKers about TWs. To them, add -reverb- and gib48189. If this group doesn't know it, the knowledge is beyond obscure.
I know a bit, too, having
refurbed my 4-digit TWs I bought them in the late '70s. They have the octagonal woofers (Philips AD 7066 W/8) and glued-on end caps. The folks above offered encouragement and suggestions, making the outcome better than it would have been had I gone solo.
Glad to see that your experience with placement confirms dcmfan's suggestions. I have found that rule of thumb to work for me, too, since 1978. To that, I would add a couple of other things: Try placing them about 12" off the floor. I found elevating mine to be helpful for bass definition (something about standing waves, hard floors???). Next, experiment with distance between the speakers. Over the years, I find I prefer no more than 8' apart. YEAPDTM. (I made that up: "Your ears are probably different than mine.")
The attached TW 1A pics and schematics may be of help. I can't cite my sources ... probably one of the AKers mentioned above!
Cheers!