We do offer a 60 days buy & try program so you can test the subwoofer where it matters most: your room.
Testing subwoofers in a store makes very little sense as the room will have a big impact on the sound.
The B&W DB1D is a great subwoofer soundwise, but for the price of one B&W, you could buy two 1723 Subwoofer 2S and still have some spare change.
You will also find that just one 1723 Subwoofer 2S will outperform the B&W in terms of dynamics, impulse response, and musicality.
So I would definitely recommend giving it a try, you won’t be disappointed.