Which amp for B&W?

[Al ears]

I would agree!

In which case no amount of amp swapping is ever going to get the best out of them.

 

[Stuart.W.D]

I’m confident these amplifiers will pair beautifully with these specific speakers, and I suggested alternative speakers that could align better with the OP personal taste. As I also, believe the speakers might not be suitable. However, the real test is hearing it in person, nothing beats a proper listening session to make the right choice. I hope the OP lands on a setup that brings many years of joy. I understand how frustrating it can be to struggle with hi‑fi gear after investing in it, and I want the OP to feel supported on this forum. Hence, my recommendations!

 

[MUSICRAFT]

I'm looking for smooth and warm sound with big soundstage, depth and well defined punchy bass

in the first instance look at alternative amplification. The discontinued and still excellent NAD C370 on the used market for not much money will give the 603 S2 AE's the appropriate tonal qualities and has the power to keep the 603 S2 AE's firmly in check.

 

[Deliriumbassist]

Try angling the speakers away from the listening position more, and experiment with moving them either further into the room, or close to the wall behind them.

Most of the time, people place their speakers between 6-24" into the room, which can be considered a 'dead zone' especially for upper bass and lower midrange, which may explain a lack of punch. Much cheaper to give placement a try when possible.