Buyer Dispute

This is exactly what PayPal is for. Get your refund and move on.

What LloydC said above is 100% accurate. This is entirely on the seller to fix with a full refund or partial refund depending on the wishes of the buyer. Lloyd I think we come from the same training which normally takes one 3 years to accomplish. You laid it out perfectly there is no other way to even look at this.

@kirbymydog. You are right to keep pressure on the manufacturer. Given the big marketing push by B&W for the D4s, perhaps existing customers are being overlooked in favour of building new stock. The same is happening in the bike industry where spares are in very short supply as most manufacturing is being dedicated to supplying OEM bike brands. But in the context of high end hi-fi which, by comparison, is a very niche market, it is a very short sighted strategy. Would you buy another Bowers and Wilkins speaker if you thought it would not be supported by the manufacturer for any length of time? That's a rhetorical question of course.

The OP gave the seller positive feedback. A PayPal dispute is only good for 45 days. The speakers were purchased 6 months ago. I doubt very much that the OP will get any kind of a refund. This is the PayPal  rules!

PayPal requires you to file all claims within 45 days of the transaction. If you wait longer, PayPal will deny the claim automatically. You must also make sure you used PayPal, and not a credit or debit card, to pay for the items in question.

Yes, the positive feedback was my bad. I did not wait to critically check them out. All of my correspondence with the seller was cordial and phone calls were cooperative. That was back around the time of the purchase. I’ve obviously learned something.