Did you actually use the coupon code on Bose products? It shows expired now. Any coupon or offer I have ever seen for electronics stores will specifically exclude Bose. Apple is the same as mentioned. Most golf equipment manufacturers (Titleist, Ping, etc.) will be the same.

Somewhere I researched how they are able to do this without violating price fixing or collusion laws. Forget where I found it, but apparently they just refuse to sell to stores in the future if they discount their products.