I'll see what I can do.

"Honey, the guys on the speaker forum say I should get a new receiver so I can hook up all the equipment and not have to swap cables any more. I think it's a good idea. What? You don't think it's fair that I get to spend money on myself? Well, you've had a complete monopoly on our son for the past 6 months with three more to go! You call that fair?"

You think that argument would work?