Hi changing my 804s speakers and I have a pair of Midrange Phase plugs in satin finish now surplus to requirements. These make no improvement at all to sound quality and are just a bit of a change cosmetically, simply unscrew the original black ones and replace with these. Selling for £45-£50 elsewhere yours for £35 inc recorded postage to mainland UK or collect in person for £30 from Rossendale in Lancashire, payment by paypal friends and family please.
Regards
Roy.