Autobarn is having a sale with 30% off car care and selected sound products for this weekend only. I originally saw this on tv and I couldn't find it on the website but a Autobarn store in Victoria has a facebook page about it so I assume it is national too. Confirmed - went today, it is advertised in NSW, QLD and VIC.
Cut and paste from the facebook wall.
"30% Off car audio including Clarion, Kenwood, Sony, Pioneer, Philips, Kicker and US Audio. Great savings on head units, subs, amps and speakers. Excludes audio accessories
Also 30% Off car care including Autoglym, Meguiars, Mothers, Bowden's own, Armorall and more. Car wash, polishes, wax, upholstery cleaners, wheel cleaners, tyre shines, air fresheners, chamois and sponges."
Small print reads;
Off regular ticketed price. Not to be used in conjunction with any other offer. No rainchecks. Store stock only. Excludes audio accessories.
My local store in Qld has the same ad on their Facebook page, so I think you're right right about it being national. Thanks master phi