Showroom IV is our newly custom built in-wall home theater system.  Solus DR-ir8 speakers are used for the front three channels.  Solus GR-c8 ceiling speakers are used for the side surrounds and the DR-id8's are used for the rear surrounds.  Art of Sound's Maximus subwoofer completes the speaker package.  Arcam's latest, AVR350 and DV137 universal disc player, running into Shunyata Hydra 4 power conditioner drives the system.