Read about the problem with the 500, so that's why I went with the 600. Can't get LFE to output using optimizer on Star Wars DVD or AVIA disk. Subwoofer works (pulls bass from other speakers) but not LFE. Maybe a setup problem, so let me explain and you guys let me know if I just have something hooked up wrong. Onkyo HT500, SR600 (back channel disabled on reciever since only 5.1 speaker set), Toshiba SD-3109 DVD. On the back of the DVD I have 3 options for audio out: 1) 6 analog connections for 5.1 system, 2) 2 channel analog out, 3) Bitstream/PCM optical or coax I'm connected to the reciever via the optical digital connection. I'm not doing component switching and strictly the audio is connected. The following is my input type configuration on my reciever right now (though I've tried just about every conceivable alternatives) a) Input type on the reciever is Optical b) D. Format is :All (choices of DTS, PCM, All) c) Multichannel: No (choices of yes,no) d) A/PCM: Surround (choices of Surround, unplugged, studio mix, tv logic, all channel st., direct, stereo) e) PCM 96khz: Direct (choices of direct, stereo) f) Digital formats: Surround (choices of surround, stereo) Listening Modes -- Surround --Neo:Cinema (choices of Neo:Cinema, Neo: Music, PLII Movie, PLII Music Display that shows when I'm running Star Wars Attack of the Clones: DVD, Neo:Cinema, DTS, Neo:6, PCM, PCM FS: 48khz Questions: 1) I'm right to connect through the optical digital PCM connection right (rather than the analog?) 2) Since it's PCM, the reciever never shows anything like Dolby Digital 5.1 on display, always shows PCM...is that correct? 3) What the heck listening mode should I have it on when my Star Wars DVD is on? 4) The instruction manual has the DVD as being hooked up using the COAX digital cable rather than the optical. Should I try that or will it make a difference?