Hi, I'm using an Arcam AV8 with a Velodyne SPL800 subwoofer. I'm using the line-level sub output on the AV8 to connect to the line-level input on the sub. I'm experiencing two issues: 1. I never get anything sent to the sub when using the DACs in the AV8 in any kind of pro-logic mode (e.g. PL II Music, Movies etc). 2. Some DVDs produce no 5.1 output whatsoever (e.g. R1 Shrek, R2 School of Rock, Starsky and Hutch. Others do (e.g. R1 Blade 2). I've had the AV8 for around eighteen months and was previously using a Sonus Faber Gravis. This was connected using both low and high level inputs and seemed to work fine. This may have been becuase the AV8 was sending the .1 stuff to the front channels and hence it was being picked up by the sub's high-level input. The new sub has no high-level input so this is no longer an option. Does anyone have any ideas? Would a firmware update help? How do I know which is the current version and how can I find out which version I'm currently running? Any help greatly appreciated. Jules.