Hi guys, I'm not sure if this is the place for this question or if it would be best placed in the Speakers/Sub forum? (Mods feel free to move it as you see fit.) Firstly, my apologies, this is going to be a long rambly post, if you need the loo or yearn for a coffee, go do it now. I'll be here when you come back. You came back, cool! Comfy? Ok here we go. I've never been very sure on how best to approach setting up Subs. Consequently, my Sub is probably not very well integrated with the rest of my speakers. I have RTFM but it's not much help, the amp manual says refer to your speaker manual and guess what the speaker ones say. There seem to be so many settings on the amp which effect this, its a job to know where to start...... Subwoofer Channel Level? Crossover Frequency (in hz)? Subwoofer Mode? Main Speaker Size? LFE Level? Bass Level? Subwoofer Peak Limit Level? ....and that's ignoring the settings on the sub. Ok, so the kit.... Denon A11SR Amp (Recently aqcuired) Kef - RDM One - Monitor Series (Fronts - These are small monitors with a quoted frequency response of 100Hz - 18 kHz and a crossover of 2.1kHz) Kef 100c (Centre - With a quoted frequency response of 70Hz - 20 kHz and a crossover of 3kHz) Kef 34DS (Surrounds - With a quoted frequency response of 80Hz - 20kHz) Mirage PS-8 Sub (Left over from my long gone AVS-500 package. With a quoted frequency response of 29Hz - 100 Hz and a Low Pass Filter of 50-100Hz) I'm sure a lot of that isn't relevant but there we are. Ok now the questions... a) Firstly, I can plug the sub line-out from the amp into one of two ports on the Sub. One marked "Crossover Input" and one marked "Sub Input". The "Crossover Input" one bypasses the Low Pass Filter and Bass Volume dials on the Sub, presumably leaving management to the amp. Which one should I use? b) If I use the "Sub Input" one how do I get the Low Pass Filter and Bass Volume dials right? c) Would I be right in assuming the Crossover Frequency setting on the amp should be set to 100hz as this is where the main speakers end and the sub begins? d) Which speakers should be set to small? All of them? e) How does one set the channel level on the amp for the sub. I'm used to using an SPL for the other speakers but when I tried to use that method on the sub the needle moves erratically. I'm presuming the SPL can't accurately measure such low frequencies? f) When the settings are right will the sub be unobtrusive when listening to music? g) Anything else I should be aware of? Order I should do things or whatever? Thanks in advance for any pointers!