Caleb -- Thanks for the interesting post. I put Floyd Toole's book on my amazon wish list.
>From a implementation standpoint, I took away two things: 1) At least two subs 2) That, at a minimum, the subs be equalized (< ~100Hz, though <500Hz would be better). Now, if I understand correctly, you are suggesting that IIR filters are better than FIR filters. I know of three options for doing the sub EQ, the built-in PEQ in a Velodyne DD-10, or a Behringer DEQ2496, or Inguz. I assume that the PEQ of the Velodyne EQ & the DEQ2496 are IIR-based? (I guess I plug the DEQ2496 into the 'digital loop' of my Transporter?) With Inguz, aren't there two ways of doing this? One is to build a filter from a sweep using DRC (wish I could figure out which DRC parameter would only apply this to <500Hz). But this would be a FIR filter. The other way is using the EQ function in Inguz. I'm not quite sure if this method is FIR or IIR. Inguz describes it as: "The InguzDSP EQ filters arent like that. Theyre semi-parametric linear-phase shelving filters. By semi-parametric I mean that you only have two adjustable parameters: frequency and amplitude. And shelving means that the frequency response in between two adjacent bands is a gentle (cosine-based) slope." (See: http://inguzaudio.com/blog/2007/09/27/eq-filters-shelving-and-parametric/) The other question I have is about the pros/cons of active vs passive crossovers for subs? Thanks, muski -- muski Transporter via XLR->Bryston BP26DA->Bryston 4B SST->Wilson Watt Puppy 7s Transporter via XLR->Headroom Max Balanced Headphone Amp->Balanced AKG701s ------------------------------------------------------------------------ muski's Profile: http://forums.slimdevices.com/member.php?userid=3670 View this thread: http://forums.slimdevices.com/showthread.php?t=67022
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