davewantsmoore Posted November 23, 2017 Share Posted November 23, 2017 On 11/22/2017 at 9:29 AM, hochopeper said: Since the wavelengths are long is there still an issue with output summing differently when you move the second sub to its preferred location? Yes, and no. If you EQ, each subwoofer so the responses at the listening postion are identical .... then they will sum perfectly. To the degree tha this is not the case, things get complex. 1 Link to comment Share on other sites More sharing options...
STAIN0 Posted December 19, 2017 Author Share Posted December 19, 2017 Finally think I made some progress getting these beasts somewhat under control. now I am a complete newb to diy and to pretty much everything else haha. so please offer any advice/comments you can. Firstly took some REW measurements of each possible sub location. From those I decided on LWM+RWB, here is how they summed together with no delay applied. Then applied some eq'ing in the Inuke Then got some measurements in the other two listening positions. (not ideal, but okay for now) not sure how to fix the dips at 45hz and 68hz. applying delay might improve one but at the expense of the other. Then some Centre channel integration (still need to tweak the distance a smidge I think, maybe 2.4m. ok for now) My mains need sorting out somehow, have not done anything with them except audyssey so far. But here is how they integrated at 2.5m distance. For now, it looks ok to me, except the mains below their crossover point (80hz). Not too sure whats going on or what to do about it, like i said, complete newb Link to comment Share on other sites More sharing options...
davewantsmoore Posted December 20, 2017 Share Posted December 20, 2017 "Then applied some eq'ing in the Inuke" The EQ you have applied here is quite sharp. Best thing to do, is measure the combined response with no EQ at multiple locations, and then apply EQ that is appropriate for all locations. You'll likely find that the peaks and dips you're trying to correct are different when you measure from different locations. Then once you have your EQed result.... remeasure it from multiple locations, to ensure it's faitly flat from all positions. Otherwise you end up with a result which looks great on paper, but only applied to one position ..... and could be "bad" at other positions. 1 Link to comment Share on other sites More sharing options...
davewantsmoore Posted December 20, 2017 Share Posted December 20, 2017 Re: the dips you want to fix. You should emasure the phase to apply to correct delay.... ie. don't tinker with the delay just based on peaks and dips in frequency. Then fix the peaks and dips with EQ.... IF these peaks a dips exisst in all listening positions.... If they don't then just leave them The dips you are seeing are quire narrow - ie. don't cover very much of an octave .... so they might be better left alone. It looks bad on a chart, but they're not necessarily very audible (where as EQ to fix the dip, which is wrong for another listening position, might create a big sharp peak - which can be very audible) 1 Link to comment Share on other sites More sharing options...
jtalden Posted December 22, 2017 Share Posted December 22, 2017 Hi STAIN0, An impressive build. Are you all set integrating them into you system yet? John 1 Link to comment Share on other sites More sharing options...
STAIN0 Posted January 1, 2018 Author Share Posted January 1, 2018 Hi John, welcome to stereo.net.au I actually have not touched it since I last spoke to you. your help in pm's has been invaluable thus far, when I do get back into tweak mode I'll no doubt start bothering you again Link to comment Share on other sites More sharing options...
jtalden Posted January 2, 2018 Share Posted January 2, 2018 That's good. I am in the process of packing up for a cross country move. The next couple of months will be spotty for forum activity. I will probably have time to monitor this thread and support as needed, but I may be unavailable for a 2-3 days occasionally. I doesn't look like you will need much help based on your charts so far, but I can review/confirm your XO timing as needed. 1 Link to comment Share on other sites More sharing options...
STAIN0 Posted January 2, 2018 Author Share Posted January 2, 2018 appreciated mate. Goodluck with the move will definitely have you eyeball my XO timing. Link to comment Share on other sites More sharing options...
STAIN0 Posted January 2, 2018 Author Share Posted January 2, 2018 On 21/12/2017 at 10:07 AM, davewantsmoore said: "Then applied some eq'ing in the Inuke" The EQ you have applied here is quite sharp. Best thing to do, is measure the combined response with no EQ at multiple locations, and then apply EQ that is appropriate for all locations. You'll likely find that the peaks and dips you're trying to correct are different when you measure from different locations. Then once you have your EQed result.... remeasure it from multiple locations, to ensure it's faitly flat from all positions. Otherwise you end up with a result which looks great on paper, but only applied to one position ..... and could be "bad" at other positions. On 21/12/2017 at 10:10 AM, davewantsmoore said: Re: the dips you want to fix. You should emasure the phase to apply to correct delay.... ie. don't tinker with the delay just based on peaks and dips in frequency. Then fix the peaks and dips with EQ.... IF these peaks a dips exisst in all listening positions.... If they don't then just leave them The dips you are seeing are quire narrow - ie. don't cover very much of an octave .... so they might be better left alone. It looks bad on a chart, but they're not necessarily very audible (where as EQ to fix the dip, which is wrong for another listening position, might create a big sharp peak - which can be very audible) That all makes sense Thanks... Link to comment Share on other sites More sharing options...
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