First you have to tell us what we're looking at?I would be grateful for some feedback on my results thus far.
Apologies. This was the "subwoofer" setting. I did 2 512k sweeps from 0-200KHz. The different graphs relate to various gain levels and crossovers.First you have to tell us what we're looking at?
So, this is the subwoofer without the mains, or the mains without the subwoofer, or subwoofer + mains?This was the "subwoofer" setting
Yeah, certainly 80Hz would be your upper limit for the crossover. A lower crossover does help with that, but unfortunately precludes modal resonances being eq'd that may be caused by the lower crossed mains.My main concerns were not wanting to be able to localize the bass as the sub is right next to the seating position.
REW takes care of all that. Generally it helps to run your receiver test tones to set up the speaker levels first.Where would setting individual sound levels i.e. with test patterns on something like the Avia disc fit in with this whole process?
It was sub + mains.So, this is the subwoofer without the mains, or the mains without the subwoofer, or subwoofer + mains?
The different graphs relate to various gain levels and crossovers.
Huh. Since the extension of the sub is changing quite a bit with a change in crossover (normally wouldn't occur), it can only mean that your mains are quite capable and the sub is quite challenged. Tell us what type of mains and sub.It was sub + mains.
Be sure to include what we're looking.I've just been running some more sweeps so will post
Strange, it looks like just the opposite, i.e. the mains though a high pass. Note how the bass below 100 Hz rolls out more severely with each graph...Apologies. This was the "subwoofer" setting. I did 2 512k sweeps from 0-200KHz. The different graphs relate to various gain levels and crossovers.
Exactly, and that's the reason behing my comment above of : Since the extension of the sub is changing quite a bit with a change in crossover (normally wouldn't occur), it can only mean that your mains are quite capable and the sub is quite challenged.Note how the bass below 100 Hz rolls out more severely with each graph...
Perhaps not, but in your situation it isn't doing its job, and maybe a result of having the volume to low. The spec on the BK XLS300/PR is 20Hz -3dB. You aren't getting that. Your best extension is about 25Hz. It should be better. Locate the sub in a corner and see if you can't excite your room a bit more. And turn it up.....sub in question is a BK XLS300/PR (I can't post a url yet). It is well regarded this side of the atlantic and certainly not something that lacks ooph
It kind of is in a corner: well, by a recess but turn it up I will!Perhaps not, but in your situation it isn't doing its job, and maybe a result of having the volume to low. The spec on the BK XLS300/PR is 20Hz -3dB. You aren't getting that. Your best extension is about 25Hz. It should be better. Locate the sub in a corner and see if you can't excite your room a bit more. And turn it up.....
Well that will be goodAs long as your crossover is 80Hz or less, you won't localize the sub.
I couldn't find the embarrassed smilie but thanks for that I will bear that in mind!BTW, the Measured tab in REW is for overlaying and comparing graphs - rather than posting multiple plots, one plot would make it easier on you.....
Yes, 1/3 octave smoothing.These graphs all look like they have smoothing applied. Have they?
Thanks for your feedback.Well, your room is certainly cooperating, as you have no real problem modal peaks with a smooth response and crossover region, but your low end extension isn't what I would expect from that sub. It's stopping quite consistently at 25Hz rather than 20Hz ........ other than that the response is quite good.
Yes, that's the desired result.Even at the lower gain level I could feel a serious "thud" everytime the creature's feet hit the floor!
Yes, that's normal. Before you removed the loopback cable used in the soundcard calibration, you were advised to take a measure of the loopback cable with the newly created soundcard cal file in place. The result, of course, if the soundcard cal file was valid, would be a perfectly flat line. If you did this and got the desired result, then that channel is calibrated and should be trusted as flat.As for the low-end thing I wonder whether it's a room thing? I must say I did notice when calibrating the soundcard that the curve tailed off considerably at the low end
Yeah, when a sub is super close, its proximity can make you sensitive to the soundwave. It would be nice if you could get it nearer the source.conscious of the location of the sub i.e. right next to me
We typically suggest no soothing for subwoofer graphs. Just prepare you, that'll make it look worse than it does now.Yes, 1/3 octave smoothing.
At least make sure you have delayed appropriately.I feel very conscious of the location of the sub i.e. right next to me: something I thought I could calibrate out. A bit disappointing really given that it really can't go anywhere else.