Thanks mate, I'm using an SPL meter (radio shack style) which had been calibrated through REW. Which smoothing should I choose?@shodan the mains only measurement is funky, you need some smoothing for starters but once you smooth then it will look something like
View attachment 1010211
what mic are you using and how are you using it?
Eh what? You mean all my scans over 500hz are worthless and completely inaccurate? Not that I care much about anything over 500hz..OK that explains it, the RS spl meter cannot be used above maybe 500Hz
that's correct, you need a proper mic for measuring full range. Stick to the sub + mains integration range when using the RS meter.You mean all my scans over 500hz are worthless and completely inaccurate?
And can you explain to me about measuring with one speaker at a time and one speaker and the sub? I take it I have to unplug one of the speakers? Can't see anywhere where to send the single to one speaker only...that's correct, you need a proper mic for measuring full range. Stick to the sub + mains integration range when using the RS meter.
Ok I'm going to re-read that a few times...You measure one speaker at a time because you are seeking to optimise the response of that one speaker at a time. Measuring sub and main together is to verify how crossover is behaving.
I have noticed that the crossover doesn't seem to work! i.e. it's set for 80hz and it's still outputting below that from the main speakers...Ok I'm going to re-read that a few times...
I have noticed that the crossover doesn't seem to work! i.e. it's set for 80hz and it's still outputting below that from the main speakers...
it really depends how you intend to configure them, you may need to measure them separately and together or just together only.
Mic is usually placed facing upwards and use a 90 degree calibration file however it makes no real difference for subs (orientation strongly affects high frequencies not low)
Hi topmetom are you replying to me? I am reading stuff all over the place, I’m finding it quite hard to make sense of it at the moment. Just looking at a single sub currently hoping to add another in a couple of weeks.
Hey Conrad, great thanks! Ringnut was kind enough to get me setup with some basics earlier and i think it is already a bit better. I will do these steps requested and post them up soonHey. If you want to post up your MDAT file (stick it in dropbox or google drive or something and share the link) I'll gladly take a look.
Ideal first measurements are (all with any EQ turned off):
- sub alone, measured on the R channel using L as a timing reference with the R speaker disconnected (this gives you sub alone, with the crossover engaged)
- Left alone, no sub but with the crossover engaged (so just turn the sub off) using L as a timing reference
- Right alone, no sub but with crossover engaged (so leave the sub off) using L as a timing reference
That'll give me a good place to see what delays you need to integrate the sub well.
Also, the camera icon at the top left of the main window in REW exports the chart as an image, much easier than taking photos.
Hey Conrad, thanks for the reply! Sorry it’s been sometime, i got a little burnt out. I have my second Dayton turning up tomorrow so by the end of the day i will have two subs up and running! Be interesting to see if the second one fills the 40hz dip. Interestingly enough the left speaker faces the door which is the entrance to the room, one of the only surfaces that is flat and without treatment...Thanks for the files, and sorry for the delay, I don't tend to spend much time in this forum (DIY's not a rabbit hole I want to fall in to!).
The measurements are good. The hole in the left speaker will be a reflection somewhere in the room, probably off the wall behind the seating position.
To be honest the Audysssey line looks great, is there anything that's not giving you that you feel you're missing?
The only thing I'm worried about is the big hole at 40Hz in your sub measurement that Audyssey is able to fill. Timing changes don't seem to have any impact on that, it's too far away from the crossover point. You can fill it in REW but it takes a 12dB boost, which is a lot, especially at 40Hz.
Are you able to see what Audyssey has done, does it show you its changes?