| learn from my mistakes.
Playing around with REW over the weekend I noticed mistake I've made in the past that messed up all my results.
I have my USB soundcard constantly connected to the back of my AVR, when I use REW I just plug the USB plug into the laptop. The signal runs through the bass management of the receiver. To test the mains and sub integration I have both the mains and the subs on, to test the LFE channel I was switching off the power amp for the mains, instead of connecting the soundcard output directly to the BFD(can't get behind my rack).
The thing I realised after about 3 hours of tweaking my curve is, the 80hz crossover is still in the signal chain, but the LFE channel rolls off at 120hz. The crossover in the AVR needs to be reset to 120hz to measure the LFE channel. When I did this and re measured everything above 80hz was now way up on the previous measurements, 110hz was equal level to 20hz and I have a mean house curve in place.
I did my setup again from scratch and the result is a HUGE improvement over what I had previously.
Another change I made was to use a 100hz crossover instead of 80hz, it gave a lot smoother response than the 80hz, localisation won't be a problem as I have one sub behind each main speaker.
While I was on a roll I thought I'd play around with positioning of the mains, I ended up bringing them forward about 10 inches and the imaging and soundstage depth improved immensely. I've actually been sitting down listening to 2ch music for hours on end since I reposioned the speakers and made a music preset for the BFD, something I never did previously.
All in all a quite productive sunday arvo.
Hakka.
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