07-Nov-2015, 08:32
(07-Nov-2015, 00:32)sleach Wrote:(06-Nov-2015, 21:32)alandbush Wrote: The current update as per previous updates has often elicited various comments about the change to sound quality and to the behaviour of the Spark volume control.
The latest update has found me with the time and inclination to perform some simple measurements.
I hope they prove useful and provoke discussion but, hopefully, not argument. They are, after all, based on my devices, positioned in my environment were they are located for normal listening.
Thank you for taking the time, this is great!
Do you have any thoughts about what is going on in the 100-200hz area? Is that where the crossover to the side woofers is?
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The dip in the 100 to 200Hz region looks absolutely typical of the kind of bass null that you get due to room interaction. You could try a whole range of different speakers in the same room and the effect would remain to a large degree. This might be hard to believe with the microphone only 30cm away from the Phantom, but even here, a supprisingly large percentage of what the microphone will pick up is sound that has reflected off the walls, cieling etc. If you were keen enough, you could get a very long mains extension cable and try the test again in the garden and I'm sure this dip will vanish. (do not try if it is raining) They are great fun these graphs, and can be useful in setting up a room, speaker placement, trying room treatments etc. Also, they can lead to obsession, paranoia, insanity. (I thought my system sounded great, but I now find I have a bass null, I must fix this! I MUST! etc.)
