07-Nov-2015, 15:58
(07-Nov-2015, 08:28)streamy Wrote: Thanks for posting the curves and your interpretations. You show very nicely how the Phantom with Spark behaves in the normal listening SPLs. The volume control between 35 and 60 is linear (i.e. logarithmic), which is nice. Also there is no change in the frequency response. I see from your recordings in plot 2 that you went fom 50 up to 80 with a lower input signal. As I hear a steep volume progression for volumes between 60 and 75 (on silver phantoms) could you display these curves in a plot?
Also an eventually built-in loudness effect on lower volume (volumes 10-35) could be eventually measured. Did you do such measurements? Also at these lower volumes I hear a lower progression than between 35 and 60. Could your measurements confirm this?
Again, many thanks for sharing your plots!
The lower input signal measurements were an attempt to record volumes above 60 to determine if the volume behaviour changed as you suspect. However, the SPL responses were practically equal to the previous offsetting for the physical volume, I.e. SPL response for 60 @ -12dB was equal to 80 @ -32dB.
Nb - I could not advance beyond 60 without clipping and I thought the ambient noise floor may have interfered with lower volumes. However, I think I'll try lower volume measurements targeting below 200Hz.
