|I have only one suggestion for Ed, and it's born of a somewhat lazy nature: could the frequency response graphs be made with a consistent y-axis scale? Ed, I've seen you use 5 dB, 10 dB, and 20 dB divisions for the major scale on the y-axis, and while it is of course absolutely your prerogative to use whatever presentation scheme you wish, it makes it easier for guys like me if the scale is uniform from review to review so I can just put up the graphs on the screen and get an immediate idea of the relative flatness of each sub's response curve.
Selecting a consistent scale is tough because of the vastly different FRs subs will exhibit in a ground plane test environment.
The MRS-10 rolls off pretty quickly quasi-anechoic, and in order to show 20 Hz and the also the peak frequency of the curve, I had to adjust the vertical scale.
For indoors, we all know how bad the FR can look (from room acoustics) if the vertical scale is sufficiently expanded. I show the indoor curve on a more compressed scale to give a "general" idea of the low frequency extension and overall curve shape in a typical living space because I think the human ear is more sensitive to broader changes in the FR curve than to narrow peak or valleys. Also, the indoor curve is an average of three test locations - again to provide a general idea of what most prospective buyers can expect in a mid-size room.
I have a Rane PE-17 which I disable for all indoor product testing, but suffice it to say I could make the indoor FR curves look substantially flatter/better if I wanted to. But the typical enthusiast lacks a PEQ and the capability to accurately measure its effect, so I try to keep things reasonable with the consumer in mind.
But thanks for the suggestion, and I will be as consistent as possible with respect to vertical axis while still satisfying these other goals.
|I wonder if there will be comparisions against the $400 SVS on the forum, would be interesting.
While comparisons to like-priced products are only natural, these two subs are really quite different in design (very small sealed vs. larger vented). If you want to see how the two drivers actually compare, you would need to install them in the same type/size of enclosure.
It is unlikely SVS will introduce a small sealed unit for its excellent 10" woofer, but Acoustic Visions may in the future offer a larger vented application for the 10" XBL^2 driver in the MRS-10. That would be a much better product to directly compare against the PB10-ISD from a pure performance standpoint.