Cbm-170se
Since the Soundstage NRC measurements are for the original CBM-170, and not the revised SE that uses new drivers(which are claimed to be improved), I will provide the measurements here for the new SE version:
Frequency Response, On-Axis and Waterfall(CSD) (Waterfall graph is adjusted to the same average floor to average signal range and identical time window as used in Stereophile magazine, so that useful comparisons can be made).
Off Axis Response Sets, 0-30 Degrees and 45-90 Degrees:
Total Harmonic Distortion(THD) measured at 85dB, 90dB, 95dB, 100dB and 105dB at 1 Meter. (
Note: Soundstage does this at 2 meters. This means that the Soundstage 90dB is closest to my 95dB 1 M measurement, and the 95dB Soundstage measurement is closest to my 100dB 1 M measurement). According to these measurements, the CBM-170SE does use an improved mid-bass motor as claimed by Ascend Acoustics:
Channel Matching and Overall FR(Note: the slight treble rise around 10kHz is because the program used for this single measurement only - has no mic compensation ability to accept the calibration file for my measurement mic - and the mic has a slight lift around 10kHz). Otherwise, the response here is accurate. The slight ripples in the 70-100Hz respnose end are the result of slight room interaction(
though this measurement was made with the measurement sete up surrounded by many large absorbers, some minor interference still persists). This is 4 different CBM-170 SE speakers measured to check for QC/consistency:
Note: Though have analyzed cabinet vibrational behavior as measured at various points with an accelerometer and have found the cabinet to be highly resonant(as are most speakers), I have not provided these measurements here because I do not not have a fair way to display them for your relative comparison. The best method would be for me to get a speaker measured in Stereophile, and use it for the reference adjustment of the graph(to match their panel measurement) so that I can provide a graph that you can compare to their database usefully. Until I decide to buy a speaker measured in that magazine for this sole purpose, I will not include such a graph. I may, in special context, in the future, provide graphs with a comparison to other cabinets, made side by side under identical conditions/SPL.
-Chris