Paraflex 2x12 CRAM Measurements

Measurement Conditions

• Ambient Temperature - 22° C

• Barometric Pressure - 1024mb

• Humidity - 74%

• Background Noise - 56dBA averaged over 1 minute

Location

Measurements were taken in a flat, empty parking lot with the nearest obstruction being a grove of trees approximately 55 meters from the microphone. The microphone was placed on the ground at 10 meters distance from the center of the subwoofer.

Hardware

• Paraflex Type O 2x12 version 2 loaded with B&C 12NBX100-8 drivers wired in parallel

• Dayton Audio EMM-6 Calibrated with factory file

• Focusrite Scarlett 2i2 Interface calibrated using REW loopback

• Admark ADP1500 Class D Plate Amplifier

• REW v5.31.2

Measurements - .mdat file download here

• A 1w/1m calculation is not provided, so the purpose of the below measurements is more to examine the overall curves of the response, group delay, distortion, etc. rather than sensitivity.

• All graphs are shown with a 500ms left/right window applied and no smoothing

Note - 2dB of compression with a gradual softening of the low frequency knee was observed as the output level was increased in steps from 109dB > 129dB

Note: THD of 10% with a dominant H3 was reached at an output level of 129dB @46Hz in half space using a sine sweep stimulus, which would represent a maximum “safe” distortion limited SPL figure with the aforementioned driver loading.