Posted by Wayne Parham [ 188.8.131.52 ] on October 15, 2005 at 14:36:25:
In Reply to: Re: Hornsub shootout RESULTS - Tuba 24 posted by Wayne Parham on October 15, 2005 at 14:20:16:
Leland Crooks brought a pair of DR250 speakers that he hoped to test. So we had a little time at the end of the day and we ran a couple sweeps.
Weight: 40 lbs
Dimensions: 22" x 22" x 22"
Power handling: 150wrms
Frequency range: 100Hz - 16kHz
Max Output: 125dB/M
Distortion at 100 watts: 5%
Impedance is 8Ω, so 28.28v input is 100 watts. Since we measured 10 meters away, the values correspond to both 2.83v/1M and 1W/1M.
The blue line is SPL, and the violet line shows distortion. Average distortion is 25dB under the fundamental, which is about 5%. Since measurement was taken at 10 meters, add 20dB to find SPL at 1 meter. With 100 watts input, the 10 meter measurement works out the same as 1 watt input measured at a distance of 1 meter.
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