Jeff Permanian wrote on Thu, 20 January 2011 17:09 
Orbit Shifter:
2 watt so minus 3db for a 1 watt

Jeff,
“2 watt so minus 3db for a 1 watt “ so 3 dB from the 98.3 Hz 110 dB peak, we get 107 dB.
At 36.6 Hz the graph shows 103.6 dB, keeping in whole numbers 104 dB 3 dB is 101 dB.
Halfway between the two is 104 dB, yet you rate the Orbit shifter sensitivity at 106 dB at 8 ohms in your web site specifications.
2 dB is not a big deal, but a discrepancy.
If the test used a 4 volt signal, that would be 2 watts at 8 ohm.
However, 4 volts is 8 watts at 2 ohm, if the Orbit Shifter speaker was wired at 2 ohms and driven with four volts, the adjusted one watt sensitivity would be 98 dB, which would be a large discrepancy.
Would you please explain the 2 dB (or possibly 8 dB) discrepancy, and tell us some measurement details, such as the voltage used, the impedance (2 or 8 ohm), distance from microphone to speaker, microphone calibration, and distance to any walls ?
Art Welter