All loudspeaker measurements are performed independently at the National Research Council of Canada. All measurement data and graphical information displayed below are the property of the SoundStage! Network and Schneider Publishing Inc. Reproduction in any format is not permitted.
Microphone measuring position: middle of tweeter
Grille: on
Sensitivity: 87.50dB (averaged 300Hz-3kHz, 2.83V/1m)
Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: on-axis response
Middle curve: 15 degrees off-axis response
Bottom curve: 30 degrees off-axis response
Chart B: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response
20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis
Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 90dB SPL
Bottom curve: THD+N @ 90dB (50Hz - 10kHz)
Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Vertical axis: impedance
Horizontal axis: frequency
Vertical axis: phase
Horizontal axis: frequency
All loudspeaker measurements are performed independently at the National Research Council of Canada. All measurement data and graphical information displayed below are the property of the SoundStage! Network and Schneider Publishing Inc. Reproduction in any format is not permitted.
Notes: The BP-8080ST loudspeaker shows a frequency-response anomaly between 200 and 500Hz when the measurement microphone is placed in front or to the rear of the cabinet. This is because of how the midrange drivers are configured -- the soundwaves they produce “wrap around” the cabinet, causing cancellations in front of and behind it. Because of this, we performed additional frequency-response measurements on a customized speaker supplied by Definitive Technology that allowed us to measure the combined output of the tweeter and midrange drivers on the front baffle, to get a better indication of the speaker’s true frequency response. We also supplied a measurement of this customized speaker’s bass output only. We published these additional graphs below in the “Frequency Response and Sensitivity” section (charts C and D).
Because the BP-8080ST also displayed quite-low distortion at levels of 90 and 95dB, we published additional graphs of “Total Harmonic Distortion + Noise” and “Deviation from Linearity” at levels of 100dB, which we don’t normally do.
Microphone measuring position: tweeter axis
Grille: on
Woofer control: "11 o'clock"
Sensitivity: 89.52dB (averaged 300Hz-3kHz, 2.83V/1m)
Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: on-axis response
Middle curve: 15 degrees off-axis response
Bottom curve: 30 degrees off-axis response
Chart B: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response
Chart C (customized speaker): 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Curve: on-axis response from tweeter and midrange drivers on front baffle only
Chart D (customized speaker): 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Curve: on-axis response from bass section only
20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis
Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 90dB SPL
Bottom curve: THD+N @ 90dB (50Hz - 10kHz)
Chart B: @ 95dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 95dB SPL
Bottom curve: THD+N @ 95dB (50Hz - 10kHz)
Chart C: @ 100dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 100dB SPL
Bottom curve: THD+N @ 100dB (50Hz - 10kHz)
Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Chart B: Difference @ 95dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Chart C: Difference @ 100dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Vertical axis: impedance
Horizontal axis: frequency
Vertical axis: phase
Horizontal axis: frequency
All loudspeaker measurements are performed independently at the National Research Council of Canada. All measurement data and graphical information displayed below are the property of the SoundStage! Network and Schneider Publishing Inc. Reproduction in any format is not permitted.
Microphone measuring position: center of midrange
Grille: off
Sensitivity: 86.00dB (averaged 300Hz-3kHz, 2.83V/1m)
Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: on-axis response
Middle curve: 15 degrees off-axis response
Bottom curve: 30 degrees off-axis response
Chart B: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response
20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis
Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 90dB SPL
Bottom curve: THD+N @ 90dB (50Hz - 10kHz)
Chart B: @ 95dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 95dB SPL
Bottom curve: THD+N @ 95dB (50Hz - 10kHz)
Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Chart B: Difference @ 95dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Vertical axis: impedance
Horizontal axis: frequency
Vertical axis: phase
Horizontal axis: frequency
All loudspeaker measurements are performed independently at the National Research Council of Canada. All measurement data and graphical information displayed below are the property of the SoundStage! Network and Schneider Publishing Inc. Reproduction in any format is not permitted.
Microphone measuring position: between tweeter and midrange
Grille: off
Sensitivity: 88.25dB (averaged 300Hz-3kHz, 2.83V/1m)
Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: on-axis response
Middle curve: 15 degrees off-axis response
Bottom curve: 30 degrees off-axis response
Chart B: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response
20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis
Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 90dB SPL
Bottom curve: THD+N @ 90dB (50Hz - 10kHz)
Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Vertical axis: impedance
Horizontal axis: frequency
Vertical axis: phase
Horizontal axis: frequency
All loudspeaker measurements are performed independently at the National Research Council of Canada. All measurement data and graphical information displayed below are the property of the SoundStage! Network and Schneider Publishing Inc. Reproduction in any format is not permitted.
Microphone measuring position: tweeter axis
Grille: n/a
Sensitivity: 90.3dB (averaged 300Hz-3kHz, 2.83V/1m)
Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: on-axis response
Middle curve: 15 degrees off-axis response
Bottom curve: 30 degrees off-axis response
Chart B: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response
20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis
Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 90dB SPL
Bottom curve: THD+N @ 90dB (50Hz - 10kHz)
Chart B: @ 95dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 95dB SPL
Bottom curve: THD+N @ 95dB (50Hz - 10kHz)
Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Chart B: Difference @ 95dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Vertical axis: impedance
Horizontal axis: frequency
Vertical axis: phase
Horizontal axis: frequency
All loudspeaker measurements are performed independently at the National Research Council of Canada. All measurement data and graphical information displayed below are the property of the SoundStage! Network and Schneider Publishing Inc. Reproduction in any format is not permitted.
Microphone measuring position: between tweeter and midrange
Grille: off
Sensitivity: 90.75dB (averaged 300Hz-3kHz, 2.83V/1m)
Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: on-axis response
Middle curve: 15 degrees off-axis response
Bottom curve: 30 degrees off-axis response
Chart B: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response
20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis
Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 90dB SPL
Bottom curve: THD+N @ 90dB (50Hz - 10kHz)
Chart B: @ 95dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 95dB SPL
Bottom curve: THD+N @ 95dB (50Hz - 10kHz)
Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Chart B: Difference @ 95dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Vertical axis: impedance
Horizontal axis: frequency
Vertical axis: phase
Horizontal axis: frequency
All loudspeaker measurements are performed independently at the National Research Council of Canada. All measurement data and graphical information displayed below are the property of the SoundStage! Network and Schneider Publishing Inc. Reproduction in any format is not permitted.
Microphone measuring position: between tweeter and midrange
Grille: off
Sensitivity: 86.25dB (averaged 300Hz-3kHz, 2.83V/1m)
Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: on-axis response
Middle curve: 15 degrees off-axis response
Bottom curve: 30 degrees off-axis response
Chart B: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response
20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis
Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 90dB SPL
Bottom curve: THD+N @ 90dB (50Hz - 10kHz)
Chart B: @ 95dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 95dB SPL
Bottom curve: THD+N @ 95dB (50Hz - 10kHz)
Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Chart B: Difference @ 95dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Vertical axis: impedance
Horizontal axis: frequency
Vertical axis: phase
Horizontal axis: frequency
All loudspeaker measurements are performed independently at the National Research Council of Canada. All measurement data and graphical information displayed below are the property of the SoundStage! Network and Schneider Publishing Inc. Reproduction in any format is not permitted.
Microphone measuring position: tweeter axis
Grille: off
Sensitivity: 86.0dB (averaged 300Hz-3kHz, 2.83V/1m)
Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: on-axis response
Middle curve: 15 degrees off-axis response
Bottom curve: 30 degrees off-axis response
Chart B: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response
20Hz - 20kHz (measured @ 2m, plotted @ 1m)
Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis
Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)
Top curve: frequency response @ 90dB SPL
Bottom curve: THD+N @ 90dB (50Hz - 10kHz)
Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)
Vertical axis: impedance
Horizontal axis: frequency
Vertical axis: phase
Horizontal axis: frequency
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