Dynaudio Confidence C4 Loudspeakers: MeasurementsChart 1 - Frequency Response and Sensitivity |
Microphone measuring position: between tweeters Sensitivity: 88.0dB (averaged 300Hz-3kHz, 2.83V/1m) Frequency response, 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
![](http://www.soundstagemagazine.com/measurements/dynaudio_confidence_c4/frequency_on1530.gif) Top curve: on-axis response Middle curve: 15 degrees off-axis response Bottom curve: 30 degrees off-axis response Frequency response, 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
![](http://www.soundstagemagazine.com/measurements/dynaudio_confidence_c4/frequency_456075.gif) Top curve: 45 degrees off-axis response Middle curve: 60 degrees off-axis response Bottom curve: 75 degrees off-axis response Chart 2 - Listening Window |
Listening Window, 20Hz - 20kHz (measured @ 2m, plotted @ 1m)
![](http://www.soundstagemagazine.com/measurements/dynaudio_confidence_c4/frequency_listeningwindow.gif) 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 3 - Total Harmonic Distortion + Noise |
THD+N @ 90dB, 50Hz - 10kHz (measured @ 2m)
![](http://www.soundstagemagazine.com/measurements/dynaudio_confidence_c4/thd_90db.gif) Top curve: frequency response @ 90dB SPL Bottom curve: THD+N @ 90dB (50Hz - 10kHz) Additional Measurement THD+N @ 95dB, 50Hz - 10kHz (measured @ 2m)
![](http://www.soundstagemagazine.com/measurements/dynaudio_confidence_c4/thd_95db.gif) Top curve: frequency response @ 95dB SPL Bottom curve: THD+N @ 95dB (50Hz - 10kHz) Chart 4 - Impedance Magnitude Variation and Electrical Phase |
Impedance curve
![](http://www.soundstagemagazine.com/measurements/dynaudio_confidence_c4/impedance.gif) Vertical axis: impedance Horizontal axis: frequency Electrical phase
![](http://www.soundstagemagazine.com/measurements/dynaudio_confidence_c4/electrical_phase.gif) Vertical axis: phase Horizontal axis: frequency
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