July 2004

Ascendo System Z-f3 Loudspeakers: Measurements

PLEASE NOTE: Our standard is to provide the THD+N measurement at 90dB with a measuring distance of 2 meters (within the anechoic chamber). Since this speaker produced low distortion levels under those conditions, we have added a second measurement performed at 95dB to give an indication of performance under higher-output conditions.

ADDITIONAL NOTE: This speaker has two switches that alter the output of the tweeter and the woofer. All standard measurements were done with the switches in the manufacturer-recommended position: tweeter set to "H" and woofer set to "N." An additional frequency measurement was performed and is shown below with the tweeter set to "N" and the woofer set to "H" to show output variations.

All  loudspeaker measurements are performed independently at the National Research Council of Canada. Please click to learn more about how we test loudspeakers there. All measurement data, including graphical information displayed below, is the property of SoundStage!. Reproduction in any format is not permitted.

Microphone measuring position: tweeter axis

Grille: none

Sensitivity: 87.0dB (averaged 300Hz-3kHz, 2.83V/1m)

Frequency response, 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

Frequency response, 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

Additional Measurement
Frequency response, 20Hz - 20kHz (measured @ 2m, plotted @ 1m)

Black: on-axis frequency response with tweeter "H" and woofer "N"
Red: on-axis frequency response with tweeter "N" and woofer "H"

Listening Window, 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

THD+N @ 90dB, 50Hz - 10kHz (measured @ 2m)

Top curve: frequency response @ 90dB SPL
Bottom curve: THD+N @ 90dB (50Hz - 10kHz)

Additional Measurement
THD+N @ 95dB, 50Hz - 10kHz (measured @ 2m)

Top curve: frequency response @ 95dB SPL
Bottom curve: THD+N @ 95dB (50Hz - 10kHz)

Impedance curve

Vertical axis: impedance
Horizontal axis: frequency

Electrical phase

Vertical axis: phase
Horizontal axis: frequency

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