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NRC Measurements: KEF LS50 Loudspeakers

Details
Parent Category: Products
Category: Loudspeaker Measurements
Created: 15 April 2013

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.

Setup

Microphone measuring position: tweeter axis
Grille: n/a

Frequency response and sensitivity

Sensitivity: 84.25dB (averaged 300Hz-3kHz, 2.83V/1m)

Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_on1530

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)

fr_456075

Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response

Listening window

20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_listeningwindow

Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis

Total Harmonic Distortion + Noise

Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)

thd_90db

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

Deviation from linearity

Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)

dev_90db

Impedance magnitude variation

impedance

Vertical axis: impedance
Horizontal axis: frequency

Electrical phase

electrical_phase

Vertical axis: phase
Horizontal axis: frequency 

NRC Measurements: Atlantic Technology AT-2 Loudspeakers

Details
Parent Category: Products
Category: Loudspeaker Measurements
Created: 01 April 2013

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.

Setup

Microphone measuring position: between tweeter and midrange-woofer
Grille: off
Tweeter switch: middle position

Frequency response and sensitivity

Sensitivity: 82.9dB (averaged 300Hz-3kHz, 2.83V/1m)

Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_on1530

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)

fr_456075

Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response

Listening window

20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_listeningwindow

Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis

Total Harmonic Distortion + Noise

Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)

thd_90db

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

Deviation from linearity

Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)

dev_90db

Impedance magnitude variation

impedance

Vertical axis: impedance
Horizontal axis: frequency

Electrical phase

electrical_phase

Vertical axis: phase
Horizontal axis: frequency 

NRC Measurements: Music Culture Elegance RL21 Loudspeakers

Details
Parent Category: Products
Category: Loudspeaker Measurements
Created: 01 March 2013

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.

Setup

Microphone measuring position: top of midrange-woofer surround (manufacturer specified)
Grille: off

Frequency response and sensitivity

Sensitivity: 86.7dB (averaged 300Hz-3kHz, 2.83V/1m)

Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_on1530

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)

fr_456075

Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response

Listening window

20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_listeningwindow

Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis

Total Harmonic Distortion + Noise

Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)

thd_90db

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

Deviation from linearity

Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)

dev_90db

Impedance magnitude variation

impedance

Vertical axis: impedance
Horizontal axis: frequency

Electrical phase

electrical_phase

Vertical axis: phase
Horizontal axis: frequency 

NRC Measurements: Focal Electra 1008 Be 2 Loudspeakers

Details
Parent Category: Products
Category: Loudspeaker Measurements
Created: 01 February 2013

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.

Setup

Microphone measuring position: tweeter axis
Grille: off

Frequency response and sensitivity

Sensitivity: 86.50dB (averaged 300Hz-3kHz, 2.83V/1m)

Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_on1530

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)

fr_456075

Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response

Listening window

20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_listeningwindow

Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis

Total Harmonic Distortion + Noise

Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)

thd_90db

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

Chart B: @ 95dB, 50Hz - 10kHz (measured @ 2m)

thd_95db

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

Deviation from linearity

Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)

dev_90db

Chart B: Difference @ 95dB from 70dB, 50Hz - 20kHz (measured @ 2m)

dev_95db

Impedance magnitude variation

impedance

Vertical axis: impedance
Horizontal axis: frequency

Electrical phase

electrical_phase

Vertical axis: phase
Horizontal axis: frequency 

NRC Measurements: Polk Audio LSiM703 Loudspeakers

Details
Parent Category: Products
Category: Loudspeaker Measurements
Created: 15 October 2012

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.

Setup

Microphone measuring position: between tweeter and midrange driver
Grille: off

Frequency response and sensitivity

Sensitivity: 85.2dB (averaged 300Hz-3kHz, 2.83V/1m)

Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_on1530

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)

fr_456075

Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response

Listening window

20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_listeningwindow

Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis

Total Harmonic Distortion + Noise

Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)

thd_90db

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

Deviation from linearity

Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)

dev_90db

Impedance magnitude variation

impedance

Vertical axis: impedance
Horizontal axis: frequency

Electrical phase

electrical_phase

Vertical axis: phase
Horizontal axis: frequency 

NRC Measurements: Fluance XL7F Loudspeakers

Details
Parent Category: Products
Category: Loudspeaker Measurements
Created: 01 October 2012

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.

Setup

Microphone measuring position: tweeter axis
Grille: off

Frequency response and sensitivity

Sensitivity: 86.0dB (averaged 300Hz-3kHz, 2.83V/1m)

Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_on1530

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)

fr_456075

Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response

Listening window

20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_listeningwindow

Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis

Total Harmonic Distortion + Noise

Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)

thd_90db

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

Deviation from linearity

Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)

dev_90db

Impedance magnitude variation

impedance

Vertical axis: impedance
Horizontal axis: frequency

Electrical phase

electrical_phase

Vertical axis: phase
Horizontal axis: frequency 

NRC Measurements: MartinLogan Motion 40 Loudspeakers

Details
Parent Category: Products
Category: Loudspeaker Measurements
Created: 01 October 2012

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.

Setup

Microphone measuring position: tweeter axis
Grille: off

Frequency response and sensitivity

Sensitivity: 88.0dB (averaged 300Hz-3kHz, 2.83V/1m)

Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_on1530

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)

fr_456075

Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response

Listening window

20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_listeningwindow

Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis

Total Harmonic Distortion + Noise

Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)

thd_90db

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

Deviation from linearity

Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)

dev_90db

Impedance magnitude variation

impedance

Vertical axis: impedance
Horizontal axis: frequency

Electrical phase

electrical_phase

Vertical axis: phase
Horizontal axis: frequency 

NRC Measurements: KEF R500 Loudspeakers

Details
Parent Category: Products
Category: Loudspeaker Measurements
Created: 01 August 2012

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.

Setup

Microphone measuring position: tweeter axis
Grille: off

Frequency response and sensitivity

Sensitivity: 86.75dB (averaged 300Hz-3kHz, 2.83V/1m)

Chart A: 20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_on1530

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)

fr_456075

Top curve: 45 degrees off-axis response
Middle curve: 60 degrees off-axis response
Bottom curve: 75 degrees off-axis response

Listening window

20Hz - 20kHz (measured @ 2m, plotted @ 1m)

fr_listeningwindow

Response curve is an average of five measurements: on-axis, 15 degrees left and right off-axis, 15 degrees up and down off-axis

Total Harmonic Distortion + Noise

Chart A: @ 90dB, 50Hz - 10kHz (measured @ 2m)

thd_90db

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

Chart B: @ 95dB, 50Hz - 10kHz (measured @ 2m)

thd_95db

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

Deviation from linearity

Chart A: Difference @ 90dB from 70dB, 50Hz - 20kHz (measured @ 2m)

dev_90db

Chart B: Difference @ 95dB from 70dB, 50Hz - 20kHz (measured @ 2m)

dev_95db

Impedance magnitude variation

impedance

Vertical axis: impedance
Horizontal axis: frequency

Electrical phase

electrical_phase

Vertical axis: phase
Horizontal axis: frequency 

  1. NRC Measurements: Definitive Technology StudioMonitor 55 Loudspeakers
  2. NRC Measurements: PMC twenty.24 Loudspeakers

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Equipment-Review Archives

The following categories containing listings of all product reviews published by the SoundStage! Network since 1995 from all of our online publications. The products are divided into categories and listed in descending order by date. There is no Search function within the listings, but you can search by bringing up the page with the appropriate list and using the "Find" command on your browser. (For Internet Explorer select: Edit > Find on this Page.)

Loudspeaker Measurements

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Subwoofer Measurements

Headphone Amplifier Measurements

Amplifier Measurements

Preamplifier Measurements

Phono Preamplifier Measurements

Digital-to-Analog Converter Measurements

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