Australian HiFi – July 2019

Australian Hi-Fi 25

Dynaudio Evoke 50 Loudspeakers

Graph1.Frequencyresponse.Tracebelow900Hzis theaveragedresultofnineindi-

vidualfrequencysweepsmeasuredatthreemetres,withthecentralgridpointon-axis

withthetweeterusingpinknoiseteststimuluswithcaptureunsmoothed.Thishas

beenmanuallyspliced(at900Hz)tothegatedhigh-frequencyresponse,anexpanded

viewofwhichis showninGraph2.

Graph3.Low frequencyresponseof front-firingbass reflexport withoutbung(red

trace)andwithhalfbung(bluetrace)andwooferwithoutbung(blacktrace)andwith

full bung(bluetrace).Nearfieldacquisition.Port/wooferlevelsnot compensatedfor

differencesinradiatingareas.

Graph5.Impedancemodulusshowingfullbung(greentrace)vshalfbung(redtrace).

Graph7.Lowfrequencyresponseoflowerwoofer(redtrace),upperwoofer(blue

trace)and midrangedriver(greentrace).Nearfieldacquisition.

Graph2.High-frequencyresponse,expandedview,withoutgrille(blacktrace)and

withgrilleinplace(redtrace).Teststimulusgatedsine.Microphoneplacedatthree

metreson-axiswithdometweeter.Lowermeasurementlimit600Hz.

Graph4.Impedancemodulusshowingopenport(greentrace)vsfullbung(redtrace),

plusphase(bluetrace).

Graph6.Impedancemodulusshowingopenport(greentrace)vshalfbung(redtrace).

Graph8.Compositeresponseplot. Red traceis outputof bass reflexport.Darkblue

traceis anechoicresponseofupperbassdriver.Greentraceis sineresponseofmid-

rangedriver.Blacktraceis averagedin-roompinknoiseresponse.

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dBSPL

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(^110) Newport Test Labs
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(^110) Newport Test Labs
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(^110) Newport Test Labs
10 Hz 20 50 100 200 500 1K 2K 5K 10K 20K 40K
Ohm
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78
(^109)
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Newport Test Labs
10 Hz 20 50 100 200 500 1K 2K 5K 10K 20K 40K
Ohm
2
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78
(^109)
20
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Newport Test Labs
10 Hz 20 50 100 200 500 1K 2K 5K 10K 20K 40K
Ohm
2
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89
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(^60) Newport Test Labs
20 Hz 50 100 200 500 1K 2K 3K
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Newport Test Labs
20 Hz 50 100 200 500 1K 2K 5K 10K 20K 40K
dBSPL
50
55
60
65
70
75
80
85
90
95
100
105
(^110) Newport Test Labs