Usl JSD-100 Dokumentacja Pobierz pdf (Strona 33)

Page32

x Equalizer.TheJSD100equalizerallowsthefrequencyresponseoftheJSD100tobeadjustedforthe

acousticsoftheroom.Theequalizerincludespresetsforaflatresponse,a"peaktopeak"response,

a"zigzag"response,andan"XCurve."Youwouldusuallystartequalizationfromtheflatresponseor

theXCurveresponse.Thepeaktopeakandzigzagresponsesareonlyusedtoprovideaquickcheck

oftheequalizer.NotethattheXCurvebuttondoesnotautomaticallyequalizetheroom.Instead,it

setstheequalizertoanXCurveresponse.Sincetheroomisnotflat,adjustmentswillhavetobe

madefromthesesettingstoprovidethedesiredcurve.



Usingtheinternalpinknoisegeneratorandtheinternalrealtimeanalyzer(RTA),theequalizeris

adjustedsotheRTAshowstheresponsespecifiedastheXcurveinSMPTE202M1998.Thecurve

callsforaflatresponsebetween63Hzand2kHzwiththelevelfallingoffatthelowandhighends.

ThetablebelowlistsidealXcurvelevelsbasedonthenumberofseatsintheauditorium.Formore

details,consultSMPTE202M1998.



XCurveResponseindB(SMPTE202M1998)

Frequency

(Hz)

NumberofSeats

30 150 500 1000 1500 2000

40 2 2 2 2 2 2

50 1 1 1 1 1 1

63–2k 0 0 0 0 0 0

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 50 51

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Usl JSD-100 Dokumentacja Strona 33