ElectroVoice-EQ231-eq-维修说明书手册含电器原理图

ElectroVoicea MARK IV company周第理是是1是得贵题果W开真美果其复其E是复其真其发a最b备4akh是E0-231Graphic EqualizerGENERAL SPECIFICATIONSOverall Dimensions (see Figure 1):FILTER SPECIFICATIONSConditions:88 mm(3.46 in.)high;Type:1.0 dBu 0.775 volts rms.483 mm (19.0 in.)wide:Variable-Q active filter set2.120 volt ac line input voltage maintained235 mm (9.24 in.)deepCenter Frequencies(31 bands on ISO one-for all tests unless noted.Net Weight:third-octave centers for each channel):3.0 dBm -1 mW into 600 ohms.4.0kg(B.81b)20,25,32.40.50.63.80,100.125.160Frequency Response at Unity Gain,200.250.315.400,500.630,800.1,000High-Pass Filter DisengagedINPUT SPECIFICATIONS1.250.1.600.2.000.2,500,3.150.4,000,(see Figure 4):Type:5.000,6.300.8,000,10.000,12,500,20Hz-20,000Hz±1dBElectronically balanced16,000and20,000HzTotal Harmonic Distortion at Unity Gain,Impedance,Maximum Boost/Cut20-20,000 Hz,0 dBu Output:Unbalanced:12 dB<0.01%22,000ohmsInfrasonic Low-Cut Filter,Noise at Unity Gain:Balanced:Corner Frequency(3 dB down):<-97 dBm A-weighted44.000ohms43 HzFront-Panel Controls,Each Channel:Maximum Input Level at Unity Gain:Slope:31 center-detent boost/cut slide controls;+20 dBu (7.75 Vrms)18 dB per octavelevel control with center detent;low-cutConnectors,select switch;range select switch:EQ-onType:DESCRIPTIONswitchParallel female 3-pin XLR-type and 1/4-inThe Electro-Voice EQ-231 is a boost-and-cutLED Indicators,Each Channel:phone jack TRS,balanced or unbalancedstereo '/-octave graphic equalizer whosePeak output level:6-or 12-dB range andXLR-type Connector Formatprimary use is for tuning the overall frequencyEQ on(IEC Standard 268):response of a sound reinforcement system,Chassis Construction:Pin 1 shield;both to increase gain-before-feedback and toPainted steelPin 2 high;compensate for the deficiencies in theColors:Pin 3 lowacoustic environment and the sound system.Gray front panel with white nomenclature;black top,sides,rear and bottom.OUTPUT SPECIFICATIONSFEATURESMounting:Type:The variable-Q active filter sets used in theStandard 19-in.rack.3.46 in.high,9.24 in.Electronically balanced XLR-type;EQ-231 allow effective equalization with fewdeep behind mountunbalanced 14-inchproblematic side effects.As Figure 1Supplied Accessories:Impedance,illustrates,the filter characteristics vary withPower cord;one package of mountingBalanced:the amount of boost or cut used.At lowscrews;one package of rubber feet:one120 ohmscontrol settings,the filter Q is very wide.Asdecal and fuse for 230-V ac operation;Unbalanced:the control is boosted or cut,the filter Qowner's manual and service information60 ohmsnarrows so that there is minimum interactionOperating Environment:Maximum Output Level:between adjacent frequency bands.Upto50°C(122F)+20 dBuEach of the 31 1-octave filters per channelPower Requirements:provides 12 dB of boost or cut at ISO110 or 220 V ac,50/60 Hz,18 wattsfrequencies 20 through 20,000 Hz(see