Assessments - 3, GPA: 3.7
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2 Description................... ..................3 Connections ............................................................................................................3 Control Functions....................................................................................................3,4 Equalization..............................................................................................................4 Custom Low-Frequency Modules............................................................................4 Module Construction................................................................................................5 Non-Standard Crossover Frequencies....................................................................5 Output Transformers.........................................................................................5 Figures ....................................................................................................................6 Linkwitz-Riley Filter Advantages..............................................................................7 PC Board .................................................................................................8 Schematic................................................................................................................9 Schematic.................................................................................................10 Schematic................................................................................................................11 Parts List..................................................................................................................12 Repair Parts/Warranty..............................................................................................13 one Ey XEQ-3 SERVICE MANUAL Specifications SPECIFICATIONS CHANNEL CONFIGURATION — Monaural three-way, switchatte to monaural two-way FILTER TYPE — Fourth-order Linkwitz-Riley (24-dB-per-octave attenuation) CROSSOVER FREQUENCIES, SWITCH SELECTABLE — (See text for other possible frequencies) Low-Mid: 80. 125, 150. 250. 500 and 800 Hz Mid-High: 500. 800. 1250, 1600. 5000 and 8000 Hz OUTPUT DELAYS — Type: Fourth-order all-pass, continuously variable time constant, linear control scale Range: Low: 6 fis ("0") to 6 ms Mid: 1 )iS ("0”) to 1 ms High: 0.3 ms ("0") to 0 3 ms INFRASONIC SPEAKER PROTECTION — Filter Type: Second-order BuSerworth (12-dB-per-octave slope) Corner Frequencies: 16 or 32 Hz. provided by supplied HP16/32 plug-in module (see text for other frequencies) EQUALIZATION FOR •‘STEP-DOWN” OPERATION OF TL BASS SPEAKER SYSTEMS — Filter Type: Second-order underdamped (12-dB-per-octave rolloff below plus-6-dB peak-boost frequency) Peak-Boost Frequencies: 29. 35. 45 and 60 Hz provided by optional EB29/35 and EB45/60 plug-in modules (see text for other frequencies) EQUALIZATION OF MID- AND HIGH-FREQUENCY OUTPUTS, PROVIDED BY PLUG-IN MODULE — Normally Supplied: EQF module (for flat electnval frequency resoonse) Optional Modules, for Flat Acoustic Response of Compression Drivers on Constant-DirectMty Horns: EQA, EQB.. (see Table 1 for complete list) INPUT -Type: Active differential Maximum Level: +18 dBu Impedance: 20,000 ohms Common-Mode Range: ±24 V (net of signal voltage) Common-Mode Rejection Ratio, Typical: -S5 dB Connector: Female 3-pin XLR type MAIN OUTPUTS — Type: Floating differential (TRB-2 set of three isolation transformers available: see text) Maximum Level: +18 dBu Impedance: 100 ohms Minimum Load Impedance for Full Output Level: 600 ohms Protection: Safe for short circuit or ±25 volts dc Connectors: Male 3-pin XLR type LOW-MIX (COMMON-BASS) OUTPUT — Impedance: '.800 ohms Connector: RCA-type phono jack GAIN — Level Controls at Center Detent: Unity Adjustment Range re Unity Gain, Continuously Variable: ±12 dB FREQUENCY RESPONSE, SUM OF OUTPUTS, LEVEL CONTROLS AT CENTER DETENT, 2,000-0нм LOADS — 20-20.000 Hz ±0.5 dB TOTAL HARMONIC DISTORTION, 20-20,000 Hz — Typical: 0.02% Maximum: 0 1% NOISE, EACH OUTPUT, CONTROLS FLAT, 20-20,ООО-Hz NOISE BANDWIDTH — Typical: -90 dBu CHANNEL CROSSTALK — Typical: -78 dB TRANSIENT PERFORMANCE — Not limited by slew rate or power bandwidth under normal operating condition. 20-20.000 Hz LED LEVEL INDICATORS - (Level-dependent brightness provides enhanced resolution) Green: Input level above -20 dBu Yellow: Input level above 0 dBu Red: Input or any output level above +16 dBu FRONT-PANEL CONTROLS — Each Output: Gain, delay, polarity and channel mute CHASSIS CONSTRUCTION — Painted aluminum COLORS - Black with white graphics MOUNTING — Standard 19-tn. rack panel, 1% in high, 7 in. deep behind panel SUPPLIED ACCESSORIES - HP 16/32 plug-in high-pass filter module for 16- or 32-Hz low-frequency protection, BMK blank plug-in module for construction of custom modules; smoked acrylic security cover OPTIONAL ACCESSORIES — EQA. EQB .. . piug-i...