Hafler GX2800 GX2800CE Owners Manual

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Extracted text from Hafler GX2800 GX2800CE Owners Manual (Ocr-read)

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Declaration of Conformity Application of Council Directive: 73/23/EEC (low voltage directive) Application of Council Directive: 89/336/EEC (EMC Directive) Standard(s) to which Conformity is Declared: EN55103 -1 (Emissions) EN55103 -2 (Immunity) EN60065 (Safety) Manufacturers Name: Hafler Manufacturers Address: 546 South Rockford Drive, Tempe, Arizona 85281 Importers Name: Importers Address: Type of Equipment: 2-channel Audio Power Amplifier Model No.: GX2800CE Serial Number: Year of Manufacturing: 2000 2001 2002 2003 2004 I, the undersigned, hereby declare that the equipment specified above conforms to the above Directive(s) and Standard(s) Place: Hafler Date: 5/1/2000 James C. Strickland, VP Engineering

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– 1– Table of Contents DECLARATION OF CONFORMITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . inside cover SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 TECHNICAL DESIGN FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9 Why a new amplifier topology? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 What else distinguishes these amplifiers? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Universal Line Voltage Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Protection Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 DESIGN FEATURES – GX2800 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 DESIGN FEATURES – GX2800CE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Power/Thermal Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 AC Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Audio Ground Chassis/Float Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-17 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Daisy Chain Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Earth Grounded Source Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Floated Source Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Crossover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 CD Horn Equalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Biamp/Stereo Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Level Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Stereo/Mono 70V 100V Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 Load Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 Thermal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 Clipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18-20 Stereo Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Biamp Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 Bridge Mono Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 70V Mono Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 100V Mono Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 70V Stereo Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 SERVICE POLICY AND LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

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– 13– AUDIO GROUND CHASSIS/FLOAT SWITCH In general, the Audio Ground of each amplifier should be connected to AC mains earth ground AT ONE POINT ONLY- either through the Chassis (by selecting the "Chassis" position) OR through the input cable (with the switch in the "Float" position, and pin 1 of the XLR or the sleeve of the 1/4" connected to the ground of the signal source unit.) The Chassis/Float switch can be used as a means to troubleshoot ground loop problems, or to verify wiring. Ground loops are characterized by a hum or buzz through the speakers, and occur when multiple paths exist for a given ground circuit. This switch allows the Audio Ground to be temporarily "lifted" or "floated" from the chassis, so continuity tests can be made to verify or reverse-engineer a grounding system. The following information will be useful when planning or troubleshoot- ing system wiring: - The chassis is permanently conected to the earth (safety) ground pin of the Mains power connector. - The Audio Ground of each GX2800 is permanently connected to the black terminals of both output binding posts, to pin 1 of each XLR input, and to the sleeve of each 1/4" input. - The XLR shell is permanently connected to chassis. - With the Chassis/Float switch in the "Chassis" position, the Audio Ground will be connected to the Chassis and AC mains earth ground. This connection is made through a 0Ωresistor (R350) located on the input board. The resistor serves as a fuselink in the case of severe system faults. To check this resistor, remove all connectors from the amplifier and discon- nect the AC main plug. With the switch in the "Chassis" position, use an ohmmeter to measure the 0Ωresistance between the earth ground pin of the AC mains plug and Audio Ground at either black terminal of the output binding posts. - By selecting the Float position, the Audio Ground is not directly connected to the chassis, and can be referenced to some other ground through the input cable or speaker ground. For safety reasons, a 0.1uF capacitor (C125) permanently connects Audio Ground to chassis at RF frequencies, but only presents 27kΩof impedance at 60Hz. OUTPUT The speaker output connectors are dual binding posts which will accept wire up to 12 AWG, or spade connectors. They are spaced on 3/4" centers for use with dual banana plugs. The positive output red terminals are oriented such that a dual banana plug can be used for bridged mono operation. POWER SWITCH The power switch is located on the front of the amplifier. Two green "Power" LEDs indicate that the corresponding amplifier channel is turned on. Standard practice is to turn the amplifier on last , and off first when powering your system on and off. This insures that any turn on/off glitches in source components or signal processing equipment will occur before the ampli- fier is turned on , or after it is turned off . It is possible to leave the power switch on at all times and switch the amplifier remotely with a breaker switch or other AC power switch. When doing so make sure the switch is rated for the current required by the amplifier. !

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– 14– The amplifier will operate with either a balanced or unbalanced signal source. INPUT The input jacks used on the GX2800 are dual function connectors which accept 1/4" TRS (Tip Ring Sleeve) or male XLR plugs. The amplifier will operate with either a balanced or unbalanced signal, from earth ground or floated source equip- ment. To determine if your equipment is earth grounded or floated, consult the owners manual or test with an ohmmeter. The signal connections are as follows: DAISY CHAIN OUTPUT Proper cable wiring will be determined by the source equipment that is feeding signal to the amplifier. EARTH GROUNDED SOURCE EQUIPMENT Source Units with a 3-pin mains power cord will typically have the audio output ground connected to the earth-grounded chassis. This can be verified with an ohmmeter by disconnecting the mains power cord from the AC outlet and checking for continuity between the earth ground pin and the audio output ground. This test should be done with the equipment installed in the complete system, including cables. If the audio output ground is connected to the earth ground pin, it is earth grounded equipment. Consult the following diagrams for examples of recommended wiring techniques: Tip Ring Sleeve Tip Sleeve sleeve shorts amplifier - input to audio ground 1/4" Mono Unbalanced 1/4" TRS Balanced XLR Balanced Operation Shield Chassis Audio Ground XLR, 1/4" TRS Amplifier SHIELDED TWISTED PAIR GROUNDED, BALANCED SOURCE shield connected at one end only 1 3 2 Shield Chassis Audio Ground XLR, 1/4" TRS Amplifier SHIELDED TWISTED PAIR GROUNDED, UNBALANCED SOURCE shield connected at one end only 1 3 2 Shield Float Audio Ground XLR, 1/4" Mono Amplifier 1/4" Mono: sleeve shorts - input to Audio Ground; XLR: short pins 1 & 3 together COAX OR TWISTED PAIR GROUNDED, UNBALANCED SOURCE 2 3 1

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– 19– 1. Connect signal from source to CH B input. 2. Biamp/Stereo switch not active-(Stereo/Mono switch overrides this switch when in mono/70V/100V mode). 3. Move Stereo/Mono switch to MONO mode. 4. Set load switches (8Ω/4Ω/2Ω) to 1/2 the actual load impedance. (16Ω/8Ω/4Ω) i.e. for a 4Ωspeaker load, select the 2Ωsetting for both CH A and CH B Load Switches5. Connect appropriate speaker load 16Ω/8Ω/4Ωacross the red terminals of the 5-way binding posts. CE units: Wire SPEAKON as shown above and connect to CH A output. 6. CH B level control adjusts the mono output level. BRIDGE MONO MODE CE SPEAKON Connector Wiring Connect to CH A output 1. Connect signal from source to CH B input. 2. Biamp/Stereo switch not active (Stereo/Mono switch overrides this switch when in mono/70V/100V mode). 3. Move Stereo/Mono switch to 70V mode. 4. Select 70V load, both channels.5. Connect parallel array of 70V transformer-equipped speakers across the red terminals of the 5-way binding posts. CE units: Wire SPEAKON as shown above and connect to CH A output. 6. CH B input sensitivity controls 70V mono output level. Amplifier will clip at 70Vrms level. 70V MONO MODE CE SPEAKON Connector Wiring Connect to CH A output