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Crate Amplifiers GT-80D - page 1
QuadraDrive tm Amplifier with Digital Sound Pr ocessing OWNER’S MANUAL ...
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Crate Amplifiers GT-80D - page 2
GT -80D QuadraDrive tm 2 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. A TTENTION RISQUE D'ELECTROCUTION NE PAS OUVRIR ATTENTION: POUR REDUIRE D'ELECTROCUTION NE PAS ENLEVER LE COUVERCLE. AUCUN ...
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Crate Amplifiers GT-80D - page 3
GT -80D QuadraDrive tm GT -80D QuadraDrive tm 3 ABOUT THE GT -80D: The Crate GT -80D QuadraDrive tm with Digital Sound Processing is truly unique and versatile, offer- ing you more performance and flexibility than any other compact amplifier . Start with two completely separate preamp stages: Solid State and Tube . Then add the two channels: Clean ...
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Crate Amplifiers GT-80D - page 4
GT -80D QuadraDrive tm 4 1: INPUT : Connect your guitar here using a shielded instrument cable. OVERDRIVE Gains: 2: TUBE GAIN: This serves as the gain control for the Overdrive Channel’ s T ube preamp section, giving you con- trol over the compression and overdrive characteristics of the GT -80DSP’s input tubes. Use this control along with the ...
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Crate Amplifiers GT-80D - page 5
GT -80D QuadraDrive tm 5 9: CLEAN LED: This LED glows green when the Clean Channel is chosen, and along with LED #19, gives you a visual sign that the Clean gains, tone controls and volume control are active. 10: SOLID ST A TE GAIN: This serves as the gain control for the Clean Channel’s Solid State preamp section. Use this control along with the ...
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Crate Amplifiers GT-80D - page 6
GT -80D QuadraDrive tm 6 18: HIGH: Adjust the Clean Channel’s high frequency output with this control: in the center position the high fre- quency output will be “flat” (no boost or cut). T urning the control to the left reduces the high frequency output; turn- ing it to the right increases the high frequency output. The High control covers a ...
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Crate Amplifiers GT-80D - page 7
26: POWER CORD: Firmly plug the supplied, heavy-duty grounded power cord into this receptacle. When in use, be sure this cord is properly plugged into a safely-wired, grounded 120 volt, 60 cycle AC power outlet. DO NOT attempt to defeat the ground connection on this cable! If your GT -80D was purchased outside of the United States, see the unit’s ...
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Crate Amplifiers GT-80D - page 8
GT -80D QuadraDrive tm 8 The Digital Sound Processor ’s 32 position Mode control allows you to instantly access the exact type of effect you want - from classic reverberation to radical “backwards” sounds - for any of the preamp or channel settings. The diagram below illustrates where each “family” of ef fects is located. Use this diagram ...
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Crate Amplifiers GT-80D - page 9
GT -80D QuadraDrive tm 9 The table below lists each of the 32 settings of the GT -80D’s Mode control, along with a brief explanation of each effect. T able of Settings: ABOUT THE DIGIT AL SOUND PROCESSOR: NO. NAME TYPE DESCRIPTION 0 OFF NONE Bypass—no signal processing occurs. 1 SMALL ROOM, BRIGHT SMALL REVERB 8’ x 8’ empty room with hardwo ...
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Crate Amplifiers GT-80D - page 10
GT -80D QuadraDrive tm 10 (Semi-) T echnical Description: ABOUT THE DIGIT AL SOUND PROCESSOR: “What is reverb, anyway?” Imagine yourself seated in a small, lightly furnished room, about to enjoy a private performance by your favorite guitarist. The guitarist picks up an acoustic guitar and sharply strikes a single chord, then immediately mutes ...
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Crate Amplifiers GT-80D - page 11
GT -80D QuadraDrive tm 11 ABOUT THE DIGIT AL SOUND PROCESSOR: Block Diagrams: Sound Amplitude T ime TYPICAL REVERB RESPONSE TO AN IMPULSE EARL Y RELECTIONS REVERB (DECA Y) TIME PRE- DELA Y REVERB "T AIL" GA TED REVERB REVERSE REVERB EFFECT Time domain response of a reverse reverb, impulse input. Reverb effect is digitally reversed to prod ...
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Crate Amplifiers GT-80D - page 12
GT -80D QuadraDrive tm 12 SP ARKLING CLEAN: FUNKY CLEAN: W ARM TUBE: BLUESY DIRT : OUT OUT OUT OUT OUT IN OUT IN SOME SUGGESTED SETTINGS: ...
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Crate Amplifiers GT-80D - page 13
GT -80D QuadraDrive tm 13 W ARM TUBE CRUNCH: HOT TUBE LEAD: SOLID ST A TE LEAD: SOLID ST A TE CRUNCH: IN IN IN IN IN OUT IN OUT ...
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Crate Amplifiers GT-80D - page 14
GT -80D QuadraDrive tm GT -80D QuadraDrive tm 14 SYSTEM BLOCK DIAGRAM: LED MODE INPUT 12" CRATE CUSTOM SPEAKER EXTERNAL SPEAKER LEVEL POWER AMP LINE OUT LINE IN LED LED LED LED TUBE CLEAN GAIN TUBE 0VERDRIVE GAIN S.S. CLEAN GAIN S.S. OVERDRIVE GAIN CHANNEL TUBE LED SOLID STATE LOW MID HIGH MASTER CLEAN TONES & MASTER LED LOW MID HIGH MASTE ...
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Crate Amplifiers GT-80D - page 15
GT -80D QuadraDrive tm ...
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Crate Amplifiers GT-80D - page 16
Output Power Rating 80 watts RMS @ 5% THD 8 ohm load, 120 V AC Gain 88dB, tones @ “5” @ 1kHz T one Control Range Overdrive Channel Low 24dB range @ 100Hz Mid 10dB range @ 1kHz High 20dB range @ 5kHz Clean Channel Low 23dB range @ 100Hz Mid 14dB range @ 800Hz High 30dB range @ 10kHz Signal T o Noise Ratio Overdrive Channel Solid State 61dB T ube ...
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