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tm
QuadraDrive
Amplifier with
Digital Sound Processing
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tm GT-80D QuadraDrive Congratulations! You are now the proud owner of one of the newest and most innovative guitar amplifiers available, the tm Crate GT-80D QuadraDrive with Digital Sound Processing. This versatile and compact amplifier fea- tures four separate, footswitchable Gain controls, with your choice of Tube or Solid State preamps for either the Clean or the Overdrive channel. Discrete tones and Master Level controls for each channel, along with Crate’s exclusive Tube Driven Mosfet power
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tm tm GT GT-80D -80D QuadraDrive QuadraDrive ABOUT THE GT-80D: tm The Crate GT-80D QuadraDrive 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 and Overdrive. Put them together and you have your choice of some of the hottest contemporary sounds and the coolest vintage sounds available. For example, S
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tm GT-80D QuadraDrive THE GT-80D FRONT PANEL: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 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 Tube 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 Overdrive Channel’s volume control (#15) to create a wide variety of so
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tm GT-80D QuadraDrive 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 STATE GAIN: This serves as the gain control for the Clean Channel’s Solid State preamp section. Use this control along with the Clean Channel’s volume control (#20) to create a wide variety of sounds at any volume level. (Some suggested settings can be found on pages 12 and 13.) With
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tm GT-80D QuadraDrive THE GT-80D FRONT PANEL - CON’T: * * * Please refer to the illustration on page 4. * * * 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). Turning 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 range of 30dB at 10kHz, which allows you to adjust the crispness or
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tm GT-80D QuadraDrive THE GT-80D REAR PANEL: 100/120VAC - 2 1/2A NORMAL BLOW 220-240VAC - 1 1/2A NORMAL BLOW CHANNEL/ LINE LINE REVERB TUBE IN OUT CAUTION CAUTION: CHASSIS SURFACE HOT. RISK OF ELECTRIC EXTERNAL FOOT EFFECTS CAUTION: TO RE- ATTENTION: SHOCK – DO NOT OPEN ATTENTION: SUPERFACIE DE CHASSIS EST CHAUDE. DUCE THE RISK OF FIRE, UTILISER UN FUSIBLE DE SPEAKER SWITCH LOOP RISQUE DE CHOC ELECTRIQUE AVIS:NE PAS OUVRIR REPLACE FUSE WITH RECHARGE DE MEME SAME TYPE AND RAT- TYPE. TO REDUCE TH
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tm GT-80D QuadraDrive ABOUT THE DIGITAL SOUND PROCESSOR: Using the Mode Control 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 effects is located. Use this diagram along with the table on the facing page to familiarize yourself with the locations of the many different s
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tm GT-80D QuadraDrive ABOUT THE DIGITAL SOUND PROCESSOR: Table of Settings: The table below lists each of the 32 settings of the GT-80D’s Mode control, along with a brief explanation of each effect. NO. NAME TYPE DESCRIPTION 0 OFF NONE Bypass—no signal processing occurs. 1 SMALL ROOM, BRIGHT SMALL REVERB 8’ x 8’ empty room with hardwood floors. 2 SMALL ROOM, DARK SMALL REVERB 8’ x 8’ carpeted room with up to four people. 3 SMALL HALL, BRIGHT SMALL REVERB 20’ x 40’ Rehearsal Hall, wood floors, ha
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tm GT-80D QuadraDrive ABOUT THE DIGITAL SOUND PROCESSOR: (Semi-) Technical Description: “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 the strings with his strumming hand. Sound waves instantaneously travel from the guitar’s sound hole through the air to you ears, where your brain processes the
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tm GT-80D QuadraDrive ABOUT THE DIGITAL SOUND PROCESSOR: Block Diagrams: TYPICAL REVERB RESPONSE Sound REVERSE REVERB EFFECT TO AN IMPULSE Amplitude Time EARLY REVERB Time domain response of a reverse reverb, RELECTIONS "TAIL" impulse input. Reverb effect is digitally PRE- reversed to produce the opposite sound pattern of natural (or digital) reverb. DELAY REVERB (DECAY) TIME Time domain response of a typical reverb, impulse input. Early reflections and reverb "tail" combined with room char
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tm GT-80D QuadraDrive SOME SUGGESTED SETTINGS: SPARKLING CLEAN: OUT OUT FUNKY CLEAN: OUT OUT WARM TUBE: OUT IN BLUESY DIRT: OUT IN 12
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tm GT-80D QuadraDrive WARM TUBE CRUNCH: IN IN HOT TUBE LEAD: IN IN SOLID STATE LEAD: IN OUT SOLID STATE CRUNCH: IN OUT 13
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tm tm GT GT-80D -80D QuadraDrive QuadraDrive SYSTEM BLOCK DIAGRAM: CHANNEL TUBE CLEAN GAIN LED LED LED CLEAN TONES TUBE & MASTER TUBE LOW MID HIGH MASTER 0VERDRIVE GAIN LED INPUT DSP LEVEL S.S. CLEAN GAIN MODE LED LED SOLID OVERDRIVE STATE TONES & MASTER LED S.S. OVERDRIVE GAIN LOW MID HIGH MASTER POWER AMP TUBE LINE OUT LINE IN DRIVER 12" CRATE CUSTOM MOSFETS SPEAKER EXTERNAL SPEAKER 14
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tm GT-80D QuadraDrive
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tm GT-80D QuadraDrive TECHNICAL SPECIFICATIONS: Output Power Rating 80 watts RMS @ 5% THD 8 ohm load, 120 VAC Gain 88dB, tones @ “5” @ 1kHz Tone 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 To Noise Ratio Overdrive Channel Solid State 61dB Tube 57dB Clean Channel Solid State 81dB Tube 72dB Input Impedance 1M ohm Maximum Signal Accepted 3V peak to pe
