® GVT15-112 Guitar Amplifier full on standby TDSK half input gain treble middle bass volume reverb off power MODEL GVT15-112 OWNER’S MANUAL
TABLE OF CONTENTS Important Safety Instructions..................................................2 Introduction / Special Features...............................................4 The Front Panel.....................................................................5 The Rear Panel......................................................................6 Important Information about Tubes..........................................7 Block Diagram.....................................................................
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
Introduction Ampeg has a history of delivering pure all-tube tone for over 60 years. During that time we’ve made great friends and damaged some ear drums. We’ve seen it all, lived it all and lived to talk about it. The backbone of American Rock is back. Become a part of the American tone invasion with the all-new Ampeg GVT Series that delivers all-tube tone force that will set you apart from the rest.
The Front Panel full on standby half input gain treble middle bass volume reverb 1 2 3 4 5 6 7 1. INPUT: Connect a guitar to this 1/4" input using a high-quality shielded instrument cable. 2. GAIN: This control adjusts the gain of the amplifier. 3. TREBLE: Use this to adjust the high frequency level of the amplifier. This provides up to 12 dB of boost or 12 dB of cut at 5 kHz. The high frequency output is flat at the center position. 4. 5. 8. 6.
The Rear Panel MODEL GVT15-112 POWER CONSUMPTION 90W AVIS: RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR EFFECTS LOOP RETURN SEND REVERB/EFFECTS FOOT SWITCH POWER OUTPUT 15WATTS RMS - CLASS 2 WIRING 4 OHMS 4 OHMS 8 OHMS 8 OHMS 16 OHMS WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES FOR THE U.S.
17. 16 OHMS: The 16 Ω speaker output jack is designated for 16 Ω speaker cabinets only. WARNING! Never turn on or use the amplifier without a load or speaker connected to the amplifier. ALWAYS use a good quality (non-shielded) speaker cable. Never use (shielded) instrument cable. ALWAYS match the amplifier’s speaker output impedance to the impedance of the speaker that is being used. Use only one type impedance output at a time.
Important Information About Tubes (continued): Changing the Tubes: To get to the power tubes, the rear screen must be removed and the tube retainer(s) must be moved out of the way. Qualified service persons may follow these steps to change the tubes: • Turn the amp off, unplug it and let it cool for at least 5 minutes. • Remove the screws which hold the perforated metal screen to the rear of the cabinet. • Set the perforated metal screen aside.
Important Information About Tubes (continued): Survival Tips for Tube Amplifiers: To prolong tube life, observe the following tips and recommendations: • Match the impedance of the speaker cabinet(s) to the amplifier. Improper impedance matching will contribute to early tube degradation and may cause premature tube failure. • Make sure the speaker(s) are properly connected prior to turning on the amplifier. • Allow sufficient time for the amplifier to properly cool down prior to moving it.
Block Diagram TONE CONTROL CIRCUITRY INPUT 1/2 12AX7A GAIN MIDRANGE TONE CONTROL CIRCUITRY 1/2 12AX7A BASS TREBLE VOLUME EFFECTS LOOP / REVERB FOOTSWITCH ONTROL UITRY EBLE EFFECTS LOOP SEND RETURN REVERB SEND RETURN VOLUME TRUE BYPASS TRUE BYPASS REVERB EFFECTS LOOP / REVERB FOOTSWITCH POWER 16 Ω 8Ω 1/2 12AX7A 6V6GT 1/2 12AX7A 6V6GT FULL / STANDBY / HALF SWITCH 8Ω 4Ω B+ 4Ω SPEAKER OUTPUTS REVERB 16 Ω 12" 16 Ω 8Ω CELESTION SPEAKER 8Ω 4Ω 4Ω GVT15-112 SPEAKER 10 OUTPUTS ™ G
TECHNICAL SPECIFICATIONS Preamp Tube Power Amp Tube Premium 2 x 12AX7 / ECC83 / 7025 Premium 2 x 6V6GT Output Power Rating 15 watts rms (“full” tetrode mode) / 7.
® 211-51TVG reifilpmA ratiuG MODEL GVT15-112 POWER CONSUMPTION 90W AVIS: RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR EFFECTS LOOP RETURN SEND REVERB/EFFECTS FOOT SWITCH POWER OUTPUT 15WATTS RMS - CLASS 2 WIRING 4 OHMS 4 OHMS 8 OHMS 8 OHMS 16 OHMS WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
