V18-112 V18-212 Tube Guitar Amplifier with Reverb Owner’s Manual
V18-112/V18-212 Tube Guitar Amplifier with Reverb TABLE OF CONTENTS Introduction ..........................................................................3 The Front Panel ....................................................................4 The Rear Panel .....................................................................5 Important Information About Tubes and Tube Products ............6 A Brief History of Tubes ..................................................6 Tube Types and Usage ..................
V18-112/V18-212 Tube Guitar Amplifier with Reverb Introduction Congratulations! You are now the proud owner of a Crate V18-112 or V18-212 tube guitar amplifier.
V18-112/V18-212 Tube Guitar Amplifier with Reverb The Front Panel GAIN 4 5 LEVEL 4 6 3 8 9 1 INPUT 1 0 10 2 TREBLE 4 6 3 7 2 5 8 9 1 0 10 3 MIDDLE 2 8 10 8 9 1 0 4 10 INPUT: Use this jack to connect your guitar to the amplifier using a shielded instrument cable. 2. GAIN: Use this to adjust the gain for the channel’s Overdrive. With the control turned counter-clockwise, the gain is low and very little distortion is present.
V18-112/V18-212 Tube Guitar Amplifier with Reverb The Rear Panel D E S I G N E D I N S T. L O U I S M O , U S A .
V18-112/V18-212 Tube Guitar Amplifier with Reverb Important Information about Tubes and Tube Products: A Brief History Of The Tube: In 1883, Edison discovered that electrons would flow from a suspended filament when enclosed in an evacuated lamp. Years later, in 1905, Fleming expanded on Edison’s discovery and created the “Fleming Valve.” Then, in 1907, Dr. Lee de Forest added a third component – the grid – to the “Fleming Valve” and the vacuum tube was a fact of life.
V18-112/V18-212 Tube Guitar Amplifier with Reverb Important Information About Tubes and Tube Products (continued): The power tubes are the largest tubes used in an amplifier. These tubes convert the low-level, conditioned signal from the preamplifier into a level that is sufficient to drive the speakers. There are several types of power tubes available, each of which offers a different performance/sound characteristic. For example, the EL34 power tube produces a great classic rock sound.
V18-112/V18-212 Tube Guitar Amplifier with Reverb Important Information About Tubes and Tube Products (continued): Whenever you replace the power tube(s): • Always have the amplifier’s bias voltage checked by a qualified service center. Improper bias voltage will cause degradation in performance and possibly damage the tubes and/or the amplifier. (See “The Importance of Proper Biasing”, below for more information). • We highly recommend that you replace the driver tube(s) as well.
V18-112/V18-212 Tube Guitar Amplifier with Reverb Important Information About Tubes and Tube Products (continued): Survival Tips For Tube Amplifiers: To prolong tube life, observe these tips and recommendations: • Match the impedance of your speaker cabinet(s) to your 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.
V18-112/V18-212 Tube Guitar Amplifier with Reverb System Block Diagram GUITAR INPUT 12AX7A V1B 12AX7A V1A 12AX7A V2A 12AX7A V2B OVERDRIVE GAIN TREBLE MID BASS PHASE SPLITTER LINE OUT EL84 12AX7A V3A OVERDRIVE LEVEL 8 OHM INTERNAL SPEAKER 12AX7A V3B REVERB IN EL84 REVERB OUT REVERB LEVEL 10
V18-112/V18-212 Tube Guitar Amplifier with Reverb Service Information If you are having a problem with your V18-112 or V18-212, you can go to our website (www.crateamps.com) and click on Support for service information, or call 1-800-898-3211 during business hours (7 am to 5 pm PST, Monday-Friday). If you are outside of the U.S., contact your local distributor for technical support and service. The V18-112/V18-212 is covered with a durable fabric-backed vinyl material. Wipe it clean with a lint-free cloth.
V18-112/V18-212 Tube Guitar Amplifier with Reverb V18-112/V18-212 TECHNICAL SPECIFICATIONS Output Power Rating 18 W rms @ 5% THD, 8 ohm load, 120 VAC Signal-to-Noise Ratio 42 dB, Typical Gain 98 dB, all controls @ 10 EQ Treble: 12 dB range @ 6 kHz Middle: 10 dB range @ 1 kHz Bass: 8 dB range @ 150 Hz Speaker Specs V18-112: V18-212: 1 x 12", 50 W, 8 ohm, 1.75" voice coil diameter, 30 oz magnet 2 x 12", 50 W, 16 ohm in parallel, 1.
