USER’S GUIDE
V3112 Guitar Amplifier Table of Contents: The Front Panel...................................................................................4 The Rear Panel ....................................................................................5 Important Information About Tubes and Tube Products A Brief History Of The Tube ..........................................................6 Tube Types and Usage................................................................
V3112 Guitar Amplifier Congratulations! You are now the proud owner of a V-Series V3112 Guitar Amplifier. This combo amplifier packs a whole lot of vintage tube sound into its compact cabinet – giving you an amp that’s portable and easy to operate yet still produces incredible sounds! Like all St. Louis Music amplifiers, your V3112 is designed by musicians, and built using the finest components available. Extensive testing confirms that this amplifier is the absolute best it can be.
V3112 Guitar Amplifier The Front Panel: 1 2 3 4 5 6 7 1. Input: Connect your instrument here by means of a shielded signal cable. 2. Clean Volume: Use this control to adjust the output level of the Clean Channel. 3. Clean/Overdrive: This switch, when depressed, selects the Overdrive Channel. When this switch is in the out position, the Clean Channel is selected. 4. Overdrive Gain: Use this control to adjust the gain of the Overdrive Channel.
V3112 Guitar Amplifier The Rear Panel (not shown): 15. AC Line Cord: The grounded power cord should only be plugged into a grounded power outlet that meets all applicable electrical codes and is compatible with the voltage, power, and frequency requirements stated on the rear panel. Do not attempt to defeat the safety ground connection. 16.
V3112 Guitar Amplifier 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's Valve" and the vacuum tube was a fact of life. The door to electronic amplification was now open.
V3112 Guitar Amplifier Important Information About Tubes and Tube Products (continued): "looser" low-end response and produces more harmonics at mid and high frequencies ("creamier" sound). These differences become more noticeable at higher volumes. The EL84 and 6L6 tubes produce a big low-end thump and have a very good dynamic range. They offer a more traditional "American Rock" sound. The EL84 and 6V6 tubes produce a creamy sound with nice distortion.
V3112 Guitar Amplifier Important Information About Tubes and Tube Products (continued): You can check your preamplifier tubes for microphonics by turning the amplifier on, turning up the gain and tapping lightly on each tube with the end of a pencil or a chop stick (my favorite). You will be able to hear the tapping through your speakers, which is normal. It is not normal for a tube to ring like a bell after it’s tapped. If it does ring then it’s microphonic and should be replaced.
V3112 Guitar Amplifier 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.
V3112 Guitar Amplifier System Block Diagram: GUITAR INPUT 12AX7A V1A 12AX7A V1B CHANNEL SELECT 12AX7A V2A 12AX7A V2B OVERDRIVE GAIN TREBLE MID BASS BOOST PRESENCE CLEAN VOLUME PHASE SPLITTER CHANNEL SELECT EFFECTS EFFECTS SEND RETURN OVERDRIVE LEVEL 12AX7A V3B REVERB DRIVE REVERB RECOVERY REVERB LEVEL 10 12AX7A V3A EL84 V4 EL84 V5 EL84 V6 EL84 V7 8 OHM SPEAKER
V3112 Guitar Amplifier Declaration Of Conformity #35, Effective 01-01-2001 Manufacturer’s Name: Production Facility: Production Facility: Shipping Facility: Office Facility: SLM Electronics 11880 Borman Drive, St. Louis, MO 63146, USA 700 Hwy 202 W, Yellville, AR 72687, USA 1400 Ferguson Ave., St. Louis, MO 63133, USA 1400 Ferguson Ave., St.
V3112 Guitar Amplifier V3112 TECHNICAL SPECIFICATIONS: OUTPUT POWER RATING 30 Watts RMS @ 6 % THD, 8 ohm load, 120 VAC SIGNAL TO NOISE RATIO 71dB Typical GAIN Clean 56dB, Overdrive 101dB TREBLE 12dB range @ 6kHz BOOST +10db @ 900Hz MID 10dB range @ 1kHz BASS 8dB range @ 150Hz PRESENCE +8dB @ 10kHz SPEAKER SPECS 12”, 80w, 8 ohm, 1.75” voice coil diameter, 30 oz.
