USER’S GUIDE
VFX5112/5212 Guitar Amplifier Table of Contents: The Front Panel...................................................................................4 The Rear Panel ....................................................................................5 Using the Footswitch to Save DSP Settings ....................................5 Important Information About Tubes and Tube Products A Brief History Of The Tube ..........................................................6 Tube Types and Usage.....................
VFX5112/5212 Guitar Amplifier Congratulations! You are now the proud owner of a V-Series VFX Guitar Amplifier. These combo amplifiers combine incredible vintage tube sound with 15 outstanding digital effects – giving you a powerful tube amplifier that’s easy to operate yet still produces incredible sounds! Like all St. Louis Music amplifiers, your VFX is designed by musicians, and built using the finest components available. Extensive testing confirms that this amplifier is the absolute best it can be.
VFX5112/5212 Guitar Amplifier The Front Panel: INPUT VOLUME TREBLE MID BASS GAIN TREBLE MID BASS Level Mode T-WAH SLAP CHORUS CHO•REV• DELAY BYPASS CHO• REV 10 0 10 0 10 0 10 Channel 0 Select Channel A 1 2 3 4 5 1. Input: Connect your instrument here by means of a shielded signal cable. 2.. Volume: Use this control to adjust the output level of Channel A. 3. Treble: Use this control to adjust the output level of the high frequencies for Channel A.
VFX5112/5212 Guitar Amplifier The Rear Panel: ST. LOUIS MUSIC, INC. 18 18. AC Line Cord (not shown): 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. 19.
VFX5112/5212 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.
VFX5112/5212 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.
VFX5112/5212 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.
VFX5112/5212 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.
VFX5112/5212 Guitar Amplifier Suggested Settings: Clean: VOLUME Low Volume Buzz: TREBLE MID BASS GAIN TREBLE MID BASS Level Mode T-WAH SLAP CHORUS CHO•REV• DELAY BYPASS CHO• REV 10 0 10 0 10 0 10 Channel 0 Select Channel A Bluesy Crunch: VOLUME TREBLE 10 0 10 0 10 0 10 0 10 Channel B DELAY 1 VIBRATO DELAY• FAST REV 1 DELAY VIBRATO 2 SLOW DELAY• REV 2 MID BASS GAIN TREBLE MID BASS Level Mode BYPASS CHO• REV 0 10 0 10 0 10 Channel 0 Select Channel A Sparkly
VFX5112/5212 Guitar Amplifier System Block Diagram: INPUT V1A V1B CHANNEL A CHANNEL SELECT BASS MID TREBLE VOL V2A V2B V3A V3B CHANNEL B GAIN BASS MID TREBLE LEVEL EL34 V5 LINE LINE OUT IN V4A IMPEDANCE SELECT SPEAKER DSP V4B EL34 V6 EXT.
VFX5112/5212 Guitar Amplifier VFX 5112/5212 TECHNICAL SPECIFICATIONS: OUTPUT POWER RATING SIGNAL TO NOISE RATIO GAIN Channel A: Channel B: EQ - CH. A Treble: Mid: Low: EQ - CH. B Treble: Mid: Low: PRESENCE SPEAKER SPECS VFX 5112: VFX 5212: PREAMP TUBES POWER TUBES POWER REQUIREMENTS 50Watts RMS @ 5 % THD 16 ohm load 120 VAC 70dB Typical 62 dB 98 dB 30dB range @ 10kHz 6dB range @ 600Hz 30dB range @ 80Hz 10dB range @ 4kHz 10dB range @ 1kHz 12dB range @ 100Hz 18dB range @ 20kHz 1 X 12”, 60w, 16 ohm, 1.
