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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 con-

tribute to early tube degradation and may cause premature tube failure.

• Make sure the speaker(s) are properly connected prior to turning on the amplifier.

• After playing the amplifier, allow sufficient time for it to properly cool down prior to moving it. A properly

cooled amplifier prolongs tube life due to the internal components being less susceptible to the damage
caused by vibration.

• Allow the amplifier to warm up to room temperature before turning it on. The heat generated by the tube

elements can crack a cold glass housing.

• Replace the output tube(s) before the performance degrades or the tubes fail completely. Replace the

tube(s) on a regular basis (at least once per year or as often as every 4 to 6 months if you play long and
hard every day).

• Always have the bias checked after replacing the output tubes (unless the amplifier is equipped with "self-

biasing circuitry"). This should be done ONLY at a qualified service center. Improper biasing could result
in the tubes running too hot, which greatly reduces the life of the tubes – or too cold, which results in dis-
torted sound regardless of level settings. Do not play the amplifier if it exhibits these symptoms – get the
bias checked/adjusted immediately to prevent tube failure and/or other damage.

• If the locating notch on the base of a power tube breaks off, replace the tube. This significantly reduces

the risk of damaging your amplifier by incorrectly inserting the tube.

• Protect the amplifier from dust and moisture. If liquid gets into the amplifier proper, or if the amplifier is

dropped or otherwise mechanically abused, have it checked out at an authorized service center before
using it.

• Proper maintenance and cleaning in combination with routine checkups by your authorized service center

will insure the best performance and longest life from your amplifier.

CAUTION: Tube replacement should be performed only by qualified service personnel who are
familiar with the dangers of hazardous voltages that are typically present in tube circuitry.

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Summary of Contents for VFX5112

Page 1: ...U S E R S G U I D E ...

Page 2: ...RAIN OR MOISTURE SERVICE MUST BE PERFORMED BY QUALIFIED PERSONNEL OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS CONTINUED EXPOSURE TO HIGH SOUND PRESSURE LEVELS CAN CAUSE PERMANENT HEARING IMPAIRMENT OR LOSS USER CAUTION IS ADVISED AND EAR PRO TECTION IS RECOMMENDED IF UNIT IS OPERATED AT HIGH VOLUME CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING TO REDUCE THE RISK OF FIRE...

Page 3: ... read the information contained in this manual before you begin playing And Thank You for choosing a V Series amplifier Declaration Of Conformity 35 Effective 01 01 2001 Manufacturer s Name SLM Electronics Production Facility 11880 Borman Drive St Louis MO 63146 USA Production Facility 700 Hwy 202 W Yellville AR 72687 USA Shipping Facility 1400 Ferguson Ave St Louis MO 63133 USA Office Facility 14...

Page 4: ...put level of the middle fre quencies for Channel B This con trol provides an adjustment range of 10dB at 1kHz 10 Bass Use this control to adjust the output level of the low frequen cies for Channel B This control provides an adjustment range of 12dB at 100Hz 11 Level Usethiscontroltoadjust the output level of Channel B 12 DSP Mode Use this control to select which of the following digital effects t...

Page 5: ...dance of the speaker s The impedanceofthespeaker s inside the amplifier is 16 ohms The switch is set at the factory to the 16 ohm position When a 16 ohm extension speaker cabinet is used see 22 thisswitchmustbesetto the 8 ohm position Use the tip of a small flatblade screwdriver to slide the switch to the proper position 8 OHM POSITION Impedance switch as seen from below 16 OHM POSITION 19 20 21 2...

Page 6: ...ed a number of outstanding solid state amplifiers that sound very very good Some use special circuitry which enables them to simulate the distortion characteris tics of a tube amplifier However the tube amplifier still held in the highest esteem by many musicians offers a classic vintage sound in a contemporary market Tube Types And Usage Tube amplifiers are based primarily on two types of tubes p...

Page 7: ...gain starts to hum lacks sensitivity or feels as if it is working against you the preamplifier tubes may need to be replaced The power tubes are subjected to considerably more stress than the preamplifier tubes Consequently they almost always fail degrade first If deteriorating power tubes aren t replaced they will ultimately fail Depending on the failure mode they may even cause severe damage to ...

Page 8: ...proper biasing If the bias is set too high overbiased the sound from the amp will be distorted at all levels If the bias is set too low under biased the power tubes will run hot the plates inside the tubes may glow red due to excessive heat and the sound from the amplifier will lack power and punch The excessive heat greatly reduces tube life from a few days to as little as a few hours in extreme ...

Page 9: ...eplacing the output tubes unless the amplifier is equipped with self biasing circuitry This should be done ONLY at a qualified service center Improper biasing could result in the tubes running too hot which greatly reduces the life of the tubes or too cold which results in dis torted sound regardless of level settings Do not play the amplifier if it exhibits these symptoms get the bias checked adj...

Page 10: ...MID TREBLE GAIN BASS MID TREBLE VOLUME DSP 0 10 0 10 0 10 0 10 0 10 0 10 0 10 0 10 0 10 0 10 0 10 SLAP BACK CHORUS DELAY 1 DELAY 2 DELAY REV 1 DELAY REV 2 VIBRATO FAST VIBRATO SLOW BYPASS T WAH CHO REV SLAP CHORUS CHO REV DELAY SMALL REV MED REV LARGE REV Channel Select Channel A Channel B Master Presence Mode Level Level BASS MID TREBLE GAIN BASS MID TREBLE VOLUME DSP 0 10 0 10 0 10 0 10 0 10 0 1...

Page 11: ...r System Block Diagram INPUT GAIN CHANNEL A CHANNEL B V1A EL34 V5 EL34 V6 V4A V4B IMPEDANCE SELECT LINE OUT LINE IN CHANNEL SELECT V1B V2A VOL V2B V3A V3B TREBLE LEVEL BASS MODE LEVEL MID TREBLE BASS MID DSP EXT SPEAKER SPEAKER 11 ...

Page 12: ...212 2 X 12 60w 8 ohm 1 75 voice coil diameter 38oz magnet PREAMP TUBES 4 12AX7A POWER TUBES 2 EL34 POWER REQUIREMENTS 120 VAC 60 Hz 200VA 100 115 VAC 50 60 Hz 200VA 230 VAC 50 60 Hz 200VA SIZE AND WEIGHT VFX 5112 23 W x 19 H x 10 D 48 lbs VFX 5212 28 W x 21 H x 11 D 58 lbs The VFX 5112 5212 is covered with a durable Tolex material wipe it clean with a lint free cloth Never spray cleaning agents on...

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