User manual AMPEG SVP PRO

[. . . ] User's Guide for the User's Guide for the Bass Preamp Ampeg ® is Proudly Made in America Ampeg ® is Proudly Made in America SVP-PRO Bass Preamp TABLE OF CONTENTS Introduction . . 3 Important Safeguards and Precautions . . 5 Important Information About Tubes and Tube Products . . back cover CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE. [. . . ] If your bass has active pickups, depress this switch to better accommodate its output signal. GAIN: Use this control to adjust the level of the input signal. When properly set, the Peak LED (#5) will flash on strong signals. For the best signal to noise ratio set the Gain control to the highest useable setting and adjust the Drive and Master controls (#8, 18) to obtain the desired output level. PEAK/MUTE LED: This LED illuminates when the preamp signal approaches clipping. When the Mute switch (#2) is engaged, this LED stays on as a visual indicator that the Mute function is active. BRIGHT: This switch, when depressed, boosts the upper mid and high frequencies. ULTRA LO: This switch, when depressed, provides emphasis to the low end by boosting the low frequencies and cutting the mid frequencies. 8. DRIVE: Use this control to adjust the level of the distortion. In the fully counterclockwise position the preamp is in the cleanest, traditional SVT condition. As the control is rotated clockwise, the distortion level is increased. The tone of the signal is also changed to provide a smoother overdrive. The tone controls may have to be readjusted to obtain the desired tone. The Gain control (#4) and Pad (#3) interact with the Drive control. For greater overdrive, the Pad switch (#3) should be out and the Drive control should be rotated fully clockwise. Use the Gain control (#4) to set the amount of overdrive desired. The Peak LED (#5) will remain illuminated when the amplifier is used in this manner. BASS: Use this control to adjust the low frequency output level. This control provides 12dB of cut or boost at 40Hz. MIDRANGE: Use this control to adjust the mid frequency output level. This control provides 15dB of cut or 12dB of boost at the frequency selected by the Frequency control (#11). FREQUENCY: Use this control to select the center frequency for the Midrange control (#10). [. . . ] 29. TRANSFORMER BALANCED OUT: Use this XLR jack to connect the preamp to an external power amplifier, mixing console or house PA system. Some use special circuitry which enables them to simulate the distortion characteristics 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. PREAMPLIFIER TUBE TYPES AND USAGE: The tubes used in preamplifiers (12AX7, 12AU7, 12AT7, etc. ) amplify the signal from your instrument and shape the sound. [. . . ]