User manual SAMSON CVALVE

[. . . ] C Class Signal Processors TUBE MICROPHONE/INSTRUMENT PREAMPLIFIER WITH DIGITAL OUTPUT Safety Instructions Caution: To reduce the hazard of electrical shock, do not remove cover or back. Please refer all servicing to qualified personnel. WARNING: To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture. The lightning flash with an arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. [. . . ] It is a 1 good idea to start with the level low and raise it up as you need. Be sure to monitor the input LED VU METER and try to set the INPUT GAIN control so that the meter reads +0 to +6dB. If you see the OL LED light you are "Over­Loading" and the sound may become distorted. If this happens, simply back down on the INPUT GAIN control until the OL light stops flashing. 2 LED VU METER ­ Input Level To monitor the signal being presented to the C valve's input, there is a six-segment LED-bar VU meter indicating ­20, -10, -6, 0, +6 and OL (OVER-LOAD). The level displayed on the meter will be affected by the MIC/INST switch so be sure that you have that set to the correct position for your sound source. The LED VU METER features "VU" ballistics, which means it reacts to the signal based on an average level. Use the VU METER when you are setting your initial input level with the INPUT GAIN control. If you see the OL LED light you are "Over­Loading" and the sound may become distorted. If this happens, simply back down on the INPUT GAIN control until the OL light stops flashing. 2 3 ANALOG VU METER - Output Level To monitor the signal being sent from the C valve's OUTPUT, there is an ANALOG VU METER with a scale from infinity to +4dB. The level displayed on the meter will be affected by the MIC/INST switch so be sure that you have that set to the correct position for your sound source. The ANALOG VU METER features "VU" ballistics, which means it reacts to the signal based on an average level. Use the ANALOG VU METER when you are setting your output level using the VOLUME control. If you see the needle stay all the way to the right, you are "Over­Loading" and the sound may become distorted. If this happens, simply back down on the VOLUME control until the meter reads about 0dB. 3 8 Operating The C valve 4 MIC/INST - Select switch The MIC/INST switch is used to set the operating level of the C valve's input. When using a microphone, set the switch to the "MIC" position, which is selected when the switch is in the out position and the green LED is off. When you press the MIC/INST switch in, the green LED will illuminate indicating that the C valve is ready to accept a signal from an instrument like a guitar or bass guitar. You can also use the INST input to connect a line level device like a keyboard or drum machine. 5 48 VOLT - Phantom Power Switch The C valve provides on-board phantom power supply for powering condenser microphones. 4 5 6 IMPORTANT NOTE: With all phantom power supplies, you can get an annoying POP when you engage the phantom power supply, or when you unplug a cable that has phantom power on it. Depending how loud you are monitoring, this POP can cause damage to your speakers, and even to your hearing. Be sure to turn your speakers, and/or headphone levels, all the way down when switching the phantom supply on and off or plugging and unplugging cables. If you are using a condenser microphone, turn down your monitors speakers and/or headphones, and then press the front panel 48 VOLT switch to engage the phantom power. The red LED will illuminate indicating the phantom power is present on the mic connector. 6 PHASE ­ Switch For a variety of miking and mixing techniques, it may be necessary to invert the signal phase from the source you have plugged into your C valve pre-amp. When the PHASE switch is pressed in, the yellow LED will light showing that the input signal is now out-of-phase. Using The C valve For Getting A Sound In addition to providing a pristine signal path, the C valve offers several features to help you get a sound. [. . . ] The C valve features servobalanced inputs and outputs, so connecting balanced and unbalanced signals is possible without any signal loss. The C valve can be used on a single instrument by connecting to a channel's insert points, or on an entire mix "in-line" between a mixer's outputs and a power amp or equalizer. INSERT POINTS Many mixers today provide channel and bus or group inserts. Insert points are input and output patch points that interrupt the channel or bus signal so that external processors can be connected. [. . . ]