User manual PRESONUS TUBEPRE

[. . . ] TubePRE Single-Channel Tube Mic-Preamplifier w/ VU Meter User's Manual VERSION 1. 0 Presonus Limited Warranty Presonus Audio Electronics Inc. warrants this product to be free of defects in material and workmanship for a period of one year from the date of original retail purchase. This warranty is enforceable only by the original retail purchaser. To be protected by this warranty, the purchaser must complete and return the enclosed warranty card within 14 days of purchase. [. . . ] This may occur due to a high output level from a microphone or line device. Padding the input provides increased "headroom" for the operator. Drive The TubePRE drive control increases the amount of signal routed through the 12AX7 vacuum tube. (The gain controls overall volume, whereas the drive controls volume routed through the tube. ) The effect achieved by this procedure can be subtle to extreme, depending on the setting being used. A "warming up" of the sound can be noticed at lower settings. This desirable effect is especially good for microphones and on an electric bass and the resulting sound is 5 infinitely richer and sweeter. An overdriven signal can be achieved by significantly raising the level of the drive control. This overdriven tube effect is extremely useful in providing distorted guitar and for creating that authentic "blues harp" vibe (harmonica). The possibilities of the drive control are limited only to your application and your imagination. Gain This control governs the amount of boost to the signal being processed by the preamplifier. Dynamic mics and instruments without preamps normally require more gain than condenser mics and instruments that have a built-in preamp (care should be taken with instruments having their own built-in preamp not to overdrive the input of the TubePRE). Increasing the gain should provide the signal that is needed from the preamp for a hotter (louder) recording level. 2. 4 Back Panel XLR wiring for input and output PIN 1 PIN 2 PIN 3 GND High Low (+) (-) The output XLR is balanced 6 1/4" phone plug wiring input and output TIP High (+) SLEEVE GND (-) The output 1/4" phone plug is unbalanced 7 3. 1 OPERATION 3. 2 Dynamic Microphones Lower output levels characterize dynamic microphones, so more gain is needed to achieve sufficient operating levels. Occasionally it is necessary to add the -20dB pad to the microphone to avoid distortion (e. g. Do not use phantom power when using dynamic microphones. Replace the chassis, side, hex nuts and screws. 3. 6 Application Guide Direct Box The 1/4" and XLR outputs can always be used simultaneously. The instrument should be plugged into the 1/4" instrument input. The 1/4" output can be connected to an amplifier on stage and the XLR output could be connected to the PA system or monitoring mixer. 9 With a compressor/EQ/dynamics processor When running the Tube Pre in conjunction with other processors it is recommended that the TubePRE be the first unit in the chain. The other units should be connected to the output (either XLR or 1/4") of the TubePRE. Most compressors require that the signal be preamplified before they are connected. This simply means that the signal is loud enough for the compressor to process it. [. . . ] 10Hz to 50kHz Number of Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . One Performance THD + Noise (Unweighted) . . . . . . . . . . . . . . . . . . . . . . . . . 0. 05% @ 0dB Tube Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10% @ 20dB Tube Drive Noise Floor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]