[. . . ] Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. In no event will Presonus be liable for incidental, consequential or other damages resulting from the broach of any express or implied warranty, including, among other things, damage to property, damage based on inconvenience or on loss of use of the product, and, to the extent permitted by law, damages for personal injury. Some states do not allow the exclusion of limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights, which vary form state to state. [. . . ] -20dB Pad Provides -20 decibels of attenuation with the push of a button. This is a very useful feature for rapidly reducing the level coming into the TUBEPRE and thus preventing the input signal from distorting the input. 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. 3. 6 Application Guide Direct Box The 1/4" and XLR outputs can always be used simultaneously. 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. In most cases (and there are exceptions) if you were to plug a microphone/guitar directly into a compressor the signal will be too low (essentially too quiet) for the device to process it. [. . . ] -20dBu to +3dBu Clip LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +20dBu Power Supply Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Linear/External Transformer Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 VAC/1000mA Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 WATTS Physical Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]