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.
On Recording
When using the TubePRE as a front end for a recording device (such as the Presonus FIREstation), it is important to watch your output levels. For example, using the TubePRE for distortion (turning up the gain and tube drive REAL HIGH) could overload the inputs of the recording device. In this scenario it is necessary to limit the output level of the TubePRE. This can be accomplished by using a compressor/limiter (such as the Presonus BlueMAX).
3.6 FAQ/Troubleshooting
Can I switch the tube?
The TubePRE’s tube can be switched as long as it is a 12AX7. Proper caution must be taken when switching the tube. Please refer to Section
3.5of this manual for further directions on changing the tube or check our website at www.presonus.com.
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