SMPro Tube Box, Руководство по эксплуатации

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3.2 Audio Connections
The Tube Box features a 1/4” (6.5mm) TRS connector on the front panel for connec-
tion of a Balanced Microphone.
All other connections are done thru the back panel multipin connector.
* Note: The Tube Box accepts mic or line level input signals. Do not connect your
power amplifier outputs to the Tube Box inputs!
3.3 Preamp control
The Tube Box features a Tube Amplifier, the control for the pre-
amp are the INPUT GAIN, the PAD(-20dB) and the Phantom
power switch.
A Peak LED is also provided to indicate when the input level ex-
ceeds the preamps operational level and send the unit into square
wave (distortion) which sometimes may be a desirable effect.
3.4 optical compressor
3.4.1 Compression on/off switch & LED Indicator (nearthe
PEAK light)
Turns the compressor stage on or off. The indicator shows the on/
off status of the compressor as well as the compression amount,
it is a tri state LED.
3.4.2 Rotary compression control
The rotary compression control sets the compression ratio of the
compressor. The compression ratio expresses the difference between the input level
change and the output level change. A compression ratio of 6:1, for example, indi-
cates that for every 6dB of level change on the input signal there is only 1dB of level
change on the compressed signal. The higher the compression ratio, the smaller the
dynamic range.
3.4.3 Rotary attack encoder
The rotary attack control allows for adjustment in milliseconds the time it takes the
compressor module to respond to the corresponding input signal before gain re-
duction occurs. Short attack times quickly bring down the level of the loud, fast
transients in the audio signal; long attack times let more sound through before the
compressor engages, resulting in a punchier sound.
3.4.4 Rotary release encoder
The release control sets the time in seconds it takes for the compressor module gain
to return to the point of no gain reduction in the absence of audio program material.
Short release times create a more exaggerated effect („breathing“), whereas long
release times have a more gradual decay.
3.5 Output level
The output level basically does as it says, controls the output level of the TUBE BOX.
3.5.1 Phase reversal switch
A phase reverse switch is available for reversing the phase of the signal by 180 de-
grees. This can be desired in situations such as recording a snare drum from above