PreSonus BlueTube DP - Manual (Page 7)

7
2 . 1 F R O N T P A N E L B A S I C L A Y O U T
The front panel of the BLUETUBE DP has analog VU meters for channel
1 and 2 to the far left and far right respectively, which measure the input
level. VU stands for ‘volume unit’, which is an average measurement of
the input signal level. This means that not all transients will be displayed
by the VU meter.
Both preamp channels contain:
?
+48V Switch
?
Polarity Reversal Switch
?
-20dB Pad
?
80Hz Filter
?
Gain Control (0 to 54dB)
?
Tube Drive Control (0 to100%)
2 . 2 P R E A M P L I F I E R S E C T I O N