At PreSonus, we’ve been designing preamps for a long time, and we always focus on audio quality first. So when we decided to upgrade our popular TubePre V2, we focused on improving an already high-quality soundwithout jacking up the price. Like the original TubePre, the new version is a fully professional tube preamp, with a dual-servo (no capacitors) gain stage that lets you boost the program signal to smoking hot levels without significantly increasing the background noise. Discrete components and high-voltage operation offer dynamic range and detail not found in other single-channel tube preamps in its class.

But the TubePre V2 provides an even wider palette of sound options, and a much more focused tube saturation, than the original TubePre. It has been upgraded to employ PreSonus’ popular XMAX Class A solid-state preamp, which is followed in the signal path by a 12AX7 vacuum-tube stage. Twist the TubePre V2 Drive saturation control to add the “color†that only a hand-selected 12AX7 vacuum tube can deliver from gentle warmth to total fuzz.

Key Features

• XMAX Class A preamp input stage
• 12AX7 dual-servo vacuum tube output stage
• Input Gain control
• 48V phantom power
• 80 Hz high-pass filter
• -20 dB pad
• Instrument input select
• Polarity-reverse switch
• Backlit VU meter
• Clip LED
• 1 unbalanced ¼†instrument input
• 1 balanced XLR mic input
• 1 unbalanced ¼†line output
• 1 balanced XLR line output
• Compact 1/3U rack-mount chassis
• External 12 VDC, 1A power supply

Technical Specs

Mic Input
Connector Type
XLR, female, balanced
EIN  
-131 dB, 20 kHz BW, max gain, Rs=40, A-wtd -128 dB, 20 kHz BW, max gain, Rs=40, unwtd
Frequency Response
20 Hz - 20 kHz, -0.3 dB, +4 dBu, unity gain 5 Hz - 120 kHz, -3 dB, +4 dBu, unity gain
THD+N     
0.01%, -10 dBu, 1 kHz, unity gain, 20 kHz BW, unwtd
Dynamic Range
115 dB, 1 kHz, unity gain, 20 kHz BW, A-wtd 107 dB, 1kHz, unity gain, 20 kHz BW, unwtd
Input Impedance      
1.3 k
Phantom Power         
+48 VDC, 10 mA
Instrument Input
Connector Type
¼†TS, female, unbalanced
Input Impedance      
1 M?
Analog Output
Connector Types       
XLR, male, balanced ¼†TS, female, unbalanced
Maximum Output      
+20 dBu
Output Impedance    
51
Tube Stage
Type
12AX7
Power
External Power Adapter    
+12 VDC, 1A, center-pin positive
PSU Barrel Dimensions     
5.5 mm O.D., 2.1 mm I.D., 9.5 mm length
Physical
Dimensions       
1/3U rack-mountable (screw-mount to standard rack tray, not included)
Height      
1.75†(44.45 mm)
Depth        
5.5†(139.7 mm)
Width        
5.5†(139.7 mm)
Weight     
5 lb. (2.27 kg)