Presonus TubePre V2

A fully professional tube preamp, with a dual-servo (no capacitors) gain stage that lets you boost the program signal 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. 

The TubePre V2 employs 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.

Housed in a rugged case, the TubePre V2 rear panel sports separate unbalanced, ¼” instrument and balanced, XLR mic inputs and unbalanced ¼” and balanced XLR line outputs. Including a high-pass filter, phantom power for condenser mics, polarity reverse switch, and a backlit VU meter. 

The TubePre V2 also has separate instrument and mic inputs, to serve as a dynamite direct box (DI) for guitars and basses.

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 
• Input/Output :
  • 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

Specifications :

• Mic Input :
  • Connector Type : XLR, female, balanced 
  • EIN : -131 dB, 20 kHz BW, max gain, Rs=40 ohm, A-wtd -128 dB, 20 kHz BW, max gain, Rs=40 ohm, 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 ohm 
  • Phantom Power : +48 VDC, 10 mA 
• Instrument Input :
  • Connector Type : ¼” TS, female, unbalanced 
  • Input Impedance : 1 M ohm 
• Analog Output : 
  • Connector Types : XLR, male, balanced ¼” TS, female, unbalanced 
  • Maximum Output : +20 dBu 
  • Output Impedance : 51 ohm 
• Tube : 12AX7
• External Power Adapter : +12 VDC, 1A, center-pin positive
• Dimensions :
  • 1/3U rack-mountable (screw-mount to standard rack tray, not included) 
  • Height : 44.45 mm x Depth : 139.7 mm x Width : 139.7 mm
• Weight : 2.27 kg