The single-channel TubePre V2 tube preamp is an affordable way to add high quality tube warmth and character to your sound. This version provides a wide palette of sound options and focused tube saturation. This setup employs PreSonus popular XMAX Class A solid-state preamp which is followed in the signal path by a 12AX7 vacuum-tube stage with Tube Drive tube-saturation control. Clean and Accurate Sound from Preamps PreSonus? popular Class A XMAX preamps are widely lauded for their clarity and transparency. Housed in a rugged 1/3-rackspace case the TubePre V2 rear panel sports separate unbalanced 1/4″ instrument and balanced XLR mic inputs and unbalanced 1/4″ and balanced XLR line outputs. The front panel offers controls for gain 48V phantom power 80 Hz high-pass filter and polarity-reverse as well as a mic/instrument input switch. A lighted VU meter and a clip LED help you keep an eye on your levels. VU Meter Each channel has an illuminated VU meter so you can visually monitor your input levels. A Tube Drive control provides a wide range of sounds: when it is clicked off you are using the solid-state preamp for quiet transparent amplification; when it is engaged your signals flow through the tube preamp and you can achieve anything from gentle warmth to edgy distortion. Features 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 LEDSpecifications Inputs: Mic Input: Connector Type: XLR female balanced EIN (A-weighted): -131 dB 20kHz BW max gain Rs=40? EIN (unweighted): -128 dB 20kHz BW max gain Rs=40? Frequency Response (20 Hz – 20 kHz): -0.3 dB +4 dBu unity gain Frequency Response (5 Hz – 120 kHz): -3 dB +4 dBu unity gain THD+N: 0.01 -10 dBu 1kHz unity gain 20kHz BW unwtd Dynamic Range (A-weighted): 115 dB 1kHz unity gain 20kHz BW Dynamic Range (unweighted): 107 dB 1kHz unity gain 20kHz BW Input Impedance: 1.3 k? Phantom Power: +48 VDC 10mA Instrument Input: Connector Type: 1/4″ Jack unbalanced Impedance: 1 m? Output: Analog Output: Connector Types: XLR (balanced) 1/4″ Jack (unbalanced) Maximum Output: +20 dBu Output Impedance: 51? Tube Stage: Type: 12AX7 Power: Type: +12 VDC 1000 mA center pin positive PSU Barrel Dimensions: 5.5mm x 2.1mm x 9.5mm