Studio Projects VTB1RK Rack Kit for VTB1    Item #: STU VTB1RK 

VTB1 Features

• 48 Volt Phantom Power
• Phase Reverse
• Variable Input Gain Control On Detented Pot
• 1/4" D.I. Jack On Front Panel
• High Pass Filter
• Descrete Solid State Class A/B Design
• TRS Insert
• Mic/Line Switch
• VariableTube Blend On Detented Pot
• Meter Read Select Between Input and Output level
• Switchable Impedance between 50/200 Ohm
• 5 position LED metering
• XLR mic input
• Balanced outputs on XLR and 1/4"
• External AC Power Supply For extreme Low Noise Operation
• Output Gain Control On Detented Pot

Applications

• A superb vocal mic pre with warm transparent character
• Great for use as a Tube DI Box
• Great for production, broadcast, and voice over work
• Perfect for the professional and home project studio
• A quality vocal mic preamplifier suitable for all vocal styles

VTB1 Specifications

• Maximum Gain:
  • Mic In to Balanced Out: 72dB (60dB preamp gain, 12dB output gain)
  • Line In to Balanced Out: 42dB (30dB preamp gain, 12dB output gain)
  • Distortion/Noise (THD + Noise):
    -20dBu input-mic; 0dBu input-Line; Both measured at +15dBu output
  • Mic or Line In to Balanaced or Line Out: <0.0015% (Blend set full CCW- no tube)
  • Mic EIN: -128dBu (150 ohm source, 60dB gain)
• Frequency Response (20-20kHz, ref 1kHz):
  • -20dBu input, +15dBu output Mic In to Bal Out: +0 /-0.25 dB
  • 0dBu input, +15dBu output Line In to Bal Out: +0 /-0.5 dB
• Phase Response (20-20kHz, either input): <+/- 15 degrees
• Input Impedance:
  • Mic Input (Rear switch in 200 ohm position): 2000 ohms
  • Mic Input (Rear switch in 50 ohm position): 300 ohms
  • Line Input (Front panel TRS jack): 1.5 meg ohms
• Output Impedance:
  • Male-XLR Balanced Output: 100 ohms (50 ohms each leg)
  • TRS Line Out: 300 ohms (Impedance Balanced)
• Insert Jack (TRS):
  • Nominal Level: Approx 0dBu
  • Located between SS preamp stage and tube/output stage
  • Tip=Send: 50 ohms output impedance
  • Ring=Return: 7500 ohms input impedance