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STUDIO PROJECTS VTB1

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STUDIO PROJECTS VTB1 - Mic Preamp with Unique Vacuum Tube Blend Control

The Studio Projects VTB-1 is the ultimate in low cost mic preamplifier technology. Incorporating true class A/B switching, the VTB-1 is a totally discrete circuit. Unique to the VTB-1 is the "Tube Drive". The Tube Drive is a variable drive to a 12AX7, that allows the user to blend as little, or as much of the Tube Drive they want. This VTB-1 allows the user the most flexibility of any mic preamplifier in it's price class.

The VTB-1 allows you to go from a pristine solid state sound, to any combination of Tube Drive you choose...even hard distortion for guitars and bass! The VTB-1 is must have device as the perfect mic preamplifier for any microphone!

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

Specifications:


• Maximum Gain:


• Mic In to Bal Out: 72dB (60dB preamp gain, 12dB output gain)

• Line In to Bal 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 Bal 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:   <+/- 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

To see the latest information on this product, please visit http://www.studioprojectsusa.com.

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