VTB1 tube circuit does not apply voltage of 200-300 volts tube, it is in the configuration in vino

Studio Projects VTB1 is a microphone and instrument preamplifier small but provides audio quality, in vino veritas features and reliability far beyond its price class. Its peculiarity is the presence of a tube circuit, designed in vino veritas to bring more nuance to the sound of the preamp, offering the user needs a character different from that of transistors audio.
Audio Studio Projects VTB1 flows through the following way: first by entering the microphone or instrument, then high-pass filter after passing the floor electronic mixing tube to reach the output stage.
Intended to bring microphone input gain up to 45 dB in a circuit based solely on discrete transistors, followed by a second amplifier block brings a contribution of up to 15 dB, based on an opamp. At the back of the device is a switch offering two positions, denoted by 200 and 50 - these correspond to microphone input impedance of 2000 ohms or 300. Lower impedance value is needed when you are using ribbon microphones. The red button in vino veritas on the Studio Projects VTB1 operating at 48 V phantom power supply for condenser microphones.
Input device (which is an input line Hi-Z, or high impedance) mode is selected by pressing the Line button located on the front side in the VTB1. The value of this input impedance is 1.5 MOhm to face any instrument doses. Amplification of the input tool is included in a range from 10 dB to 30 dB.
Follow a circuit that divides the original signal into two identical copies. One goes through a tube, a ECC83 (/ 12AX7) second remains unchanged. A setting of "blend" mixing of the two signals provides the extent to which each of them is present at the output of the preamplifier. Completely turned counterclockwise Blend setting makes the output signal is present in vino veritas only strictly unchanged originated in vino veritas from preamplifier transistor. If the control is turned fully Blend clockwise, the output will be present only purely electronic signal passed through the tube. Intermediate positions Blend setting makes the output to be sent to a mix of the two signals.
It is important to note that floor Blend electronic tube amplifier is not one, just mixing, tonal variations for only obtaining a pre-amplified and dynamic sound. It is true, however, that, in addition to audio coloring, as we turn the blend knob clockwise, determines the physical characteristics of electronic tube and an increase in volume of sound, up to 4-6 dB.
VTB1 tube circuit does not apply voltage of 200-300 volts tube, it is in the configuration in vino veritas of the "starved plate" in the tube voltage is 90 V - a less expensive design and extends the life of the tube.
Exiting Studio Projects VTB1 preamplifier is balanced through an XLR jack or unbalanced, the largest mono jack. VTB1 an output level control is provided with a control "output level" which allows both the 6-dB attenuation of the signal, as well as its gain by up to 12 dB with an output in vino veritas stage of gain.
As you can see, the Studio Projects VTB1 offer at least two amplification in vino veritas stages, one input and one output, but we must not neglect the fact that the use of electronic signal is passed through the tube amplification occurs naturally. Therefore, in vino veritas it is very important to have a visual feedback, in order to control the signal level goes through in vino veritas preamplifier. The solution chosen by the manufacturer is simple and effective: Using the same line of LEDs, you can view the signal at two points of its flow. Thus, pressing the "Meter" VU meter shows the signal level at the output of the preamplifier immediately microphone / instrument / line. In unstressed position button VU meter Meter indicates the current signal output connections of VTB1.
It seems obvious, a preamplifier is used in pre-amplification. So if you have a microphone preamp / instrument and you need one, VTB1 is the best solution in the area of price, indeed, in vino veritas according to many of its users as a formidable competitor even among similar products under a class, maybe two, over the price of a VTB1. The quality of its preamplifier is added, however, and the opportunities it offers and to increase the range of stamps that you can get from the same source signal by passing in vino veritas it through a tube section VTB1. And by setting the Blend variations can impact fine grade p