Studio Project Mic 4 Sale W/ Pre-Amp

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Krazy Demon

Krazy Demon

Sicc OG
#1
Jul 25, 2002
1,503
14
0
#1
Studio Projects C1 Large Diaphragm Condenser Microphone

Product Description

The Studio Projects C1 is a large diaphragm, fixed-cardioid condenser microphone employing a 1.06 in. (27mm) capsule, high quality, low noise amplifier and balanced, transformerless output circuitry. It features switchable -10dB pad and 6dB@150Hz high pass filter for added control in various recording applications and a clear, full response expected from a large capsule microphone design.

Versatility is key in the recording arena, and the Studio Projects C1 is a well-proven and award winning tool. It is designed to deliver the finest quality vocal and instrumental recordings and will serve to enhance any professional or project studio at an unbelievably low price. As a result of uncompromising dedication and advanced production capabilities, Studio Projects will continue to broaden the range of quality pro audio microphones & electronics for today's recording environment.

Features:
Pressure-Gradient Transducer: 1.06 in. (27mm) 6um mylar diaphragm

High Pass Filter

10db Pad

Applications:
Designed for the professional and home project studio

A do-all, general purpose recording Mic

Great for close miking amplifiers with high sound pressure levels

Production, broadcast, and voice-over work

A quality vocal mic suitable for most vocal styles

Included Accessories:
Shock mounted elastic suspension

Foam wind screen

Case

Technical Description

Type: Pressure gradient solid state condenser microphone

Polar Pattern: Cardioid

Frequency response: 20~20000Hz

Sensitivity: 14mV/Pa=-37dB(0dB=1V/Pa)

Output Impedance: <200 Ohm

Load Impedance: >1000 Ohm

Maximum SPL: 142dB SPL for 1% THD @1000Hz(0dB SPL=0.00002Pa)

Noise: (Line): 27dB (A weighted)---17dB

S/N: 77dB

Power Requirement: 48 +/- 4V

Current Consumption: <2.5mA

Circuit: Discrete FET balanced symmetrical output

Connector: Gold-plated 3-pin XLR

Size: dia: 2.1 in. length: 8.9 in.

Weight: 26.9oz
 
Krazy Demon

Krazy Demon

Sicc OG
#2
Jul 25, 2002
1,503
14
0
#2
Studio Projects VTB1 Variable Tube Microphone Pre-Amp

The new 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

A superb vocal mic pre with warm transparent character
Great for use as a tube DI box
Ideal for production, broadcast, and voice over work
Perfect for the professional and home project studio
48 Volt Phantom Power
Phase Reverse
Variable Input Gain Control On Detented Pot
¼ 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 ¼
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

For best Tube-Sound results:

The tube operates best when provided with a solid signal. The best way to accomplish this is to use the on-board metering to set the internal levels. Press the Meter Select switch IN, the meter will now display the signal level withinthe preamp, just before the tube stage. Adjust the GAIN control to get a meter reading within the 0 to +8 range.

With the OUTPUT control at "0", start turning the BLEND control clockwise until the desired sound is heard. Depending on the source material, more or less BLEND will be needed. If the output level is too high or low for your following equipment, adjust the OUTPUT control to compensate.

This won?t change the sound of the blended signal, just the overall level.

VTB1 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
(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

Circuit Topology:
Mic Preamp: Discreet, current-source fed, paralleled-transistor balanced input stage feeding a bipolar opamp balanced-unbalanced converter. Dual feedback design for low distortion performance. 2-Stage design for increased performance; transistor stage provides up to 45dB gain, 2nd stage contributes up to 15dB gain.
Line Input: FET-input opamp buffer with hi input impedance to avoid pickup loading when used as an instrument preamp. 2nd stage provides adjustable gain from 10dB to 30dB, constant hi-impedance is maintained.
Hi-pass filter: 75Hz hi-pass filter for low-freq wind and rumble elimination (3-pole filter @-18dB/oct).
Tube Blend: Constant-level blend control allows the user to smoothly change from an all solid-state path to a tube-based preamp. This allows the user to add the desired amount of tube sound to the signal without having to deal with complicated "tube drive" controls and such. Alternately, it allows the user to use only the solid-state portion of the preamp to get a very low distortion, un-colored sound when desired.
Tube Stage:
12AX7 vacuum tube with DC filament supply for minimum hum and noise. 1st half of tube is operated as a hi-gain amplifier stage, 2nd half operates as a cathode follower to minimize loading of the first stage. A low-voltage plate supply is used to create a "starved-tube" condition for enhanced sound.
Output Stage: Bipolar, lo-noise, hi output-current opamp used for best performance. 1st stage is used to provide additional gain (6dB) and drives the Line out jack and Pin-2 of the balanced out. The 2nd stage provides signal inversion and drive for Pin-3 of the balanced output (effectively an additional 6dB gain).
 
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