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Studio Projects VTB1 Single Channel Variable Tube Microphone Preamplifier
The Studio Projects VTB-1 is single channel low cost microphone preamplifier, incorporating true class A/B switching. The unit is perfect for the professional and home project studio doing production, broadcast and voice over work.
A "Tube Drive" control allows the user to blend as little or as much of the 12AX7 tube circuitry as required. The VTB-1 can go from a pristine solid state sound, to any combination of Tube Drive, including hard distortion for guitars and bass.
- Microphone Preamp
- Vocal microphone preamp with warm transparent character that doubles as a Tube DI Box. Discreet, current-source fed, paralleled-transistor balanced input stage feeds a bipolar opamp balanced-unbalanced converter. A dual feedback design provides for low distortion performance while a two stage design provides up to 45dB gain with the second stage contributing up to 15dB gain.
- Line Input
- FET-input opamp buffer with hi-input impedance to avoid pickup loading when used as an instrument preamp. Second stage provides adjustable gain from 10dB to 30dB with constant hi-impedance maintained.
- Hi-pass Filter
- 75Hz, 3-pole -18dB/oct high-pass filter for low-frequency wind and rumble elimination.
- 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 a DC filament supply for minimum hum and noise. First half of the tube is operated as a high-gain amplifier stage while the second 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, high output-current opamp used for best performance. The first stage is used to provide 6dB of additional gain and drives the line out jack and pin-2 of the balanced out. The second stage provides signal inversion and drive for pin-3 of the balanced output, effectively providing an additional 6dB of gain.
| Number of Channels | Single |
| Inputs |
1 x XLR Microphone 1 x 1/4" TRS phone Line (front panel) 1 x 1/4" TRS phone Send/Return (Insert) |
| Output |
1 x XLR 1 x 1/4" TRS phone |
| Phantom Power | +48V |
| Multi Function | No |
| Gain Range | 72dB |
| Maximum Output Level | Not specified by manufacturer |
| Frequency Response | 20Hz to 20kHz, +0/-0.25dB, ref 1kHz |
| Noise | Mic EIN: -128dBu (150 Ohm source, 60dB gain) |
| Dimensions (WxDxH) | 1U half rack space |
| Weight | Not specified by manufacturer |
| Specialties | Microphone impedence switch allows for use with ribbon microphones |
REVIEW SNAPSHOT®
by PowerReviews(based on 3 reviews)
Ratings Distribution
100%
of respondents would recommend this to a friend.
Pros
- Easy to use (3)
- Good audio (3)
- Versatile (3)
Cons
Best Uses
REVIEWS
Reviewed by 3 customers
Sort by
Displaying reviews 1-3
Pros
- Clear Sound
- Easy To Use
- Versatile
Cons
Best Uses
- Home Studio
- Performances
- Professional Recording
Comments about Studio Projects VTB1 Microphone Preamp:
I purchased this preamp for use with my guitar rig. I run delay and reverb after my amp mic, and I need an inexpensive preamp to use for live gigs and practice. This preamp sounds fantastic using both an sm57, and an e609. I also had a chance to try it with an inexpensive ribbon mic and it sounded significantly better than a set of apogee preamps, thanks to impedance matching ability of the VTB1. I don't find myself using the tube blend for distortion, since I'm not a huge fan of the starved plate sound, but I do blend some tube in for added warmth. overall this is a great preamp live, or in the studio, and I would recommend it to anyone.
Pros
- Clear Sound
- Easy To Use
- Versatile
Cons
Best Uses
- Amateur Recording
- Home Studio
Comments about Studio Projects VTB1 Microphone Preamp:
Highly recommended for people on a budget. Definately improved the quality of my vocals.
Pros
- Clear Sound
- Easy To Use
- Powerful
- Professional Functions
- Versatile
Cons
Best Uses
- Amateur Recording
- Professional Recording
Comments about Studio Projects VTB1 Microphone Preamp:
Nice transparent sound on guitar. Tube blend is a great feature, and the reason I chose this product. I most often use it while miking a guitar amp to add some warmth before it hits my DAW. I look foward to using it on vocals and acoustic guitar.
Displaying reviews 1-3
Cables
-
- Original: $15.99
- Save: $1.60
- Price: $14.39
- GBP 9.19
Additional Hardware
- Price: $19.99
- GBP 12.76
This is a special order item. Est. arrival at B&H is 6-10 weeks (subject to availability). Your order will be charged at the time of shipment.
What's in the Box
- AC Power Supply
- One (1) Year Warranty
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