The Gyraf Audio G9 Tube Preamp is a dual true tube microphone preamp. It’s a simple, yet powerful unit, based on a variable-gain input tube stage driving a tube SRPP output stage – No silicon in signal path.
The Gyraf Audio G9 Tube Preamp features a classic design that will fit into every studio. The two handles make it easy to transport or move the Gyraf Audio G9, and the material of the switches is a must feel experience.
Tech
The Gyraf Audio G9 Tube Preamp is floating, transformer balanced at line and mic inputs, as well as on output. Input impedance for the mic input is some 1KOhm, line is some 10KOhm, Inst. more than 2MOhm, and output impedance is less than 1K Ohm. Although semiconductors are used in the Gyraf Audio G9, they're confined to powersupply functions. At no time will your audio pass through anything but transformers, tubes and passives. So it's all about REAL tube audio here.
Controls
Controls of the Gyraf Audio G9 includes the input level switch, the output level pot, the input switch, the low-cut switch and the phase switch. The input level switch - in eleven steps - sets the raw gain of the first stage, thus allowing you to control the input level, the "drive" for the preamp. The input switch is used to select either Line, Mic, or Mic-with-P48 as input for the Gyraf Audio G9. If you insert a jack at the front panel socket marked "Inst.", this will break the signal selected on the input switch, and in stead have a very-high impedance instrument input - perfect for DI of e.g. bass guitar. A gentle highpass filter of either 80 or 160Hz is activated by the "Low-cut" switch, and the Gyraf Audio G9's absolute phase can be reversed using the "Phase" switch.
Gyraf Audio G9 Tube Preamp Features
- A simple yet powerful unit, based on a variable-gain input tube stage driving a tube SRPP output stage
- Input level switch - in eleven steps - sets the raw gain of the first stage
- Output level pot attenuates signal to the output stage
- Input switch is used to select either Line, Mic, or Mic-with-P48 as input for the unit
- "Low-cut" switch activates a gentle high-pass filter of either 80 or 160Hz
- "Phase" switch is used to reverse the unit's absolute phase
- The unit is Floating, transformer balanced at line and mic inputs, as well as on output
- Semiconductors are used for power supply functions only
- Audio passes through transformers, tubes and passives only
Gyraf Audio G9 Tube Preamp Specifications
- Input Impedance: Mic Input; 1K Ohm, Line Input; 10K Ohm, Instrument; > 2M Ohm
- Output Impedance: < 1K Ohm
- Controls: Input Level Switch, Output Level Pot, Input Switch, Low-Cut Switch & Phase Switch
- Power Requirements: 230 V
Gyraf Audio G9 Tube Preamp Includes
- Gyraf Audio G9 Tube Preamp
- Power Cord
- 2 Year Warranty
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