PowerTube Specifications

The PowerTube is a microphone amplifier that takes on a traditional ‘vintage’ approach to generating gain. In other words, instead of using the latest technology, it goes back to the glory days of analog audio by employing a transformer coupled input, high voltage tube gain stage and class-A output. And although one can find mic preamps that ‘out-spec’ the PowerTube, there is no denying – once you give it a listen, you will find that it sounds spectacular.

Audio circuit type: 100% discrete class A with 12AX7 tube drive
Transformer: Jensen JT-115KE
Frequency response: 20Hz ~ 20KHz +0/-1dB
Dynamic range: >93dB
Gain: +75dB when used with Workhorse*
Total harmonic distortion: 0.05%
Intermodulation Distortion: 0.011%
Input Impedance: 900Ω
Output Impedance: 200Ω
Common Mode Rejection Ratio: >84dB
Equivalent Input Noise: -128dBu @ maximum gain
Maximum Output: +22dBu
Current Draw: 235mA
180° polarity reverse, Ground lift, HPF, Level Control, Phantom Power, OmniPort
Input Connectors: XLR
Output Connectors: XLR
Weight: 1.5lbs (0.7Kg)
Shipping size (L x W x D): 9 x 6.5 x 2 (inches)
Conditions: For use in dry locations only between 5°C and 40°C
Warranty: Radial 3-year, transferable

PowerTube Resources

Part no: R700 0115 00