Radial Engineering Twin-Servo Mic Preamplifier

The Radial Engineering Twin-Servo uses the renowned JE-990 circuit, first developed by Deane Jensen in 1988, and now available in a 500 series format. Its impressive performance comes from two 100% discrete 990 op-amps working together to deliver 60 dB of gain with less than 1/10th the distortion and double the bandwidth of a single-stage design.

This also significantly reduces noise at mid and low levels, making it ideal for recording with a wide dynamic range. To minimise phase distortion on the Radial Engineering Twin-Servo, all capacitors have been eliminated from the audio signal path and replaced with two DC servo feedback circuits.

Oversized Jensen transformers are used at both the input and output, offering a frequency response from 0.5 Hz to 150 kHz. The result is a highly detailed and accurate microphone preamp, perfect for any critical recording scenario.

Applications

• Using the Twin-Servo with a condenser mic The Jensen Twin-Servo has almost unlimited bandwidth and tremendous headroom. This makes it a perfect choice for the most demanding recording, particularly when recording highly dynamic signals such as vocals or orchestral instruments.
• Using the Twin-Servo with an active DI When recording live, capturing the direct feed from an instrument can provide much more consistent results as bleed from other instruments can be eliminated. Connect a piezo transducer to the Radial PZ-DI and send this to the Twin-Servo for amazing bottom end!
• Using the Twin-Servo with a ribbon mic Most modern ribbon microphones have plenty of output and can connect directly to the Twin-Servo’s low noise circuitry. When using old vintage mics, add the Radial McBoost to increase the output by up to 25dB for a total of about 85dB of gain!