Mercenary Audio - Jensen Twin Servo 990 Mic Pre Four Channel

The majority of John Hardy product is built to order, so be forewarned, there may be a small wait time for you to receive your mic pre. We try to stock the Hardy pres, but the demand is such that as soon as our ‘stocking’ units are available, they have already been sold. Please contact us if you require any additional information.

Jensen Twin Servo 990 features

The basic circuit was originally published as an application note by Jensen for their finest microphone input transformer, the JT-16-B. Each channel uses two precision 990C operational amplifiers modules, developed and patented by Jensen, to achieve one tenth the distortion and twice the bandwidth of a single stage design.

The Jensen Twin Servo 990 has a 19" wide mainframe rack-mount chassis (1.75"H x 19"W x 8"D) and can be ordered with 1 to 4 channels. Additional channels can be easily added later up to the total capacity of the mainframe.

JT-16-B Input Transformer
Two 990 Discrete Op-Amps Per Channel
Elimination Of All Coupling Capacitors From The Signal Path.
JT-11-BMQ Output Transformer
Input Bias Current Compensation Circuitry And DC Servo Circuitry.
Fully Sealed Conductive Plastic Gain Control. Provides smooth continuos gain adjustments from 16dB to 60dB.
20 Ohm Mic Switch
Polarity Reverse Switch
Phantom Power Switch
All Front Panel Switches Are LED Illuminated
Gold Plated XLR Connectors.
Ground Lift Switch
VU-1 20 segment LED meter, with separate peak LED, for monitoring preamp output.
Toroidal Power Transformer With Additional Shielding.
Universal Power Supply.
Chassis Ground Isolation Switch.
Pin 2 Or Pin 3 High. Internal jumpers make changes in the field easy.

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