Radial Jensen Twin-Servo 500 Series Preamplifier

1,500.00 RRP 1,515.00 (including VAT @ 23%)

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This item is available to order, and we do not currently have the item in stock.

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"Estimated delivery to you" is our estimate of when we will be able to deliver the product to you, based on our supplier's normal delivery timescales. If we become aware it is going to take significantly longer than normal to deliver this item, we will let you know, otherwise, we will advise by email or text message when the item has been dispatched from our distribution centre.

Estimated delivery to you: 13th December 2016
FREE Delivery available.

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30 day money back guarantee included

30 day money back guarantee included

Once the product is delivered, you have 30 days to decide that you definitely want to keep it. If you decide it is not suitable for any reason, you can return it back to us for replacement or full refund, including standard delivery charges.

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Optional: 5 year warranty: €97.50
(Includes 90 day money back guarantee)


The product price includes a one year warranty and 30 day money back guarantee.

However, the Gear4music extended warranty scheme provides an enhanced service, and is designed to offer a higher level of protection than many 'free' warranties offered by some retailers and manufacturers.

The highlights of this enhanced warranty service are:

  • Warranty is extended to 5 years from the date of delivery.
  • Our Money Back guarantee is extended from 30 days to 90 days (terms apply after 30 days)
  • Collection and delivery costs are included for the first two years
  • Claim 50% cash back on the cost of the policy after 5 years if it has not been used!
  • Warranty is transferable if the item is re-sold
  • Loan or replacement equipment will be provided if the product isn't repaired within 30 days
  • If an item can not be repaired, a similar alternative product or cash discount (as defined in this policy) will be offered
  • The policy can be cancelled within 30 days, and at any time after that for a pro-rata discount

Please note that this extended warranty is currently only available on products sold within the EU or EEA, and is subject to the terms and conditions as detailed on the extended warranty certificate provided.

For customers in outlying areas of the country, the price of the Extended Warranty may be marginally higher, due to the potential for higher collection and redelivery transport costs.

This enhanced warranty is in addition to the standard Gear4music and manufacturer warranty policies, and the Gear4music terms and conditions of trade. No statement or condition of sale contained within these terms affects or restricts your statutory rights as defined under the Consumer Contracts Regulation 2014.

Product Ref: 68531

  • Low Impedance Transformers for Great Sound Capturing
  • 990C Discrete Op-Amplifier Provides Unrivalled Quality
  • Lunhbox 500 Series Size for Easy Portability
  • Ability to Record 20 Ohm Microphones
  • 180 Degree Polarity Switch for Phase Correction

Radial Jensen Twin-Servo 500 Series Preamplifier

The Jensen Twin Servo 500 condenses all the great features of the 990 microphone preamp into a lunchbox sized format. The 500 uses the JT-16-B mic-input transformer, which Jensen claim to be their most sophisticated to date. There?s also a JT-11-DM output transformer, which again is Jensen's most refined way of providing exceptional audio quality. High quality materials and attention to detail makes the Twin Servo 500 an ideal product for someone who doesn?t want to compromise on performance, but prefers a 500 series sized piece of equipment.

Product Ref: 68531

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Full Description

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Jensen are widely regarded as a company producing studio quality products with strict attention to detail. The Twin Servo 500 continues this. The JT-16-B transformers have a low impedance ratio of 150:600 Ohms, meaning they can handle higher signal and maintain a low distortion with flatter response and a wider bandwidth. The transformers also remove the need for input coupling capacitors, meaning the Twin Servo 500 will last longer without wearing or smearing the sound quality.

The 990C discrete op-amp is another feature where strict measurements have lead to an output transformer that settles for nothing but the best. The 990C has been engineered with each part designed around one another for unrivalled quality from any monolithic op-amp. This is then coupled with the JT-11-DM output transformer that has all the quality of the preamp from the Twin Servo 990 condensed to a smaller size for convenience. You can even bypass the transformer to record just the signal path if you require.


  • Format: 500 Series
  • XLR Inputs: 1
  • 1/4'' Inputs: 1
  • Mic-Input Transformer JT-16-B
  • Op-Amplifiers 2 x 990C
  • Output Transformer: JT-11-DM
  • Input Transformer Impedance Ratio: 150:600 Ohms
  • Frequency Range: 0.2 Hz to 150 kHz
  • High Pass Filter: Yes
  • Phantom Power Switch: Yes
  • 20 Ohm Mic Switch: Yes
  • Polarity Switch: Yes, 180 Degrees
  • Input Transformer Attenuation: 20 dB Switch
  • Transformer Bypass: Yes
  • Maximum Gain: 60 dB
  • Your order may be delivered with a plug adapter
    If any electrical items in your order are supplied with a United Kingdom plug connection, a suitable plug conversion adapter will be included free of charge.