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Radial Twin-Servo 500 Series Microphone Preamp

500 Series Microphone Preamp Module
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Item ID: TwinServo
Radial Twin-Servo 500 Series Microphone Preamp
Price:$777 and 77 cents
Special Financing - Ends Jun 2, 2026. $17/month with 48 month financing*

We Can Get It Fast!

While this isn't an item we normally stock, we can still get it to you as fast as possible due to our great relationship with Radial. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated May 2026.

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Radial Twin-Servo 500 Series Microphone Preamp
We Can Get It Fast!
Price:$777 and 77 cents
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This article was Written By

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An Ultra-clean Preamp Module for Your 500 Series Rack

The Radial Twin-Servo is a transparent microphone preamp module for your 500 Series rack. The Twin-Servo contains two discrete 990 op-amps, which eliminate capacitors from its signal path for ultra-clean operation. You also get oversized Jensen transformers for maximum headroom, and the Twin-Servo includes a hyper-accurate 10-segment meter, plus a dual-gang pot for optimal gain at all levels. This feature-rich mic pre includes a polarity reverse, highpass filter, -15dB pad, and +48-volt phantom power. At Sweetwater, we appreciate the flexibility afforded by the Twin-Servo’s convenient front-panel combination input, which accommodates balanced XLR and 1/4-inch connections. If you want to fuel your 500 Series rack with a great-sounding mic pre, the Twin-Servo will exceed your expectations.

Radial Twin-Servo 500 Series Microphone Preamp Features:

  • 2 discrete 990 op-aps eliminate capacitors for clean, transparent operation
  • Oversized Jensen transformers provide maximum headroom
  • 10-segment meter ensures hyper-accurate VU readings
  • Dual-gang pot controls dual op-amps simultaneously for optimal gain at all levels
  • Includes polarity reverse, highpass filter, -15dB pad, and +48V phantom power
  • Front-panel combination input accommodates balanced XLR and 1/4-inch connections

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Tech Specs

  • Preamp Type: Solid State
  • Number of Channels: 1
  • Frequency Response: 0.5Hz-150kHz
  • Phantom Power: Yes
  • Pads: -15dB
  • Polarity Switch: Yes
  • EQ: Highpass Filter (6dB/octave, 150Hz)
  • Analog Inputs: 1 x XLR-1/4" combo
  • Module Slot Size: Single
  • Depth: 5.5"
  • Weight: 1.75 lbs.
  • Manufacturer Part Number: R700 0111 10

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