Rolls MP507 Tube Microphone Preamp with Phantom Power

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The MP507 is a single channel preamp that utilizes a single 12AX7 vacuum tube. It has a MU-Metal audio transformer to decrease noise and enhance the sound quality of the XLR input. The design of the MP507 utilizes a high speed self regulated switching power supply to generate 230V of clean usable plate voltage for the 12AX7 vacuum tube. The result is a clean and powerful sounding tube preamp.

Rolls MP507 Features:

  • Real 230V tube plate voltage
  • Internal high speed self regulating switching power supply
  • MU metal shielded input audio transformer
  • 48V of clean, quiet phantom power

Rolls MP507 Specifications:

  • Input Impedance: XLR: 600 O (Transformer balanced)--- 1/4”: 1m O
  • Output Impedance: XLR: 100 O --- 1/4”:100 O
  • THD: .15%
  • S/N Ratio: >110 dB
  • Maximum Input Level: -30 dB mic +4 line XLR, -10 dB 1/4”
  • Maximum Output Level: +16 dB XLR, +10 dB 1/4”
  • Pad: - 37 dB
  • Frequency Response: 20 - 25kHz +/-3 dB
  • Dimensions: 3” X 5.5” X 6”
  • Weight: 1.6 lbs.
  • Power: 15 VDC