Rolls MP507 Tube Microphone Preamplifier

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