Rolls MP507 - Tube Microphone Preamplifier

Rolls MP507 - Tube Microphone Preamplifier

Rolls MP507 - Tube Microphone Preamplifier

B&H # ROMP507 MFR # MP507
Rolls MP507 - Tube Microphone Preamplifier

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Important Notice: This item is non-cancelable and non-returnable
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Expected availability: 7-10 business days 
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Product Highlights

  • Single 12ax7 Vacuum Tube
  • Mic and Instrument Input
  • Real 230V Tube Plate Voltage
  • Internal Self Regulating Switching PSU
  • MU Metal Shielded Input Transformer
  • +48V, Polarity Switch, 37dB Pad
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Official Rules


NO PURCHASE IS NECESSARY TO ENTER OR WIN. The B&H $1,000.00 Giveaway (the "Giveaway" or "Sweepstakes") is void where prohibited by law and is sponsored by B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 ("Sponsor"). It is not sponsored or endorsed by Facebook or Twitter in any way.

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  • 1Description
The Rolls MP507 - Tube Microphone Preamplifier utilizes a 12ax7 vacuum tube and a MU-Metal audio transformer to decrease noise and add warmth to this single channel microphone or instrument preamplifier. It is suitable for live and studio applications that require the sonic character that only vacuum tube designs can provide. The preamplifier features a high speed self regulated switching power supply to generate the required 230V of usable plate voltage by the 12ax7 vacuum tube.

The unit includes a -37 dB pad, a 180° polarity reversal switch, and a switch for applying +48V phantom power while delivering a frequency response of 20 to 25,000 Hz with a THD of 0.15% and a S/N ratio of greater than 110 dB.
In the Box
Rolls MP507 - Tube Microphone Preamplifier
  • PS27s 15VDC 100-240VAC Wall Power Adapter
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
    Inputs 1x XLR-3F balanced microphone
    1x 1/4"TS unbalanced instrument
    Outputs 1x XLR-3M balanced line level
    1x 1/4" TS unbalanced line level
    1x 1/8" stereo (left, right, and ground)
    Input Impedances XLR-3F: 600 Ω (Transformer balanced)
    1/4": 1 mΩ
    Output Impedances XLR-3M: 100 Ω
    1/4": 100 Ω
    Phase 180°
    Phantom Power +48 VDC
    Pad -37 dB
    Ground Lift Yes
    THD 0.15%
    S/N Ratio > 110 dB
    Maximum Input Level -30 dB mic, +4 line XLR, -10 dB 1/4"
    Maximum Output Level +16 dB XLR, +1- dB 1/4"
    Frequency Response 20 to 25,000 Hz ±3 dB
    Power 15 VDC
    Power Requirements 100 to 240 VAC
    Dimensions 3.0 x 5.5 x 6.0" (7.6 x 14 x 15 cm)
    Weight 1.6 lb (0.73 kg)

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