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Manley Labs Force 4-Channel Vacuum Tube Microphone Preamplifier

SKU: MLMFRC MFR: MFRC
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Key Features

  • Experience pristine sound with this 4-channel vacuum tube microphone preamplifier.
  • Achieve versatile tone shaping with selectable gain on each microphone preamp channel.
  • Enjoy low noise performance, capturing every nuance of your recordings flawlessly.
  • Utilize high input impedance for optimal signal clarity with various microphones.
  • Connect seamlessly with balanced XLR inputs and outputs for studio integration.
  • Rely on robust build quality, ensuring years of dependable performance in your studio.
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Review Summary

2021-05-28T08:42:12

Rated 5 out of 5

Sounds Greatt

Great Pre amp. I love the tubes. a completely different vibe

BLAINE J.

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Manley Labs Force 4-Channel Vacuum Tube Microphone Preamplifier Specifications

  • Vacuum Tubes

    4x 12AX7WA dual triodes

  • Microphone Input Impedance

    Balanced Transformer Coupled XLR: 1250Ohms

  • Unbalanced 1/4" Direct Input Impedance

    10MOhm

  • Maximum Input

    Mic input (Low Gain Setting): -5dBu or 435mV RMS at 0.5% THD
    Mic input (High Gain Setting): -25dBu or 44mV RMS at 0.5% THD
    Direct input (Low Gain Setting): +24dBu or 12V RMS at 0.5% THD
    Direct input (High Gain Setting): +17dBu or 5.5V RMS at 0.5% THD

  • Maximum Output

    1kHz Sine, into 100kOhm load, 0.1% THD+N: +35dBu
    1kHz Sine, into 100kOhm load, 0.1% THD+N: 43V RMS
    1kHz Sine, into 600Ohms load, 0.1% THD+N): +22dBm

  • Balanced Output Impedance

    Hi-current WFDRIVE: 50Ohms

  • Output Headroom

    31dB (referenced to +4 dBu)

  • Dynamic Range

    118dB at LOW GAIN, 100dB at HIGH GAIN

  • THD & Noise

    At Low Gain setting (1Khz at +4dBu BW 22Hz-22KHz): 0.004%
    At Hi Gain setting (1Khz at +4dBu BW 22Hz-22KHz): 0.04%

  • Noise Floor Micpre (A WGT)

    - 85dB at LOW GAIN, -66dB at HIGH GAIN

  • Signal to Noise Ratio

    87dB at LOW GAIN, 68dB at HIGH GAIN (Ref. to +4dBu)

  • EIN

    -129dB with 150 Ohm source impedance at LOW GAIN (22-22kHz BW, A WGT)

  • Frequency Response

    20Hz to 20kHz -0.1dB, +0.3dB

  • Gain via Microphone Input

    40 LOW or 50dB HI GAIN (60dB available via internal jumper)

  • Gain via Line Input

    20 or 30dB (40dB available via internal jumper)

  • Low Signal Green LED

    -22dBu (Output Level)

  • High Signal Red LED

    +24dBu (Output Level)

  • Automute warmup delay

    30 seconds

  • Power Consumption

    36Watts

  • Operating mains voltage

    90 to 254VAC (internal universal supply)

  • Mains Voltage Frequency

    50 to 60Hz

  • Rack Height

    2U

  • Dimensions (W x H x D)

    19 x 3.5 x 7" / 482.60 x 88.90 x 177.80mm

  • Weight

    8.6lbs / 3.90kg

  • UPC Code

    890833001882

About Manley Labs Force 4-Channel Vacuum Tube Microphone Preamplifier

FEATURED REVIEWS

Sounds Greatt

By BLAINE J.

Great Pre amp. I love the tubes. a completely different vibe

You can experience the epitome of high-quality audio with the Force 4-Channel Vacuum Tube Microphone Preamplifier, a professional-grade product from Manley Labs, a leading name in the high-end studio gear industry. This innovative preamplifier harnesses the power of vacuum tube technology to deliver a warm, rich sound that's perfect for both live performances and recording sessions.

This reliable and durable preamplifier is a testament to Manley Labs' commitment to superior craftsmanship. It features an ergonomic design with thoughtfully organized controls, including silky, bulletproof rotary potentiometers and positive latching feature switches. The convenient Direct Input 1/4" jacks and seven-way LED metering for each channel provide instant visible feedback for audio levels, enhanced with a double-inlay CNC-milled accent.

Your microphone signals enter through gold-plated XLR connectors, straight into the Manley IRON Mic input transformer. Line level or instrument level guitars and keyboards can be connected via the front panel 1/4" Hi-Z 10 megOhm jacks. The input level control also acts as a Variable Input Pad, and Phase Reverse and 120Hz High Pass filters can be invoked in the circuit. The 12Ax7 dual triode amplifying stage operates in pure Class A, offering selectable GAIN of 40dB or 50dB via the front panel switches, with an additional 10dB of gain available via internal jumpers.

The Force 4-Channel Vacuum Tube Microphone Preamplifier is powered by an innovative power supply designed specifically for Manley Labs, High Voltage vacuum tubes, and audio. This power supply provides 300 Volt DC rails to run the vacuum tubes, beefy 6 Volt lines to power them up, along with several other voltage rails for the phantom power and various solid-state control voltages. This results in high headroom and superior sonic performance that you won't find in any 500-series design.

This preamplifier is a testament to Manley Labs' commitment to delivering high-quality, professional-grade audio equipment that's built to last. With its high number of channels, it's suitable for use in a variety of settings, from live performances to recording studios. Experience the difference with the Force 4-Channel Vacuum Tube Microphone Preamplifier.

Manley Labs Force 4-Channel Vacuum Tube Microphone Preamplifier Features

  • High-quality 4-channel vacuum tube microphone preamplifier from Manley Labs
  • Features gold-plated XLR connectors and front panel 1/4" Hi-Z 10 megOhm jacks for superior connectivity
  • Includes innovative power supply designed specifically for High Voltage vacuum tubes and audio
  • Provides selectable GAIN of 40dB or 50dB, with an additional 10dB of gain available via internal jumpers
  • Ergonomic design with thoughtfully organized controls and seven-way LED metering for each channel
  • Suitable for use in a variety of settings, including live performances and recording studios

Key Features

  • Experience pristine sound with this 4-channel vacuum tube microphone preamplifier.
  • Achieve versatile tone shaping with selectable gain on each microphone preamp channel.
  • Enjoy low noise performance, capturing every nuance of your recordings flawlessly.
  • Utilize high input impedance for optimal signal clarity with various microphones.
  • Connect seamlessly with balanced XLR inputs and outputs for studio integration.
  • Rely on robust build quality, ensuring years of dependable performance in your studio.

What's in the box:

  • Manley Labs Force 4-Channel Vacuum Tube Microphone Preamplifier
  • Manley Labs 90 Day Limited Warranty (5 Year with Registration)