Manley MFRC FORCE Four-Channel Microphone Preamplifier

The Manley MFRC FORCE is a premier high-end microphone preamplifier meticulously hand-crafted in California, designed for audio professionals seeking ultimate sonic performance and reliability. Featuring four channels of real high-voltage vacuum tube microphone preamps extracted from the acclaimed Manley CORE®, the FORCE delivers full Class-A amplification with robust 300V DC power rails, ensuring pristine sound with exceptional headroom. Its ergonomic front panel offers silky rotary potentiometers, positive latching switches, gold-plated XLR mic inputs, and direct 1/4" Hi-Z guitar/keyboard inputs, all housed within an exquisitely beautiful chassis optimized for studio use and international voltage compatibility.

The FORCE preamplifier incorporates the legendary MANLEY IRON® input transformer, a sophisticated power supply designed by audio experts led by Bruno Putzeys, and flexible gain settings from 40dB to 50dB plus internal jumpers for extra gain. Additional features include phase reverse, a 120Hz high-pass filter per channel, and seven-segment LED metering for precise level monitoring. Whether used for vocal recording, instrument amplification, or studio mixing, the Manley MFRC FORCE provides a compelling combination of sonic richness, reliability, and rugged American craftsmanship.

Key Features

• Four Channels of high-voltage vacuum tube microphone preamplifiers derived from the Manley CORE® design
• MANLEY IRON® Transformer gold-plated, balanced microphone inputs for excellent signal integrity
• Hi-Z Direct Inputs (1/4" jacks) for instrument and line-level sources with 10 megOhm impedance
• Flexible Gain Control with front panel switches for 40dB or 50dB gain plus internal jumper option for an additional 10dB
• Pure Class-A Amplification with 12AX7 dual triode tubes for smooth and natural sound
• MANLEY POWER® Supply with 300V DC rails, low noise, and universal power input for worldwide use
• Phase Reverse and High-Pass Filter (120Hz) per channel for tonal shaping
• Seven-segment LED Meters for each channel with precise visible audio level feedback
• Ergonomic Controls including rotary potentiometers and positive latching switches for reliable operation
• Rugged Chassis designed and handcrafted in Southern California for durability and style

Specifications

• Vacuum Tubes: 4 x 12AX7WA dual triodes
• Balanced Transformer Coupled XLR Microphone Input Impedance: 1250 Ohms
• Unbalanced 1/4" Direct Input Impedance: 10 Meg Ohm
• Maximum Input Mic input (Low Gain Setting): -5 dBu or 435mV RMS @ 0.5% THD
• Maximum Input Mic input (High Gain Setting): -25 dBu or 44mV RMS @ 0.5% THD
• Maximum Input Direct input (Low Gain Setting): +24 dBu or 12V RMS @ 0.5% THD
• Maximum Input Direct input (High Gain Setting): +17 dBu or 5.5V RMS @ 0.5% THD
• Maximum Output (1kHz Sine, into 100 kOhm load, 0.1% THD+N: +35 dBu
• Maximum Output (1kHz Sine, into 100 kOhm load, 0.1% THD+N: 43V RMS
• Maximum Output (1kHz Sine, into 600 Ohms load, 0.1% THD+N): +22 dBm
• Hi-current WFDRIVE Balanced Output Impedance: 50 Ohms
• Output Headroom (referenced to +4 dBu): 31 dB
• Dynamic Range: 118 dB @ LOW GAIN, 100 dB @ HI GAIN
• THD & Noise (1Khz @ +4dBu BW 22Hz-22KHz): 0.004% at Low Gain setting
• THD & Noise (1Khz @ +4dBu BW 22Hz-22KHz): 0.04% at Hi Gain setting
• Noise Floor Micpre (A WGT): - 85dB @ LOW GAIN, -66dB @ HI GAIN
• Signal to Noise Ratio (Ref. to +4dBu): 87dB @ LOW GAIN, 68dB @ HI GAIN
• EIN (22-22kHz BW, A WGT): -129dB with 150 Ohm source impedance @ LO GAIN
• Frequency Response: 20 Hz to 20 kHz -0.1dB, +0.3 dB
• 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 (Output Level): -22 dBu
• High Signal Red LED (Output Level): +24 dBu
• AUTOMUTE warmup delay: 30 seconds
• Power consumption: 36 Watts
• Operating mains voltage: 90 to 254 VAC (internal universal supply)
• Mains Voltage Frequency: 50~60Hz
• Dimensions: 19" x 3 1/2" x 7" (occupies 2u)
• Unit weight: 8.6 lbs.
• Shipping weight: 11.8 lbs.

Package Content

• Manley MFRC FORCE Unit: Four-channel microphone preamplifier
• Power Cable: Universal voltage power cord
• User Manual: Detailed operation and maintenance guide
• Warranty Card: Manufacturer warranty documentation