• Vacuum Tubes: 1 x 12AU7 gain and 1 x 12BH7 (or 6414 or 5965) White Follower Dual Triodes
• MANLEY input transformer with pure nickel laminations potted in mu-metal case. 3K Ohm input Z
• PHASE REVERSE switch for balanced XLR input
• Alternate transformerless 1/4" HI-Z (5K Ohm) input
• BYPASS switch & AUTO-MUTE w/warmup delay
• Silent conductive plastic PEAK & SHELF controls
• Sealed gold-contact Greyhill frequency select switches
• Hi-current drive <50 Ohm LO-Z XLR & 1/4" outputs
• Balanced Transformer Coupled XLR Outputs
• Flat frequency response from 10Hz-70KHz
• <0.01% THD @ 1kHz
• S/N Ratio: 116 dB
• Adjustable FEEDBACK / GAIN: Unity ±5 dB
• Max. output: +30 dBv
• Power consumption: 18 watts
• Operating mains voltage: Units are purpose built for original destination country's mains voltage: 100V, 120V, or 220-240VAC as indicated on the serial number badge. Power transformer must be replaced in order to change mains operating voltage. 120VAC units may NOT be rewired to put the primaries of the power transformer in series for 220-240V operation or a large radiated field of hum will develop. If changing locations/voltages, the power transformer must be replaced with the dedicated one for the voltage at which it will operate.
• Mains Voltage Frequency: 50~ 60Hz
• Dimensions: 19" x 1 3/4" x 10" (occupies 1u)
• Shipping weight: 12 lbs.

The Manley Mid Frequency EQ is designed to complement, not replace, a standard EQP-1A. While the EQP-1A excels at broad, musical boosts in the low and high frequencies, the Mid Frequency EQ focuses specifically on the crucial midrange. It features sharper, bell-shaped curves for its boost and cut controls, allowing for more precise and surgical adjustments in the 200 Hz to 7 kHz range. This makes it a perfect "problem solver" for cleaning up mud or adding presence in the midrange, where the EQP-1A is less effective.

The Manley Mid Frequency EQ is best suited for sources that are central to a mix. Its ability to add presence and clarity makes it a go-to for vocals, acoustic guitars, and snare drums. It is also an excellent tool for shaping the sound of electric guitars, pianos, and horns. Because its passive circuit provides musical, natural-sounding results, it is highly versatile and can be used for both tracking and mixing.

A passive EQ is a type of equalizer that uses passive components—such as resistors, capacitors, and inductors—to shape the tone without any active amplification. The benefit of this design is that it introduces very little phase shift or distortion, resulting in a more natural and musical sound. The Mid Frequency EQ pairs its passive EQ circuit with a high-quality, all-tube make-up amplifier to restore gain, ensuring the final output is robust, clean, and full of analog character.

The "DIP" control on the Mid Frequency EQ is used to cut or reduce a specific frequency band. It is a powerful tool for cleaning up a mix, as it allows you to remove unwanted "boxiness" from a snare, reduce harshness in a vocal, or eliminate mud from a bass line. The DIP control is particularly effective because its bell-shaped curve is designed to be surgically precise, allowing you to remove a specific problem frequency without affecting the surrounding audio.

The Manley Mid Frequency EQ's all-tube circuit utilizes a 12AU7 and a 12BH7 vacuum tube. These tubes are carefully selected for their low-noise performance and their ability to provide the clean gain and immense headroom required to bring the signal back up after the passive EQ stage. This combination of tubes is key to the EQ's rich, warm, and musical sonic character.

Yes, the Manley Mid Frequency EQ is an excellent tool for mastering. Its precise and musical controls are ideal for making subtle, but impactful, changes to a mix. It can be used to add a touch of clarity to the midrange, solve a problematic frequency issue, or add a subtle presence to a mix without compromising its integrity. Its transparent sound and robust build make it a perfect fit for a high-end mastering chain.