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ManleyMassive Passive Stereo Tube EQ


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Manley Massive Passive

Offering unbeatable sonic-sculpting with a multitude of shapes and sizes, the Manley Massive Passive Stereo EQ is a completely passive, two-channel parametric equalizer that utilizes clean frequency balancing with tube-powered amplification. Each channel of the Massive Passive features four bands with distinct frequency ranges, each showcasing eleven possible frequencies that represent the low, low-mid, high-mid, and high bands found in traditional equalizers. Each band can be shaped as a bell or shelf to their respective frequency ranges, showcasing variable bandwidth for both shapes as well as +/-20dB sculpting range. Additionally, each band can be disengaged making room for your signal path to be less cluttered and unaffected.

In the middle section, the Massive Passive features control over the entire unit's power, each channel's engage toggle, channel gain, and additional channel low and high pass filters. These filters each offer quite steep cut-off slope of 18dB/oct with five possible frequency centers per filter. The low pass filter is a bit more unique in its design with two of the five frequency centers changing its slope, featuring a 24dB/oct slope at 12kHz and a brick-wall-like massive slope of 60dB/oct at 18kHz to cut out miscellaneous highs. Massive Passive's gain knobs can apply extra level if needed but are more-so there for matching levels to your previously unprocessed signal.

The all-passive EQ design utilizing metal film resistors, film capacitors, and hand-wound inductors bring an organic nature to your sound, while the high-voltage vacuum tube amplification gives you insane amounts of headroom to flex and fill out your sound. The Manley Massive Passive Stereo EQ is a versatile and tone-sculpting tool that compliments any sound as well as any studio.

Massive Passive Features

  • Stereo tube equalizer
  • Two channels of four-band passive EQ, ranging 22Hz-27kHz
  • Each band is capable of boosting or cutting +/-20dB
  • Each band is engageable per channel with selectable bell or shelf control
  • Steep high and low pass filters with five positions per filter with ranging slopes per position:
    • High pass 18dB/oct: 22, 39, 68, 120, and 220Hz
    • Low pass 18dB/oct: 6, 7.5, and 9kHz
    • Low pass 24dB/oct: 12kHz
    • Low pass 60dB/oct: 18kHz
  • Gain trim knobs per channel ranging -6dB to +4dB for balancing against dry signal (check with EQ in per channel)
  • Completely passive tone-shaping circuitry with vacuum tube make-up gain and line drivers
  • Dual inputs and outputs per channel offer balanced XLR and 1/4" TRS as well as unbalanced 1/4" TS
  • Utilizes Manley's fantastic MANLEY POWER for providing the highest headroom via high-voltage power for your tubes
  • Inputs: Balanced XLR & 1/4" (accepts unbalanced)
  • Outputs: Balanced XLR (accepts unbalanced) & Unbalanced 1/4"
  • Level +4 dBu nominal
  • Bypass Switch bypasses EQ & tube circuits: 1/4" Jacks (not hardwire)
  • Bypass Switch bypasses EQ, tube circuits & Input Buffer: XLR Jacks (Hardwire Bypass)
  • Gain Trim: -6dB - 0dB - +4dB
  • 44 Frequencies (roughly 1/4 octave spacing)
  • Frequency Range: 22 Hz to 27 kHz
  • EQ Boost/Cut Range : Maximum 20 dB boost or cut
  • Nominal Q range: 1.5 to 3 (uniquely active in shelf modes)
  • Maximum Input Level: +21dBu
  • Maximum Output Level (1kHz sine, 1% THD+N, BW 22Hz-22kHz, Load 100kOhms): +35dBu
  • Frequency Response (@ +4dBu, Load 100kOhms): -0.1 dB @ 10Hz, -1 dB @ 60 kHz
  • Total Harmonic Distortion (THD+N) (1kHz sine @ +4dBu, BW 22Hz-22kHz): 0.006%
  • Output Headroom (Reference to +4dBu): 31dB
  • Dynamic Range (Reference to Maximum Output): 123 dB
  • Noise Floor Typical (Unity Gain): -88 dBu (A-Weighted)
  • Signal to Noise Ratio (Reference to +4 dBu, BW 22Hz-22kHz): 92dB
  • Input Impedance: 20kOhm
  • Output Impedance: 150 Ohm
  • Tube Complement: 2 x 5751, 4 x 6922
  • Auto-mute warmup delay = 20 seconds
  • Power Consumption (120/240VAC): 44 watts
  • Mains Voltage & Frequency (VAC/Hz): Internal Universal Power Supply 90-254 VAC / 50-60Hz
  • Size (3U): L 19" x W 10" x H 5.25"
  • Unit Weight: 15.5 Lbs.
  • Shipping Box: L 23" x W 15" x H 10"
  • Shipping Weight: 26 Lbs.
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