Manley Labs Massive Passive Stereo Tube EQ

BH #MAMSMP • MFR #MSMP
Manley Labs
Manley Labs Massive Passive Stereo Tube EQ
Key Features
  • Passive Inductor-Based EQ
  • 4 Bands of Parametric EQ per Channel
  • Switchable Shelf EQ with Bandwidth Shape
  • Hand-Selected Vacuum Tubes
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The Massive Passive from Manley Labs offers two channels of 4-band parametric equalization with additional 5-band high pass and low pass filters. Its design draws from vintage EQs using passive, parallel topology to create a natural and organic tone. Simple circuits with premium-quality components, like metal film resistors, film capacitors, and hand-wound inductors are used for sculpting the sound.
Special Order
Expected availability: 2-4 weeks
$5,599.00
$467/mo. suggested payments.*
with 12 Mos. Promo Financing

Important Notice

  • This item is noncancelable and nonreturnable.
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Manley Labs MSMP Overview

  • 1Description
  • 2Overview
  • 3Center Section for Each Channel
  • 44-Band EQ Per Channel with Each Band Featuring

The Massive Passive from Manley Labs offers two channels of 4-band parametric equalization with additional 5-band high pass and low pass filters. Its design draws from vintage EQs using passive, parallel topology to create a natural and organic tone. Simple circuits with premium-quality components, like metal film resistors, film capacitors, and hand-wound inductors are used for sculpting the sound.

Each of the 4 bands offer Pultec-style controls, each with fixed frequency selections, variable bandwidth, and either 20 dB of boost or cut. This design allows for twice the control resolution over conventional EQs and eliminates the problem of a center detent not guaranteeing a flat response. The parallel topology allows for massive tone shaping without over driving the outputs. For instance, if you were to boost 4 bands at 1 kHz by 20 dB, the output would still only be +20 dB, whereas a conventional "series" EQ would output upwards of +80 dB.

Additional features include individual band bypass and the ability to switch each band from bell curve to shelf. The two left-most bands offer low shelf capabilities, while the right two offer high shelf. The bandwidth knob changes the properties for each of the shelves as well. The unusual "Constant Bandwidth" controls offer unique tone shaping capabilities. In bell mode, they behave like most "Q" controls of a parametric EQ with a wider shape when set fully counterclockwise, and narrower when set fully clockwise.

The shelf modes offer a special function. When the knob is set fully counterclockwise, the curves are similar to most shelf EQs. As you increase the bandwidth clockwise, a gradual bell-shaped dip is introduced as the slope increases, which modifies the overall shelf shape. It's rare to find an analog EQ with adjustable high shelf curves.

The high and low pass filters are individual circuits selected by switch settings, and each has specific slopes catering to their respective frequency range. All the filters are entirely passive and "inserted" between the boost and cut sections. The two "EQ In" push buttons engage the EQ on their respective channels. When bypassed, the EQ section and tubes are bypassed, but audio signals are still passed through the line amplifier and balanced output transformer. The -6 to +4 dB gain trims are intended to help level match between the "Bypass" and "EQ In."

There are no dedicated meters on the Massive Passive, instead bright blue LEDs indicate "EQ In," while red and green LEDs indicate cut and boost engagement respectively. Hand-made in the USA, the unit is housed in a 3U steel chassis with a CNC-machined 1/4" faceplate that is also inlaid with laser-engraved inserts. The Massive Passive ships with an IEC power cable.

Overview

  • 44 selectable frequency bands
  • All-passive tone sculpting circuitry
  • Unique shelf curves use the "bandwidth" control
  • Overlapping and interleaved frequency choices
  • Every band switchable to shelf or bell
  • Vacuum tube make-up gain and line drivers
  • Parallel symmetrical topology
  • Premium components throughout
  • Passive HP and LP filters with unique slopes
  • Gain trim for level match between "Bypass" and "EQ In" modes
  • Auto-mute warm-up delay offers 20 second buffer before passing signal

Center Section for Each Channel

  • EQ In: Bypass for EQ, filter and tube section. Line amp and output transformer are still active in bypass
  • Gain Trim (-6 to +4 dB): For level matching between "EQ In" and "Bypass" modes
  • Low Pass Filter (6-Way Switch): Selects off or 1 of 5 available filters
  • High Pass Filter (6-Way Switch): Selects off or 1 of 5 available filters

4-Band EQ Per Channel with Each Band Featuring

  • 2-Way Toggle Switch (Bell/Shelf): Switches EQ mode
  • 3-Way Toggle Switch (Boost/Out/Cut): Switches boost or cut mode. Out is the band bypass
  • Gain Knob (0 to 20 dB): Sets cut or boost depth
  • Bandwidth Knob: Adjusts the width of the bell curve or shelf shape
  • Frequency Switch (11-Position): Selects a fixed frequency
UPC: 890833000038

Manley Labs MSMP Specs

Input & OutputInputs
2 x XLR transformer balanced and floating
2 x 1/4" TRS balanced and unbalanced
Outputs
2 x XLR transformer balanced and floating
2 x 1/4" TRS balanced and unbalanced
Level RangeLevel: +4 dBu nominal
Internal Switch: -10 dBu
Filter Type (Slope)Filters
High Pass: Off, 22, 39, 68, 120, 220 Hz
Low Pass: 6, 7.5, 9, 12, 18 kHz, OFF
Filter Slope
High Pass Filter Slope (All Frequencies): 18 dB/Octave
Low Pass Filter Slope (6, 7.5, 9 kHz): 18 dB/Octave
Low Pass Filter Slope (12 kHz): 24 dB/Octave
Low Pass Filter Slope (18 kHz): 60 dB/Octave
EQ SectionFrequencies: 44 (roughly 1/4 octave spacing)
Frequency Range: 22 Hz to 27 kHz
EQ Boost/Cut Range: 20 dB
Nominal Q Range: 1.5 to 3 (uniquely active in shelf modes)
Equalizer Control BandsParametric Frequencies
LOW: 22, 33, 47, 68, 100, 150, 220, 330, 470, 680, 1000 Hz
LM: 82, 120, 180, 270, 390, 560, 820, 1200, 1800, 2700, 3900 Hz
HM: 220, 330, 470, 680, 1000, 1500, 2200, 3300, 4700, 6800, 10,000 Hz
HI: 560, 820, 1200, 1800, 2700, 3900, 5600, 8200, 12,000, 16,000, 27,000 Hz
Frequency ResponseFrequency Response: 8 Hz to 60 kHz ±2 dB
Maximum OutputMaximum Output: @ 1.5% THD +37 dBv; +26 dBv @ 20 Hz
THD & NoiseTHD & Noise (1 kHz @ +4 dBu): 0.06%
Noise FloorNoise Floor (referred to +4 dBu): -85 dB
Dynamic Range120 dB
BypassBypass Switch: Bypasses EQ and tube circuits (not hardwire)
Tube Type2 x 12AX7 EH
4 x 6414
Power Supply72 W @ 120 VAC, 60 Hz
Rackmountable3 U
Dimensions (W x H x D)19.0 x 5.3 x 10.0" / 48.3 x 13.3 x 25.4 cm
Weight21.0 lb / 9.5 kg
Packaging Info
Package Weight27.55 lb
Box Dimensions (LxWxH)22.9 x 18.3 x 10.1"
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