Manley Massive Passive Stereo Tube Equalizer


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  • The MASSIVE PASSIVE is a two channel, four band equalizer, with additional high pass and low pass filters. Passive refers to the tone shaping part of this clever new EQ design not using any active circuitry. Only metal film resistors, film capacitors and hand-wound inductors sculpt the sound, kinda like a Pultec EQ on hyper-steroids. Super-beefy, hugely-high-headroom Manley all-tube make-up gain amplifiers deliver your tunes into the next realm.


    • 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
    • HP and LP Filters plus gain trims
  • Ins & Outs

    Balanced XLR & 1/4" (accepts unbalanced)

    Level +4 dBu nominal, internal switches for -10 operation
    Bypass Switch Bypasses EQ & tube circuits (not hardwire)
    EQ 44 Frequencies (roughly 1/4 octave spacing)
    Frequency Range 22 Hz to 27 Khz
    EQ Boost/Cut Range 20 dB boost, 20 dB cut
    Nominal Q range 1.5 to 3 (uniquely active in shelf modes)
    Frequency Response ±2 dB: 8 Hz to 60 KHz
    Maximum Output @ 1.5% THD +37 dBv; +26dBv @ 20 Hz
    THD & Noise (1KHz @ +4 dBu) 0.06%
    Noise Floor (referred to +4dBu) -85 dB (A Weight)
    Dynamic Range 120 dB
    Tube Complement 2 x 12AX7 EH, 4 x 6414
    Power Consumption (120/240VAC) 72 watts. Unit is factory set for 100V, 120V or 220-240VAC operation for original destination country's mains voltage
    Operating Mains Voltage Changeable with power transformer changeover switch and fuse value change.
    Mains Voltage Frequency 50~ 60Hz
    Size (3U) 19" x 5.25" x 10"
    Weight Unit 21 lbs. Shipping Weight: 27 lbs.
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