Manley Massive Passive 2-channel, 4-band Vacuum Tube Equalizer

Manley Massive Passive 2-channel, 4-band Vacuum Tube Equalizer

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Manley Massive Passive is a 2-channel, 4-band Vacuum Tube Equalizer, featuring a passive tone-shaping portion of the equalizer design and using only the best components, for its ultimately huge, high-headroom performance. The Massive Passive is packed with five highpass filters and four lowpass filters, and you can bypass either or both. The filters are steep, so you can pull out the junk without touching the real music. It’s also great-sounding when combined with other bands. Ultimately, Manley went for “what’s useful” when designing the Massive Passive, not “what’s standard” – it’s a welcome design departure that produces seriously massive results.


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 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)

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 for serial MSMPX### after 2/2004

Tube Complement: 2 x 5751, 4 x 6414 for serial MSMP### until 2/2004

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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