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Natural Tone Preservation
The Manley Massive Passive uses passive EQ components, which minimize distortion and maintain the natural quality of the audio, allowing for double the EQ with half the coloration compared to conventional designs.
KEY FEATURES
Manley Massive Passive
The Manley Massive Passive uses passive components for its equalisation and exploits their natural qualities avoiding the distortion inherent to active circuitry. As a result, the Massive Passive can provide twice the amount of EQ with half the colouration of most designs for a truly natural tone.
Unique EQ Design
Incorporating the strengths of Pultec designs, as well as some choice console EQs parametric and graphics, the Massive Passive is nonetheless a truly different EQ. From subtle enhancements to radical sound-shaping this audio equalizer does it all. For example heavy HF boosts will add a lot of presence to vocals without adding sibilance, and LF will add heft without mud.
Unlike most EQ designs, All four bands of the Massive Passive are not built in series but in parallel. This means that overlapping frequencies do not suffer from the cumulative effect of tweaking each band.
As each band works from the exact same source, the result is much more transparent. Each band can be set to bypass, boost or cut as well as a bell or shelf. Each band is capable of 20dB of boost or cut with impressive headroom. Five extremely steep high-pass and low pass filters are also added to remove unwanted frequencies such as low-end rumble. Both HPF and LPF interact with the main parametric EQ section.
New Manley Power
Since the start of 2020 the Massive Passive now includes the new MANLEY POWER Switch-Mode Power Supply.
Designed for Manley by Bruno Putzeys this new power supply provides 300 Volt DC rails to run the valves and 6 Volt lines to power them up providing extra realiabilty and sonic improvements throughout the Massive Passive and other designs.
Manley Massive Passive Specifications:
- 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.
- 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
USER MANUAL
Informational guide on how to use
Informational guide on how to use
RECALL SHEET
Download the recall sheet
Download the recall sheet
- FREE UK delivery for orders above £99
- Same Day Delivery within M25 - £48 (where items are in stock and available)
- £10 for items under £99
- EU Delivery - £36
- Rest of the World Delivery - £80
We reserve the right to charge extra for heavy or large items (e.g., consoles or large studio monitors). If extra shipping costs apply, we will contact you before processing the order. We use UPS and DPD for shipping to and from the UK, Europe, and Worldwide. Same day deliveries within the M25 are also available, depending on stock availability.
If you have specific delivery requirements, please call or email us, and we'll be happy to assist.
At KMR, we provide exceptional support for all your audio studio requirements. Our committed team is ready to help you with setup, troubleshooting, and optimizing your gear for peak performance.
Rest easy with our extensive warranty coverage, featuring a 2-year protection plan on all studio equipment. If you face any challenges, our customer service team is just a phone call away, prepared to offer expert assistance.
KEY FEATURES
Advanced EQ Flexibility
The Massive Passive provides unparalleled flexibility in sound shaping with four parallel EQ bands that can independently bypass, boost, or cut. This configuration prevents frequency overlap issues and maintains clarity, even with significant adjustments.
Enhanced Power and Reliability
Introduced in 2020, the Manley Massive Passive includes the MANLEY POWER Switch-Mode Power Supply, engineered by Bruno Putzeys, providing stable high voltages for improved reliability and sonic quality in the equalizer's performance.
PRODUCT DETAILS
The Massive Passive EQ employs a fully passive, parallel equalisation design inspired by Pultec-style circuitry, utilising hand-wound inductors and premium film capacitors to deliver smooth, natural tonal shaping. Its 44 selectable bands and wide dynamic range let engineers add subtle air or bold character without introducing digital artefacts or unwanted gain.
The shaped signal is driven by dual valve line drivers, imparting warm harmonic richness and smoothness even under heavy EQ settings. Steep passive high-pass and low-pass filters further enable surgical removal of rumble or harshness while keeping the core tonal integrity intact.
Each band features a switchable shelf or bell response, paired with a unique bandwidth control that maintains consistent quality whether boosting or cutting frequencies. This flexible approach allows precise, musical sculpting of the audio spectrum, preserving phase coherence and clarity across the entire range.
PRODUCT VIDEOS
“It’s a perfect combination between modern convenience and the great, classic, sweet EQs that I love, like the Pultecs. It’s probably – no, almost definitely the best analogue EQ in existence.”