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Manley Massive Passive Mastering Version , $8,399.00 - Add to Cart Skip to Product Information

Manley Massive Passive Mastering Version

Stereo Tube 4-band Mastering Equalizer
Manley Massive Passive Mastering Version
Manley Massive Passive Mastering Version

We Can Get It Fast!

While this isn't an item we normally stock, we can still get it to you as fast as possible due to our great relationship with Manley. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated September 7, 2026

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Manley Massive Passive Mastering Version
We Can Get It Fast!

While this isn't an item we normally stock, we can still get it to you as fast as possible due to our great relationship with Manley. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated September 7, 2026

A Mastering Version of the Acclaimed Massive Passive!

This article was Written By

Our Product Research Team

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The Manley Massive Passive Mastering Version equalizer features a simple, passive design - not a standard parametric design - for more natural, organic shaping. It also offers mechanically detented knobs for both Gain and Bandwidth controls, so you can easily repeat your settings. On the Massive Passive Mastering Version, both the Gain and Bandwidth controls intentionally interact, and the bands interact, as well — this creates an incredible-sounding result without sounding "colored" or "processed." Also, both higher and lower than the normal version, the Manley Massive Passive Mastering Version's filters are tailored to mastering purposes.

Premium design with passive components

As you can expect from Manley, no corners were cut with the design of the Massive Passive Mastering Version, and there's no unnecessarily complicated circuit — Massive Passive Mastering Version features basic passive components and uses only metal film resistors, film capacitors, and hand-wound inductors to sculpt the sound.

Mechanically detented knobs

Your settings are completely loggable on the Manley Massive Passive Mastering Version. Manley found a way to mechanically detent the Gain and Bandwidth controls, ensuring repeatability — without adding the extra cost and space problems that Grayhill switches would have caused.

Gain and Bandwidth controls interact, as do the bands

On the Manley Massive Passive Mastering Version, both Gain and Bandwidth controls intentionally interact, as do the parallel-design bands. You can boost a band 20dB while boosting another band at that frequency for minimal change — on most equalizers, the two bands add — so you boost 40dB into clipping. Due to this interaction, predictable step sizes are unrealistic - but the settings are repeatable when logged — and the interact bands contribute to the Massive Passive Mastering Version's excellent sound.

Specially tweaked for mastering

Here at Sweetwater, we've found the Manley Massive Passive Mastering Version is perfectly tailored to mastering needs. Its filters are both higher and lower than the regular Massive Passive. In addition, the Master Gain Trim Controls are true 11-position, 1/2dB, stepped Grayhill switches ranging between -2.5 to +2.5dB of trim, making left/right matching and calibration easier.

Manley Massive Passive Mastering Version Features:

  • 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)
  • 44 Frequencies (roughly 1/4 octave spacing)
  • Frequency Range: 22 Hz to 27 Khz
  • EQ Boost/Cut Range : Maximum 11dB boost or 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 12AU7, 4 x 6414
  • Power Consumption (120/240VAC): 72 watts
  • Mains Voltage Frequency: 50~ 60Hz
  • Size (3U): 19 inches x 5.25 inches x 10 inches
  • Weight: Unit 21 lbs.

Warranty Info

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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.