Selling my Manley Massive Passive Mastering Edition stereo equalizer, originally built in September 2010 and professionally upgraded by Manley Labs with the 2020 Manley Power switch-mode power supply and illuminated push-button switches.

This is the highly sought-after Mastering Edition, with tighter stepped controls for precise recall and stereo matching. The 2020 PSU upgrade brings:

• Lower noise floor
• Improved reliability
• Lighter weight
• Instant-on operation
• Striking illuminated controls

Condition: Mint - basically brand new. Hardly used, lived in a smoke-free mastering room. You can contact me if you’d like me to run something new through it - I’ll also send video proof confirming the unit is working perfectly.

Includes:

• Original power cable & Box.
• Documentation from upgrade
• Will be shipped in secure, professional packaging.

If you’re looking for that signature Manley tone - open, musical, and effortlessly smooth - this is it. And with the modern PSU upgrade, you get the best performance Manley offers today.