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.

Creating natural, organic, acoustic tone can only be done with an equalizer that treats the signal with natural methods. The Massive Passive uses simple passive components and exploits their natural qualities rather than forcing a complex circuit to meet an arbitrary clinical or scientific goal. Manley knows that recording and mastering equalizers are used by artists for artistic goals and we balanced this design with a little more art than science. The Massive Passive is intended both for the most radical EQ sometimes needed for tracking as well as the most subtle shadings for vocals and mastering. It is designed to be a fundamentally different EQ but incorporates the best strengths of Pultecs, choice console EQs, parametrics and graphics. The difference is that the Massive allows twice as much EQ with half the coloration. 

Key features:

• All-Passive tone sculpting circuitry 
• Unique Shelf curves use the "bandwidth" control 
• Overlapping & Interleaved Frequency choices 
• Every band switchable to shelf or bell 
• Vacuum tube make-up gain & line drivers 
• Parallel symmetrical topology 
• Premium components throughout 
• Passive HP & LP Filters plus gain trims