The Manley Massive Passive EQ is a perfect example of recognizing that the old way of doing something was the best way. The passive circuitry by which they accomplish the EQ is made up of very stable components. Since they are not active (containing neither tubes or transistors) they generate no noise and generate less phase problems than active EQ. Manley has added a tube amplification section to then build the gain back to its original level (+4) The unit is stereo and each channel has low pass filters which can be set at 18kHz, 12kHz, 9kHz, 7.5kHz, & 6kHz, high pass filters that are switchable from 22Hz, 39Hz, 68Hz, 120Hz, & 220Hz, 4 EQ bands can be set to either shelf or bell curves, boost or cut, a gain control, bandwidth contol, frequency control and an in/out switch. The Massive Passive has both balanced (XLR) input and output plugs as well as phone jacks which are set at the factory to unbalanced +4. There are provisions internally to change those plugs to -10 and for reversing the phase. The...

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