Excellent full range dual channel tube parametric EQ in very good condition £300 off, Reduced to £2,900
Manley say :
" 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. Only metal film resistors, film capacitors and hand-wound inductors sculpt the sound, kinda like a Pultec EQ on hyper-steroids. Super-beefy, hugely-high-headroom Manley all-tube make-up gain amplifiers deliver your tunes into the next realm. "Massive".... it's a fitting word for this beast. You'll need to experience this. "
here's a link to the product spec page >MANLEY LABS<
and here's a similar one in action on YouTube