Check the listing for details. Crown PIP AMCb Input Card Programmable Crossover, Equilization & Compressor. Condition: Used. Listed at 69.95 USD. The P.I.P.–AMCb is a versatile monophonic Acoustic Modeling Crossover (version b) that plugs into any PIP capable Crown amplifier. It combines the functions of a crossover, equalizer and compressor. DIP switches, plug-in SIP resistors and convenient jumper blocks make it easy to configure any of its powerful operating features. ❏ Variable 6-dB/octave high frequency shelving network with variable 12-dB/octave high-frequency low-pass filter for constant-directivity horn equalization. ❏ Variable threshold, feedback/error-driven compressor/limiter with infinite compression ratio. ❏ Configurable compressor control path. ❏ Fully configurable outputs to supply the amplifier channels. ❏ Configurable “daisy chain” output. ❏ 3-pin balanced XLR connectors for input and daisy chain output.