ABOUT THE MPX 550
Thank you for purchasing the MPX 550 Dual Channel Processor, featuring Lexicon’s proprietary Lexichip®.
The MPX 550 is a true stereo, dual-channel processor with 24-bit internal processing, analog-to-digital conversion, and digital-to-analog conversion. It offers 255 presets with classic Lexicon reverb, including Tremolo, Rotary, Chorus, Flange, Pitch, Detune, 5.5 second Delay, Echo, and Compression. Dual-channel processing creates two independent effects in Dual Stereo (Parallel), Cascade, Mono Split, and Dual Mono combinations.
A large, graphic front panel display provides at-a-glance viewing of program and system status. Programs are organized into 28 banks, with 27 for presets and 1 for user programs. The PROGRAM knob scrolls through all stored programs, or between banks for faster selection. Each program includes up to 20 adjustable parameters, which are organized into “Edit Pages" that consist of four parameters each. The Edit Pages button cycles through available Edit Pages for the selected program.
The editing process is further simplified with dedicated EDIT knobs that correspond to displayed parameters, as well as a special "Adjust" parameter for each program that facilitates quick changes to the most critical aspect of the sound. In many cases, this custom parameter controls several program parameters at once. For instance, it controls the liveness of space in many Chamber and Room programs by changing Decay, Early Reflections, and EQ simultaneously.
Tap Tempo simplifies the once-complicated process of matching the delay times and modulation rates of tempo-based programs to the music. Tempo-controlled delays and modulation rates lock to tempo. In addition, Tap Tempo can be controlled using the front panel Tap/Cancel button, audio input, a dual footswitch, or an external MIDI controller that utilizes MIDI Continuous Controller or Program Change messages.
The MPX 550 features Learn Mode, a powerful editing tool that allows MIDI patching of all parameters, as well as the Bypass and Tap/Cancel buttons. Standard Continuous Controller and Program Change messages provide complete control of these functions.
