This pre loved Line 6 FM4 Filter Modeller is a classic, multi-function effects pedal dedicated to synth, filter, and avant-garde modulation tones. Enclosed in a rugged, iconic purple metal chassis, this four-footswitch pedal became famous for housing a massive library of vintage synthesizer, envelope filter, and wah emulations under a single interface. It is in good working condition and includes PSU, manual and a Line 6 EX-1 expression pedal. The cable on the PSU has been wrapped with electrical tape in some areas, but it functions as intended.
An overview of its core models, control interface, and physical specifications includes:
Core Filter and Synth Models
The pedal contains 16 distinct vintage and custom-engineered filter models based on rare effects gear:
- Tron Down and Tron Up: Recreations of the classic Mu-Tron III envelope filter.
- Seeker: An emulation of the Z-Vex Seek Wah, featuring an 8-step rhythmic filter pattern.
- Obi-Wah: A simulation of the Oberheim voltage-controlled sample-and-hold filter.
- Synth String and Synth Monophonic: Emulations of the classic Roland GR700 and ARP Odyssey synthesizers.
- Attack Synth: Based on the rare Korg X911 Guitar Synth.
- Additional Models: Includes Voice Box, V-Mod, Throbber, Spin Cycle, Comet Trails, Purge, Runaway, Sub-Octave Shift, and Octisynth.
Control Interface
- Model Selector Knob: Quickly cycles through the 16 available filter and synth engines.
- Parameter Knobs: Five dedicated control knobs (Freq, Q, Speed, Mode, and Mix) dynamically change functionality depending on the selected model to allow deep, intuitive tweaking.
- Preset Footswitches: Four heavy-duty footswitches allow users to save and instantly recall four completely custom sounds on the fly.
Hardware and Connectivity
- Audio Routing: True stereo input and output jacks allow for wide, panning filter sweeps and dual-signal paths.
- Expression Input: Includes a dedicated jack for an optional Line 6 EX-1 expression pedal, enabling real-time foot control over any parameter combination.
- Power Requirements: Can be powered by four C batteries or an external Line 6 PX-2 AC power adapter.
