Line 6 FM4 Filter/Synth Modeler Multi-Effects Pedal

The Line 6 FM4 Filter Modeler is a proper filter and synth workstation for guitar and bass, packing 16 models with 24-bit processing plus four footswitchable, programmable presets. With stereo I/O and an expression pedal input, it is built for everything from tight auto-wah funk to wild, synthy sweeps and rhythmic filter pulses.

• Effects engine: 16 digital filter and synth models, 24-bit processing.
• Presets: 20 factory presets plus 4 programmable memories on dedicated footswitches (A, B, C, D).
• Controls: Model Select plus 4 parameter knobs (varies by model), with expression control assignable to most parameters (except the model selector).
• Bypass: Relay-based true bypass, plus an optional alternate bypass mode that keeps DSP engaged for buffered runs.
• Connections: Stereo inputs and stereo outputs, plus expression pedal input.
• Power: 4 x C batteries or optional Line 6 AC adaptor, the unit powers on via the left/mono input jack.
• Size and weight (commonly listed): approx 254 mm (W) x 152 mm (D) x 60 mm (H), weight about 1.4 kg (3.1 lb).