Replacing the original FX80, the DOD Compressor Sustainer FX80B was introduced to the DOD line in 1985. A third knob to control how quickly the compressor went into effect was added in the FX80B for added dynamic control, being labeled Attack between 1985 and 1987 and Release from 1987 onward. Get tighter, more sustained sound for a great, musician-friendly price with the DOD Compression Sustainer FX80B.