Distortion (Dual-Channel Preamp / Distortion)
The ISP Technologies Empyrean is a hybrid dual-Channel Preamp / Distortion pedal based on the Dual preamp (Distortion + Clean) with Decimator X G String NR, with Per channel: Gain, Bass, swept Midrange (300Hz-3kHz), Treble; footswitchable Volume Boost controls, made in USA.
| Category | Distortion (Dual-Channel Preamp / Distortion) |
| Circuit / based on | Dual preamp (Distortion + Clean) with Decimator X G String NR |
| Signal | Hybrid |
| Controls | Per channel: Gain, Bass, swept Midrange (300Hz-3kHz), Treble; footswitchable Volume Boost |
| Switches | Distortion-channel filters: 300Hz high-pass, 3kHz low-pass |
| I/O | guitar in, out, effects loop send/return |
| Power | 9V AC (internally multiplied to +/-15V rails) |
| Country of manufacture | USA |