Euphonic Audio I-amp doubler for sale. Amp has 2 various channels with independent volume and eq control for each channel. It is developed to run an electrical bass into channel 1 and an upright bass into channel 2. You could also utilize the 2nd channel for a 2nd electrical or fretless. Great sounding amp. 550 watts @ 4ohms or 350 watts @ 8ohms. 2.5 lbs. Super portable with very strong power.