Two channel modeling electric guitar amplifier head with two independent outputs from Yamaha´s THR series with variable 25W/50W/100W power output. The head lets you play both channels at once or independently. THR 100HD houses a large library of classic amplifier sounds in a single portable amp. It´s possible to create your own amp by choosing from five classic amp models and five power tube models for each channel. The feel and sound can further be modified by choosing between Class A or AB circuitry for each channel and changing the speaker response by uploading Impulse Response files through USB. You can also choose from four types of reverb, three types of Booster, four noise gate settings and parallel or serial effects loop. The front panel houses knobs for controlling Gain, Master, switchable Booster and Amp Model selector, 3-band EQ with Bass, Middle and Treble controls, Presence, Reverb and Volume independently for each channel. Power Tube selector, Class, Speaker Impedance and Power controls for each channel are located on the back panel. The amplifier also houses two XLR balanced Line-out outputs and a headphone output and comes with a 5-button footswitch for controlling Channel selection, Reverb, Booster and Effect Loop settings.