Blackstar HT-20RH MK3 20W Tube Amp Head with IR-Based CabRig Speaker Simulator (Black)spEL84s are at the tonal heart of the Blackstar HT 20RH MK3 20W Tube Amp Head, the team has used decades of valve amp design experience to combine the response and character of this classic British valve with a carefully voiced preamp to create wonderfully lush valve tones. From pure boutique cleans, to mild overdrive that cleans up by backing off the guitar volume control, right up to saturated distortion, this amp does it all. From chiming boutique