The EVH 5150III 15W LBX-S Head Guitar Mini Head Amplifier EVH 5150III 15W LBX-S is a head amplifier that integrates legendary tones into a compact 15W amplifier. Featuring a captivating dark stealth look with LBXI and LBXII hybrid amplifiers, the LBX-S blends green clean channels and red high gain channels for intense modern British sound. Equipped with four JJ ECC83S (12AX7) pre tubes, two JJJ EL84 power tubes, this portable head features dual concentric gain and volume controls for precise and independent control of each channel, and a universal EQ presence and resonance control. The green channel gives you a clear clean tone and a bluegee tone when you raise the gain. The red channel with foot switch accesses gives you intense overdrive tones that look like burning.