Named in memory of the late, great John Entwistle (whose live solos during the Who song \"5:15\" made many a jaw drop), the Five Fifteen combo pumps out 100w of power through a 15\" BlueLine speaker. Adjust your tone quickly and easily with the bass, mid, and treble controls. Give your sound a quick boost with the pre-shaped Deep switch. Headphone output allows for silent practice. External speaker jack.