The JOYO FireBrand 2 channel guitar amp head blends valve and solid state guitar amplifier technology, resulting in a tiny guitar amplifier head that can produce a crisp clean channel and an immense wall of hot distortion sound on the other. The JOYO Bantamp series are arguably the most feature rich & versatile mini amp heads available at this price. The FireBrand has a 1 x 12AX7 Preamp tube - The ability to reproduce the sound of the instrument was a key factor in assessing a tube for the JOYO Bantamp series. The 12AX7 pre amp tube produces the warm smooth overdrive tones that do not clip tone as a typical fixed state amp head would. The Tube Pre amp has the sonic focus of phattening tone stages and keeps your guitar sounding true to its original tone.