The FM 25 DSP also gives you 15 on-board effects (reverb, delay, tremolo, chorus, flanging and combinations), and an acoustic simulator that offers great acoustic-electric tone. Convenient cool features include an auxiliary input for playing along with CDs, MP3s or other source material, a headphone output for silent practice, independent gain and master controls in the "drive" channel, and an optional one-button channel footswitch (P/N 099-4052-000). The black control panel, chrome hardware and black vinyl covering and grille cloth make for a tough, no-frills appearance.