65R GUITAR AMPLIFIER 65 Watt E-WAVE Spring Reverb Amp 12" Woofer Speaker INPUT - 1/4" instrument cables MONO NORMAL CHANNEL VOLUME - adjusts the loudness of the normal(clean)channel. NORMAL CHANNEL INDICATOR - Lights up when the Normal Channel is active. NORMAL TREBLE - Adjusts the HIGH Frequency of the normal channel. NORMAL BASS - Adjusts the LOW Frequency of the normal channel.