JOYO Acoustic Guitar Neck (4334187982) The Extreme Metal provides a strong low frequency and clear, transparent high frequency, and penetrating main rhythm Tone. With a powerfully-adjustable 3 band EQ and sweep Mid-Freq knob. Play the rhythms and then use the boost switch to play leads that cut through the mix! 6 Controls for complete sound manipulation. Aluminum alloy casing with stoving varnish finish.