Add a massive sound to your bass rig with the Orange OB1-500 bass amplifier head. Orange took the popular bi-amp system, using both bass and guitar amps for a wide range of tone and cool overdrive tones, and shoehorned it into a single 2U, rackmountable unit. The OB1-500 sports a 3-band Baxandall EQ so you can dial in the perfect low-end tone. Gain and blend controls let you add overdrive to your sound and mix it with your original signal. Create a monstrous wall of bass tone with the Orange OB1-500 bass amplifier head.