I purchased this about a year ago, but I've stored it with almost no use, so I think the condition is good. Also, there's no crackling in the volume, and it's in good working order. ... A standard, home-practice-perfect bass amplifier. It features a simple 3-band EQ, a headphone output, and an AUX input. Furthermore, the volume of the AUX input can be adjusted on the amplifier itself.