Amplifiers for electric guitars are more likely than bass amps to have multiple "channels", but some bass amps also have channels. By providing two or more "channels", each with its own gain, equalization and volume knobs, a bassist can preset various settings (e.g., an accompaniment setting for playing a backing part and a solo bass setting for playing a bass solo). In a heavy metal band, a bassist may use a multi-channel amp to have one setting with an aggressive overdrive, while another channel has a "clean" sound for ballads.