The EQSM1 features a first-order, 50Hz high pass filter that has a very gradual slope, perfect for removing unwanted low frequency content. The high and low shelves are set at specific, effective frequencies and become quite dramatic with large boosts or cuts. The EQSM1's continuously variable mid bands have a wide bandwidth and slightly overlapping frequencies. This gives users the ability to go from gentle to extreme shaping with ease. In addition, a true bypass “In” switch, allows for accurate comparison between the original signal and the equalized signal. Based on the popular "500" series format, the EQSM1 is compatible with any rack manufactured using this format.