API 5500 Stereo EQ Designed for recording, mixing and mastering applications, the single rack space API 5500 EQ is a two-channel EQ package with an all-discrete signal path that combines the classic features of the API 550B four-band EQ module with the boost and cut precision of the 550D and the 550M mastering equalizer. Classic API sound Each channel of the API 5500 features four independent bands of equalization - Lo, Lo-mid, Hi-mid and Hi - covering a frequency range from 30Hz to 20kHz. The four EQ bands on each channel operate in conjunction with a range control that offers three choices of boost and cut: the standard API +/-2dB, +/-1dB, and a .+/-0.5dB setting. The self-powered unit is built to API's exacting quality standards in the USA and includes the usual five-year warranty. Specifications : Rear Connectors: XLR & 1/4" TRS Input, XLR Output Input Impedance: 20K Ohms, Balanced Output Impedance: 75 Ohms, Transformer Coupled, Balanced Maximum Input Level: +32 dBu Maximum Output Level: +32 dBu Frequency Response: +/- 1 dB from 20Hz to 30KHz Signal to Noise Ratio: -105 dB Power Requirement: 18 Watts Size: 19" X 1.75" (1U) X 11.25" deep Size (Boxed for Shipping): 23.25" X 6.5" X 16" Actual Weight: 10 lbs. Shipping Weight: 14 lbs. Filter Frequency Centers: LO 30, 40, 50, 100, 200, 300, 400 Hz LO-MID 75, 150, 180, 240, 500, 700, 1K Hz HI-MID 800, 1.5K, 3K, 5K, 8K, 10K, 12.5K Hz HI 2.5K, 5K, 7K, 10K, 12.5K, 15K, 20K Hz Filter Boost/Cut Steps: +/- 2, 4, 6, 9, 12 dB Range Multiplier: x1, x0.5, x0.25