Very clean used example of this unit, with rack ears. Double 1/4" phone jack inputs and outputs on faceplate; XLR in/out on rear panel. Great for doing surgical equalization.
Filter settings:
40, 55, 70, 85, 100, 200 Hz
5, 7, 8.5, 10, 12.5, 15 kHz
Premium VK serviced, 1 year warranty.
Original Manufacturers Description
550-ARecording Filter is a variable high pass and low pass filter with excellent band restriction over the important ranges required by modern film and disc recording, broadcast and sound reproduction. The 550-A has independent controls for both high and low frequencies, each with six positions. Separate on/off controls are provided for both high and low frequencies. Standard double jacks are furnished on the front panel for input and output connections, or permanent connections may be made to a barrier strip on the rear of the unit.
