API 225L
Product Description
The new API 225L Compressor's superb sound makes it ideal for all studio, live sound and Broadcast applications. Virtually any type of material can be dynamically controlled by the 225L without the annoying side effects. Both "feed forward" (FD-F) and "feed back" (FD-B) gain reduction methods are selectable on the front panel, providing a choice of "that old way", or "the new way". In addition, there is a "HARD" or "SOFT" selector for an "over-easy" type compression resulting in a very natural, uncompressed sound or a typical sharp knee type that lends itself to a much more limiting effect. The "old way" or Feed-Back method is what most of the classic compressors used for the gain control circuit. The "new way" gain reduction is more typical of the newer VCA type compressors that rely on RMS detectors for the gain control voltage.
The Threshold control sets the initial operating parameter. Full range of operation is achieved with signal input levels from -10 dBm to +20 dBm and output capability is +28 dBu through an integral output transformer. The output level remains constant regardless of the threshold or ratio control, much like the "more/less" function on the API 525 compressor.
Release time can be selected by rotating the REL knob. Release time constants: 50m/sec to 3/sec. Attack time is switch selectable at 2m/sec (F), 18m/sec (M) or 75m/sec (N).
The Model 225L is designed for individual channel use or, through the use of the external link function, two units can be combined for Stereo applications via a rear access pin.
The 225L is very flexible in the way it compresses through the use of the SOFT/HARD switch, and the FEEDFORWARD/FEEDBACK switch.
The 225L Compressor/Limiter makes use of the 2520 and 2510 Op-amps and, therefore, exhibits the reliability, long life and uniformity which are characteristic of these devices.
Specifications: Input Impedance: >10 K, Balanced Output Impedance: 85 ohms, Transformer Coupled, Balanced Operating levels: -10 dBm to +20 dBm Maximum gain: 25 dB internally, Unity throughout Noise: 98 dB Below +10 dBm Output, Unweighted, 20-20KHz Frequency Response: 0, -.3, 30 to 20KHz THD+N: .02% (+4 dB @ 2KHz), .01% (+15 dB @ 2KHz), .05% (-15 dB @ 2KHz) Power Requirements: +/- 16 VDC, 100 mA max @ +24 dBm
The Threshold control sets the initial operating parameter. Full range of operation is achieved with signal input levels from -10 dBm to +20 dBm and output capability is +28 dBu through an integral output transformer. The output level remains constant regardless of the threshold or ratio control, much like the "more/less" function on the API 525 compressor.
Release time can be selected by rotating the REL knob. Release time constants: 50m/sec to 3/sec. Attack time is switch selectable at 2m/sec (F), 18m/sec (M) or 75m/sec (N).
The Model 225L is designed for individual channel use or, through the use of the external link function, two units can be combined for Stereo applications via a rear access pin.
The 225L is very flexible in the way it compresses through the use of the SOFT/HARD switch, and the FEEDFORWARD/FEEDBACK switch.
The 225L Compressor/Limiter makes use of the 2520 and 2510 Op-amps and, therefore, exhibits the reliability, long life and uniformity which are characteristic of these devices.
Specifications: Input Impedance: >10 K, Balanced Output Impedance: 85 ohms, Transformer Coupled, Balanced Operating levels: -10 dBm to +20 dBm Maximum gain: 25 dB internally, Unity throughout Noise: 98 dB Below +10 dBm Output, Unweighted, 20-20KHz Frequency Response: 0, -.3, 30 to 20KHz THD+N: .02% (+4 dB @ 2KHz), .01% (+15 dB @ 2KHz), .05% (-15 dB @ 2KHz) Power Requirements: +/- 16 VDC, 100 mA max @ +24 dBm
