Mercenary Audio - API 225L Compressor/Limiter 200 Series Module

The gem and the jewel of the 200 series modules!! This little critter is more along the lines of a mono channel from the venerable 2500 rack-mount buss compressor. It has the facilities to be varied from "soft" or "hard" knee functions and "old" sounding to "new" and aggressive. It will give you the availability to take the signal from a whisper to a scream and any place in between you may desire.

API 225L features

The API 225L Compressor is ideal for all studio, live sound and broadcast applications. Regardless of the threshold or ratio settings, the output level always remains at unity. This unique feature allows real-time adjustments without changing the output level. Both "feed forward" (new) and "feed back" (old) gain reduction methods are selectable on the front panel. There also is a SOFT or HARD selector for either an "over easy" compression resulting in a very natural, uncompressed sound or a typical sharp knee type that has a much more severe limiting effect. The 225L is designed for individual channel use or two units can be combined for Stereo applications via a rear access pin. The 225L also has a side chain input for the detector amplifier.

Threshold control from -20 to +10 dBu
Variable Compression Ratio from 0 to Infinity
Adjustable Release Time from 50m/sec to 3 sec.
OLD or NEW Sound
HARD or SOFT Compression Knee
Uses the API 2510 and API 2520 Op-Amps
Transformer Output, to +28dBu

SPECIFICATIONS

Threshold Range: -20dbu to +10 dBu
Compression Ratio Range: 0 to Infinity
Release Time: 50 m/sec to 3 sec.
Input Impedance: >40K Ohms, Balanced
Output Impedance: 85 Ohms, Transformer coupled, Balanced
Nominal Levels: -10 dBu to +20 dBu
Clipping Level: +28 dBu
Frequency Response: 0, -.3, 30 to 20kHz
Noise: 98 dB below +10 dBu output, unweighted. 20-20 kHz
Distortion: THD: .02% (+4 dB @ 2KHz), .01% (+15 dB @ 2KHz), .05% (-15 dB @ 2KHz)
Connectors: .100 spaced ELCO
Power Consumption: 16 VDC, 100 mA max @ +24 dBu

RACK FRAME AND POWER SUPPLY OPTIONS

API L200 12 slot rack (requires API 200PS Power Supply)

MANUALS & PDFs

API 225 Product Info Adobe pdf

API 225 Recall Sheet Adobe pdf

How do I link two Model 225L units to be combined for Stereo in the API L200R 12 slot 200 Series Rack? Their info states the Link function is available in the 200H rack, but is not yet in the L200 Rack, and to contact the factory about how to implement Link in the L200. Should I consider purchasing multiple 200H racks instead? Is there a benefit to either? Seems more economical to get 12 spaces in a rack if I can link the modules in stereo.

According to API there are two ways you could do it. With the first option you would need to pull the rack apart so you could get access to the pins on the PCB. You would need to connect pin 27 to pin 27 on the slots that you wanted linked. If you wanted the ability to link/de-link the slots you would need to install a switch so you could break the connection of these pins.

The second option is to connect the pins of the modules themselves. This again is pin 27. You could still install a switch, but you would need to feed the wire connecting the pins out of the rack so you would have access to the switch.

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