New, in original sealed box.  The ICC (Installation Compensation Circuit) is a two channel, 1/2 rack width, active electronic correction circuit specifically designed for use with the Sound Advance SA2C Invisible Speaker.

Because of the variety of finishing options available for the SA2C, the ICC provides a wide range of post-installation correction and response compensation for any variations in the SA2C's performance caused by surface finish and the specific installation location selected.

The ICC is normally installed between the system pre-amplifier and the power amplifier.  It may also be inserted into the external processor loops available on some equipment.  The ICC inputs and outputs are line level (-10dBV) unbalanced female RCA jacks.

An extensive set of controls allows the installer to precisely tailor the performance of SA2C speakers to counteract the negative effects of specific room surface finish and acoustic conditions for each project.  The ICC provides two inputs, and two sets of outputs (4 total) all gold plated.  One pair of outputs is the ICC processed signal, the other is the direct signal, unprocessed by by any ICC circuitry.  These direct outputs are designed for use with powered subwoofers for the SA2C, or with other loudspeaker systems.