Afterburner II Architect's Specifications

The enhanced compressor/limiter shall be a dual channel unit in a steel chassis 6 inches (152mm) deep and one rack unit (44mm) high. There shall be a front panel switch to link the channels to track as a stereo pair. As well, there shall be a switch to put the unit into dual band mono mode; in this mode Channel 1 controls shall compress Low frequencies, and Channel 2 controls shall compress High frequencies. The filter shall be 6 dB per octave, phase corrected, with a dividing frequency of 250 Hz, and the unit shall have a summed filter response of ± 0.2dB through the crossover region.

Each channel shall have a 12 segment LED Output level display and a 7 segment LED Gain Reduction display, plus variable controls for Threshold, Ratio and Output Gain. There shall be a switch to toggle the compressor knee between Hard and Soft, with associated LEDs. A further 2 LEDs shall indicate Above or below Threshold status.

Attack and Release times shall be program dependent. Each channel shall also have a hardwire Bypass switch on the front panel, and a switch to control the Enhance circuit. This circuit shall operate in either mode, and shall provide Low frequency enhancement at 50 Hz, and High frequency enhancement at 10 KHz.

The unit shall have electronically Balanced inputs and outputs, on both TRS jack and XLR type connectors, with passive RFI filters and an Input impedance of 20 Kohms (10 Kohms unbalanced). The Input headroom shall be +22dB, with a CMRR of better than 60dB, and the frequency response shall be 20 Hz to 20 KHz, ± 0.2dB. The Output impedance shall be 300 ohms (150 unbalanced), and the maximum Output level shall be +22dB, with a Signal to Noise ratio of -99dB ‘A’ weighted (–93dB unweighted). The Sidechain Insert points shall be TRS jack connectors and have an impedance of 10 Kohms. T.H.D shall be 0.02% @ 0dB, 1 KHz, and the unit shall have a dynamic range of 115dB.

AC Power shall be supplied via a removable mains cable, connecting to an IEC connector with an integral fuse and voltage change switch on the unit’s rear panel.

The compressor/limiter shall be the ARX Afterburner II.