Heritage Audio 609A Elite - '609A Stero/Dual Mono Compressor Limiter

The Heritage Audio 609A Elite is a modern adaptation on the classic transformer coupled diode bridge compressor/limiter. The 609A features a fully discrete, class A design with a total of three Carnhill/St Ives transformers per channel. One of the adaptations made to the design is the inclusion of a fast attack mode for both the compressor and limiter meaning the HA-609A has the flexibility to handle individual tracks, groups and 2-Bus program material. The unit uses switches and rotary knobs of high quality that are stepped, allowing for easy recall and maintaining of the stereo image. 

Specifications

• Maximum input level: Over +22 dBu.
• Maximum output level: Over +26.5 dBu into 600 ohms.
• Self-Noise: Less than -75dBu 20Hz-20Khz. -80dBu A-weighted.
• THD+N (50Hz- 20Khz): not engaged, less than 0.07% at +20dBu.
• Frequency response, COMPRESS and LIMIT OUT, +- 0.5dB, 15Hz- 30Khz.
• Input impedance: 10Kohms, transformer balanced and floating.
• Output impedance: Less than 75 ohms, transformer balanced and floating, Class A driven.
• Compressor characteristics: Threshold from –20 to +20 dBu on a 41-step precision potentiometer. Ratio selectable on a rotary switch, 1.5:1, 2:1, 3:1, 4:1, 6:1. Release selectable on a rotary switch, 100, 400, 800, 1500 mS, A1 and A2 auto release times. A1 corresponds to 50mS on peaks and around 500mS on sustained program. A2 to 50mS on peaks and 1.5 seconds on sustained program.
• Limiter characteristics: Limit level selectable from 0 to +20 dBu on a 41-step precision potentiometer. Release selectable on a rotary switch, 50, 100, 200, 800 mS, A1 and A2 auto release times. A1 corresponds to 50mS on peaks and around 800mS on sustained program. A2 to 50mS on peaks and 1.5 seconds on sustained program.