Fortify Your Sound With Holy Grail British Compression Based on legendary vintage British-spec diode bridge compressor/limiter designs, the Heritage Audio HA-609A fortifies your mixes, stems, and tracks with punch, weight, and color. This boutique 2-channel unit features a fully discrete Class A signal path with three Carnhill/St. Ives transformers per channel, in addition to a transformer-coupled '73-style gain circuit for compressor makeup gain. For maximum sonic and operational flexibility, the HA-609A is equipped with special fast settings for both compression and limiting, along with stereo link and dual mono modes.Add warmth, girth, and authority to any sound source As with all Heritage Audio Elite series equipment, the HA-609A is handcrafted at Heritage headquarters in Spain using cutting-edge manufacturing methods and top-shelf components, including rotary switches and precision, stepped potentiometers for accurate recall and channel matching. The Heritage Audio HA-609A is ready to add warmth, girth, and authority to any sound