We all know the API brand from the 1970s classic consoles, Lunchbox series processors, Legacy, Vision and 1608 desks. It's safe to say that API has a reputation for building recording consoles and outboard equipment that deliver a recognizable thick, warm analog sound. It is an "expensive" sound that, for a long time, was financially out of reach for most. While the Lunchbox made it possible to get "that" API sound, it was still a long reach to a full API console. With the introduction of THE BOX, API has landed in the mid-ground, finally manufacturing an affordable, small-footprint console. API's patented Thrust circuitry has also been added to THE BOX 527 compressor design. Thrust inserts a highpass filter into the compressor's detector, reducing the low frequencies that pump and giving you a punchier sound. This is a very smooth and transparent compressor. It's great for tracking and lovely and soft on full mixes. Personally, I'd have liked to see a faster release control à la the 2500 to give you more punch for more aggressive work. API has created a truly amazing piece of equipment. Overall, 1 am blown away by this well-engineered sonic beauty and its value for the money. If you were to buy four API pre's, two 550a's, two more API 500 Series modules, an API stereo compressor, a monitor controller and a couple of fader packs, you'd end up paying a lot more!
Maebe, Wes (2013) Tech Reviews: API the Box. In: Mix, Vol. 37, No. 11, pp. 68-71. Available at https://openmusiclibrary.org/article/1021739/.