API Audio is deserved of the much overused title 'Legend'. Saul Walker, the founder of API Audio in the late sixties, is up there with Rupert Neve, Dave Hill and George Massenburg as true pioneers of world-class, game-changing audio equipment production.
It was the invention of the 2520 op-amp that made API the audio legend it is today. This little amplifier is still in use today, in all API's designs, and it is what makes API one of the most sought after sounds in audio recording around the world.
API also pioneered the modular format, initially for their Legacy consoles. This is where the 500 series format originated from, and of course nowadays every manufacturer and his dog produce modules for this format. But API invented it, and it all started with their 512c mic-pre, 550A EQ and 525 compressor.
Nothing is like API. A true legend of audio recording. KMR has a long and proud history with this brand, and we continue to stock their entire range.