Chandler is an American company, based in Iowa, which builds mic preamps and related products. Now you might be thinking 'So what? There are hundreds of companies making mic preamps.' However, there are relatively few companies building accurate vintage designs, and even fewer making units based on vintage transistor designs — and most of those are Neve replicas anyway.
Chandler are a little bit different because they specialise in creating a range of vintage preamps, compressors and EQs based entirely on authentic British EMI circuit designs dating back to the late 1960s. These were used in the first of EMI's transistorised consoles — the TG series — which throughout the '70s and '80s recorded such well-known acts as the Beatles and Pink Floyd at the world-famous Abbey Road Studios in London. But Chandler also go beyond simply using the same circuit designs — they also use the same custom-wound transformers (or as close as it is possible to get), the same hand-wired construction practices, and all-discrete circuitry.