In order to complete the Elements Bronze mic preamp design and make best use of their LA-3A transformers, Hairball Audio needed an op amp in popular 2520/990 footprint which would imitate the unique sonic signature of an LA-3A makeup gain amplifier section, and so Eisen Audio was recruited once again. Raindog is what we call the result, which makes strategic use of a hybrid surface mount approach (some components sound better in SMT and others do not) while including an inductor and electrolytic capacitor in a unique bias arrangement.