SMP-500 A version of our well-known SMP-2 microphone preamplifier, the Forssell SMP-500 has been adapted to work with the API 500 series enclosures. This extremely high-quality, sonically neutral microphone preamplifier is designed for the most demanding applications. SMP-500 circuitry features an all Class A discrete JFET front-end with a gain range of +8 to +64 [...]