Earlier this year, audio wizard Bob Heil of Heil Sound unveiled a new device for amateur operators -- the
Parametric Receive Audio System. Essentially, it's an audio equalizer that allows you to tailor your receiver's audio output to best fit your hearing's response to the full range of audio frequencies. It's designed to be used with a powered speaker, which provides extra amplification, or through its built-in headphone amplifiers. Bob will introduce you to the system and his goals in developing it.
