Heritage Audio 73EQJR 500 Series EQDesigned for 500 series rack enclosures, the Heritage Audio 73EQ JR is a full featured line input module that shares the 3 band equalizer, the transformer coupled line preamplifier, and the Class A transformer balanced output stage of the classic 1073 module. This combination allows the module to capture a full transformer based Class A sound without the need for external preamps. The equalizer section of the module features the same Baxandall type