Iridium 500 - Inductor EQ
Carbon 500 - Classic EQ
Barium Solo - 500 series Reference Meter
Barium Duo - 500 series Reference Meter
Silicon 500 - Solid State Mic Preamp
Lead 500 - Headphone Amplifier
Zinc 500 - Instrument Amplifier
Iron 500 - Transformer Mic Preamp
Helium 500 - Hybrid EQ
