Chandler Limited Little Devil EQ
Chandler Limited EMI TG12345 MKIV EQ
dbx 530 Parametric Equalizer
dbx 510 Subharmonic Synthesizer
EMPIRICAL LABS ELRX-H DocDerr (Horizontal Version)
Empirical Labs ELRX-V DocDerr
elysia xfilter 500 Class-A Stereo 4-Band EQ
Fredenstein Artistic EQ Three Band Eq for 500 Series
Fredenstein F603B 500 Series Low-Q Equalizer Module
Fredenstein F610 Universal Entzerrer UE-1
Neve 1073LBEQ Mono EQ Module
Purple Audio ODD Inductor Based EQ
Rupert Neve Designs 551 Inductor EQ
Tonelux EQ5P Discrete Parametric 500 Series Equalizer
Trident Hi-Lo 500 Series Tracking Filter
Trident A-Range 500 Series 4-Band EQ
Trident 80B EQ 500 Series 4-Band EQ
WesAudio Hyperion 500 Series Stereo Analog Equalizer with Digital Recall
WesAudio _PROMETHEUS 500 Series Passive Equalizer with Digital Recall