| SPL |
|---|
 | TDx Transient Designer module |
| SPL |
|---|
 | DeS Dual Band De-Esser |
| Rupert Neve Designs |
|---|
 | Portico 535 Diode bridge compressor |
| Rupert Neve Designs |
|---|
 | Portico 543 500 Series Compressor |
| Rupert Neve Designs |
|---|
 | Portico 542 500 Series Tape Emulator |
| Rupert Neve Designs |
|---|
 | Portico II Master Buss Processor Mastering Compressor / Limiter / SFE |
| Lindell Audio |
|---|
 | RE-76X 1176 compressor for the 500 series format |
| TK Audio |
|---|
 | TK-lizer 500 series dual mono EQ |
| Rupert Neve Designs |
|---|
 | Portico 551 500 Series Inductor EQ |
| A-Designs |
|---|
 | EM-PEQ Pultec-style equalizer |
| Chameleon Labs |
|---|
 | 560EQ 500-series Microphone Preamplifier |
| Lindell Audio |
|---|
 | PEQ-501A classic American EQP1 program equalizer |
| A-Designs |
|---|
 | EM- Blue preamp |
| A-Designs |
|---|
 | EM-Gold preamp |
| A-Designs |
|---|
 | EM-Red preamp |
| A-Designs |
|---|
 | EM-Silver preamp |
| A-Designs |
|---|
 | P-1 preamp |
| Grace Design |
|---|
 | M501 Microphone preamplifier |
| Maag Audio |
|---|
 | PREQ4 1- channel microphone preamplifier with air band® |
| Phoenix Audio |
|---|
 | DRS 1R Mono Class A Microphone Pre-Amplifier/DI |
| TK Audio |
|---|
 | SP501 500-series Class A preamp |
| Rupert Neve Designs |
|---|
 | Portico 511 Mic Preamp met Vari-Silk en HP filter |
| Schertler |
|---|
 | Yellow MIC500-TL pre amp transformerless |
| Schertler |
|---|
 | Yellow MIC500-TO pre amp transformer out |
| Schertler |
|---|
 | Yellow MIC500-TT pre amp transformer in/out |
| Chameleon Labs |
|---|
 | 581 500-series Microphone Preamplifier |
| Chameleon Labs |
|---|
 | 581 IMOD 500-series Microphone Preamplifier |
| Earthworks |
|---|
 | ZDT 521 500 Series Zero Distortion Technology™ Preamplifier |
| Lindell Audio |
|---|
 | RE-51 preamp and EQ module for the 500-series |
| Radial Engineering |
|---|
 | Powerhouse 500 series rack |
| Radial Engineering |
|---|
 | WorkhorseWR8 500 series rack |
| Rupert Neve Designs |
|---|
 | R6 500 series rack |
| Rupert Neve Designs |
|---|
 | R10 500 series rack |
| Rupert Neve Designs |
|---|
 | 510 blank panel blank panel |
| Chameleon Labs |
|---|
 | 880RACK 8-slot 500 Series Powered Rack System |
| Chameleon Labs |
|---|
 | CPS503 Modular 500-Series Power System |
| Black Lion |
|---|
 | PBR-8 500 Series Rack 500 series rack |
| Lindell Audio |
|---|
 | 503 Power MK2 3-slot 500 Series Power Supply |
| Lindell Audio |
|---|
 | 506 Power MK2 6-slot 500 Series Power Supply |
