500 Series

The 500 Series format introduced modular studio processing within compact rack systems, allowing engineers to combine preamps, equalisers, compressors and other signal processors in interchangeable slots. Originally developed as part of console channel strip designs, the format evolved into a standalone modular ecosystem widely adopted in modern studio production. This archive includes 500 Series modules and compatible rack systems used in professional recording environments. From vintage-inspired recreations to contemporary circuit designs, the 500 Series format provides flexible hardware processing within modular studio workflows.

Made In China

Released in 2020 /

Solid State Logic VHD+ Microphone Preamplifier

The Solid State Logic VHD+ Microphone Preamplifier is a uniquely versatile VHD based preamp technology capable of Ultra-clean to heavy distortion…You decide.

Made In China

Released in 2020 /

Solid State Logic G-Comp

The legendary sound of the SSL Stereo Bus Compressor has been glueing mixes together for 40+ years – introducing the Solid State Logic G-Comp.

Made In U.S.A.

Released in 2020 /

API 312 Microphone Preamplifier

The API 312 Microphone Preamplifier is one of API’s most sought after and famous mic preamps.

Made In Spain

Released in 2020 /

Kahayan Solid 4000 500 Series Mix Bus Processor

The Kahayan Solid 4000 Mix Buss 500 is a 500 series stereo summing module that delivers the iconic SSL 4000 sound with fully discrete circuitry and modern reliability.

Made In U.S.A.

Released in 2020 /

Pultec EQP-500X Equaliser

Pulse Techniques is pleased to offer the Pultec EQP-500X 500-series equaliser, the next generation of our API 2520 gain stage passive equalisers.

Made In U.S.A.

Released in 2020 /

Pultec MEQ-500 Equaliser

Pulse Techniques recently introduced a 500-series version (EQP-500X) of our popular 19″ rack-mount solid-state line amp program equalisers (EQP-1A3-SS & EQP-1S3-SS) equalisers. Based on the venerable API 2520 op-amp followed by a high-quality Triad output transformer, these are preferred by some engineers to the vacuum tube models.

Made In China

Released in 2020 /

Solid State Logic SiX CH Channel Strip

Solid State Logic SiX CH is a single-width 500 Series channel strip using the SuperAnalogue channel processing features from SSL’s SiX console including the Mic-pre, low and high frequency EQ, as well as the single knob compressor.

Made In U.S.A.

Released in 2021 /

API 512v Discrete Mic / Line Pre

The API 512v is a mic / line / instrument preamp, world famous for its ability to provide a low noise (-129 EIN) and unusually good sounding front end for all types of audio applications.

Made In U.S.A.

Released in 2021 /

API 550-DI Direct Input

Like the console-based API 205L, the API 550-DI is specifically designed to accept a guitar, bass or keyboard direct input while minimising any loading effect on Hi-Z instrument pickups.

Made In Poland

Released in 2021 /

WesAudio Rhea Vari-Mu Tube Compressor

The WesAudio Rhea Vari-Mu Tube Compressor is a fully analogue, stereo vari-mu tube compressor with digital recall, in a compact 500 series format.

Made In U.S.A.

Released in 2021 /

API 527A Compressor Limiter

The API 527A Compressor/Limiter takes its place alongside the family of API VCA based compressors, including the 225L compressor and 529, 2500, and 2500+ stereo bus compressors.

Made In China

Released in 2021 /

Solid State Logic E-Dyn Dynamics Module

The Solid State Logic E-Dyn Dynamics Module is an E-Series Dynamics Module providing Classic SSL analogue processing in 500-Series format.