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 U.S.A.

Released in 2021 /

H2 Audio 0011 Mic Pre and 3-Band EQ

The H2 Audio 0011 Mic Pre and 3-Band EQ is the original channel module from so many iconic studio recordings of the past.

Made In U.S.A.

Released in 2021 /

H2 Audio 5011 Helios 3-Band EQ

The H2 Audio 5011 Helios 3-Band EQ is the EQ section from the 0011 in a 500 Series package.

Made In U.S.A.

Released in 2021 /

H2 Audio 2128 Helios Mic Preamplifier

The H2 Audio 2128 Helios Mic Preamplifier is the mic preamp circuit from the 0011 in a 500 Series package.

Made In Germany

Released in 2022 /

SPL BiG Stereo Image Shaper

The SPL BiG Stereo Image Shaper is a Stereo Image Bigger Maker for 500 Series effects racks.

Made In Sweden

Released in 2022 /

TK Audio BC501-GR Bus Compressor

TK Audio’s best-selling 500-series module, the TK Audio BC501-GR Bus, is a stereo bus compressor that features all the power of TK’s flagship BC1-THD.

Made In U.S.A.

Released in 2022 /

AEA TRP500 Microphone Preamplifier

The AEA TRP500 500-series preamp delivers 85 dB of quiet JFET gain, ultra-high 100 kΩ impedance, and a switchable high-pass filter, optimised for ribbons but exceptional with all microphones.

Made In Sweden

Released in 2022 /

TK Audio T-Komp 500 Comrpessor

The TK Audio T-Komp 500 has a unique design which offers a modern take on the old vari-mu ratio curve. The ratio is progressive and increases with the threshold level.

Made In Sweden

Released in 2022 /

TK Audio TK-Lizer 500 Equaliser

The TK Audio TK-Lizer features all the power of the TK Audio’s flagship TK-Lizer, including the M/S functionality that has made it such a staple in studios all over the world.

Made In Sweden

Released in 2022 /

TK Audio M/S Blender 500 Parallel Processer

The new TK Audio M/S Blender 500 Parallel Processer is a multi-functional parallel processing tool. A dual mono blender, a stereo blender and a M/S encoder/decoder in one.

Made In Poland

Released in 2022 /

WesAudio Phoebe Microphone Preamplifier

The WesAudio Phoebe Microphone Preamplifier is a Class A microphone/line/instrument preamplifier with digital recall, in a compact 500 series chassis.

Made In Switzerland

Released in 2022 /

Weiss A1 Microphone Preamplifier

The Weiss Engineering A1 is a high-fidelity microphone and line preamplifier with Lundahl transformers, a discrete Class A design, and up to 60dB of clean gain. It features a precision digitally controlled de-esser, a -24dB pad, a selectable low-cut filter, and 48V phantom power. Designed for API 500-series racks, it delivers pristine, transparent sound for professional recording applications.

Made In China

Released in 2022 /

Solid State Logic Ultraviolet Stereo Equaliser

Solid State Logic Ultraviolet Stereo Equaliser takes the acclaimed minimum phase-shift Violet stereo EQ section from Fusion and puts it into 500-series format.