The EQP501 is a passive equalizer based on the classic PULTEC EQP 1A, adapted to the '500' format of API*.

The CP4500 is a Stereo bus compressor based on the design that was originally used in a legendary British console, adapted to the 500 series format of API*. It is famous for adding punch and glue to the mixes.

The DI503J is a triple mode Direct Box for instrument and a Re-Amp unit for the '500' format of API*.

The CP554 is a transformer coupled diode bridge compressor based on the design of legendary British consoles, adapted to the 500 series format.

The AB528 is a transformers coupled, class A mic preamp. The design, from the late 60's, is inspired by a legendary console, that was used at the most famous London studio by the greatest artists, such as the Beatles or Pink Floyd.

The PAD500 is a dual balanced line attenuator. It is used after a mic preamp or any effect that you want to drive hot without clipping your converters.

The MU524 is a Variable Mu tube compressor which, with the help of two transformers, provides a smooth and vintage sounding soft knee compression.

The REM624 is a remote control unit for the MC624 Monitor Controler.

It offers the same contols as the central unit (except headphones volume).

The SK49 is a large diaphragm condenser tube microphone. The design was inspired by the legendary Neumann M49 with the addition of intermediary patterns and a switchable high pass filter.

The SK49 sounds fantastic, warm and clear on all sources.

True Grit is a tube saturation processor that allows for very soft and progressive saturation up to full overdrive.

The EQ250 is a 5 bands stereo parametric equalizer inspired by the revered Sontec MEP-250A, adapted to the 500 series format.

The EQ531T is a 3 bands tube equalizer plus High pass filter, built around a dual triode, adapted to the 500 series of API*.