500 Series Equalizers & Filters

Introducing the Vacbax tube equalizer module.Buttery smooth Baxandall style tone control in a fully compliant all-tube 500-series module.

The B15 is a unique gyratory circuit with a transformer balanced input and output.Sonically, it provides a sonic texture between the punchier sound of 312 and colored sound of 1073, while providing...

CHANDLER LIMITED furiously enters the 500 race with its new line of 500 Series Modules for your favorite lunch box! Using all discrete circuits that combine Chandler’s best designs with the hottest...

A two-band program EQ with stepped controls. Designed to work in standard “500″ racks. The LILPEQr emulates the colorful 3D richness and useful responses of our favorite vintage tube (aka valve)...

The 1073D (Deluxe) is essentially a 1073 module with extra high frequencies and a direct input for the 500 series market. Built using the same exact parts as the 10 series module, the 1073D features...

One of the newer members of the Empirical Labs family is the DocDerr, a 500 series multi-purpose tone enhancement module that houses six different sections of digitally controlled analog processing. ...

The 73EQ JR is a fully featured Line Input module for the 500 Series. It not only shares the 3-band Equalizer with his big brother, the 1073, but also shares the same transformer coupled line preamp...

The 551 Inductor EQ is the only equalizer for the 500 Series actually designed by Rupert Neve. Featuring 3 bands of EQ inspired by Mr. Neve’s most prized vintage designs, along with custom-wound...

The E27 was created for the need of a high quality modular equalizer. High performance, versatility, ease of use, and simplicity is the initial core of the E27's design. Some of the best analog gear...

The Series 80B 500 Series EQ incorporates a classic four band equaliser which is identicalto that employed in the Trident Series 80 console. It consists of frequency switchable high and low pass...

The EQ5P is a DISCRETE Parametric Equalizer with some very unique features.  Notice that the panel has no Q control.  The filter Q control is in relation to the Boost and Cut control, and uses a...

E-Series EQ Module for API 500 format racks The E-Series EQ Module for 500 Series racks reproduces the legendary sonic signature of an early 80's classic, the Solid State Logic SL 4000 E console...