500 Series Equalizers & Filters

The Cranesong Insigna is a 500-series module tube EQ designed by Dave Hill and comes from a long line of industry standard, high quality audio hardware. The unit is based around a dual triode circuit with a 12AX7 tube, featuring 2 shelving EQs, a...

Wunder Audio Allotrope EQ The Wunder Audio Alloptrope EQ is a classic inductor-based baxandall equalizer with has the same EQ circuit as the Wunder Audio PEQ2. All aspects of this design from the metalwork to the components in the circuit are made to...

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 necessary musical equalization to your record path.Pair...

The 32EQ Harrison Consoles and Great River Electronics are proud to announce a new product collaboration – the 32EQ.The 32EQ is a new 500-series version of the EQ and filters from the renowned Harrison 32 Series consoles. The 32EQ incorporates the...

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.  With over two years of meticulous development and...

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 and Class A transformer balanced output stage. These...

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 inductors, transformers and class-A gain blocks, the...

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 from the past was the inspiration for its character in...

A ten-band inductor-based graphic EQ. Designed to work in standard “500″ racks. An illuminated pushbutton for relay true bypass (green) allows for easy comparison with unprocessed source material. A Tricolor LED meters the signal. The...

A modern update of the classic “swinging inputs” console EQ, with four easy to use bands. Each band uses a high quality inductor and carefully selected caps to give two switchable frequencies. The bands are carefully shaped and spaced to be...