signal processing parametic EQ

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A Designs A Designs:

The HAMMER is a dual mono three band tube EQ engineered with an ingenious filtering system that allows the even harmonics to flow thru the 12AT7 tubes filtering out unwanted noise. The EM-PEQ is a new 500 Series module that sonically nods to the classic Pultec EQP-1A sound. A-Designs Audio was able to ‘shrink’ this filter design into the 500 Series format without compromise to either build quality or sonics.

Website: A Designs

Chandler Limited Chandler Limited: The EMI TG12345 Curve Bender is the ultimate TG equalizer issued in celebration of the 75th birthday of Abbey Road Studios. The Curve Bender is based on the vintage EMI TG12345 desk used to record The Beatles and Pink Floyd. The Germanium Tone Control uses active and passive EQ circuits in combination with the GERMANIUM amplifier and incorporates Feedback and Drive controls. Website: Chandler Limited

Drawmer Drawmer: The 1961 Vacuum Tube Equalizer combines low noise circuitry with no fewer than twelve active tube stages to provide two channels of  equalization possessing unique 'personality'. Rather than employ a continuously variable resistor as a means of frequency control, the 1961 utilizes the same rotary 'step' switching system used in vintage designs . This enables the component values for each frequency band to be optimized for performance across the entire audio spectrum and also makes setting up more accurate, particularly when treating stereo signals.Website: Drawmer

Empirical Labs Empirical Labs: The Lil FrEQ, a one single-height box, offers a high-pass section, high and low shelving, four sections of fully parametric EQ, and a dynamic EQ section that combines filters with a compressor-like circuit that can help contain and control excessive high frequency content such as sibilants, especially in the absence of other lower frequency content. Website: Empirical Labs

GML (Geo. Massenburg Labs) GML (Geo. Massenburg Labs): The 8200 has been an industry standard for over twenty years. Each of the five broadly-overlapping bands offers 15dB of Boost or Cut and adjustable bandwidth (or “Q”) from 0.4 to 4. The lowest and highest bands also can be switched to Shelf mode. The 9500 is the Mastering Version of the 8200. The Gain, Frequency, and Q controls are fully-detented for absolute precision and repeatability.Website: GML (Geo. Massenburg Labs)

Great River Great River: The EQ-1NV (one channel equalizer) greatly modernizes the classic British “1081/1083”-type design. This “desktop” (and rackable) digitally controlled analog parametric EQ offers similar topology to vintage 1081/1083 models. The EQ-2NV is the two-channel version of the EQ-1NV. The MAQ-2NV is a stereo mastering equalizer based on the EQ-2NV.Website: Great River

Langevin (Manley Labs) Langevin (Manley Labs): Manley Laboratories is the only authorized user of the original Western Electric passive EQ circuitry previously licensed to Pulse Techniques Inc. found in the well-known (and still sought after in the used market) antique Pultecs. EQ may be set to "flat" positions or bypassed entirely.Website: Langevin (Manley Labs)

Millenia Millenia: The NSEQ-2 is a f

ully parametric stereo EQ focusing on sonic purity & integrity with an a

ll triode 300 V vacuum tube signal path "or" an a

ll discrete J-FET solid state signal path.

Both topologies are entirely transformerless, high voltage, and  pure Class A.
Website: Millenia

Presonus Presonus: The EQ3B is a compact three-band fully parametric single channel analog EQ with smooth highs and solid lows. Perfect for carving out unwanted frequencies or musically boosting frequencies that need to be empasized.Website: Presonus

Summit Audio Summit Audio:

The Element 78 EQ-200 is a two channel analog EQ with full reset, recall, and automation abilities. The EQF-100 is a full range, single channel passive parametric equalizer that utilizes vacuum tube technology to overcome any gain loss. The EQP-200B is a full range two channel passive, vacuum tube equalizer. The FeQ-50 is a four band, single channel, parametric, passive equalizer.

Website: Summit Audio

TC Electronic TC Electronic: TC Electronic offers the EQ Station using cutting edge 48 bit DSP processing and superb ADA conversion technology - the next generation EQ solution for the most demanding live-sound applications.Website: TC Electronic

Tube-Tech Tube-Tech: The EQ 1A is a full range one channel unit, featuring low and high cut, low and high shelving as well as three overlapping bands of equalization. The ME 1B is a passive tube based midrange equalizer developed to match and surpass the demands of even the most discerning studio engineers. The PE 1C is a passive tube based program equalizer designed to meet the exacting standards of even the most demanding studio engineers. The EM 1A "500 Series" Equalizer contains a low frequency boost and attenuation section (shelving), and a high frequency boost section (peaking). Website: Tube-Tech

Avalon Design Avalon Design: The AD2055 combines 100% discrete, pure class A signal amplifiers with state-of- the-art passive and active filter topologies. The AD2055's unique circuitry delivers very high resolution transient detail at the operational extremes of real world equalization demands.Website: Avalon Design

Crane Song Crane Song: The Ibis features four bands of switch-selectable frequencies centered on and covering musical-step intervals from 32-Hz "C" to 22.35-kHz "F." Its four overlapping bands are labeled with note names and frequency allowing for the first time a "translation" between musician-speak and engineer-jargon. The bandwidth control has similar notation with adjustment from 0.1 octave to 4 octaves per band and a boost / cut range of 12 dB. Website: Crane Song

EAR (Esoteric Audio Research) EAR (Esoteric Audio Research): The EAR 822Q/823 Equalizer is a recreation of the Pultec EQP-1A and MEQ-5. The unit boasts passive filters and tube amplifiers. Two bands of selectable frequency mid boost and one of mid cut are also featured. The 825 Dual Stereo Mastering EQ's input and output amplifiers offer low distortion, low noise, high headroom and wide bandwidth.Website: EAR (Esoteric Audio Research)

Portico (Rupert Neve Designs) Portico (Rupert Neve Designs):

The 5033 features Mr. Rupert Neve’s custom input and output transformer designs, five bands of EQ based on his traditional curves, -/+12dB input level adjustment, five filter bypasses and comes available in either horizontal or vertical formats.

Website: Portico (Rupert Neve Designs)

Speck Electronics Speck Electronics: The model ASC is a compact 4 band parametric equalizer that has 12 controls for equalization adjustment and covers the audio spectrum from a low 20Hz all the way up to 25kHz.. There is a - 12/+6 dB gain control that handles the level variations when patching between balanced and unbalanced gear. A bypass switch silently removes the equalizer from the audio path.Website: Speck Electronics

SPL (Sound Performance Lab) SPL (Sound Performance Lab):

The Qure is a 2-channel, parametric, 3-band EQ, ideally suited for tonal shaping of individual instruments, voices and complex musical signals. Mastering applications benefit from a unique tonal potential and sophisticated filter designs. Each filter is serially connected on separate boards with individual op-amps, resulting in excellent noise and distortion values with a hard bypass available for each individual filter.

Website: SPL (Sound Performance Lab)

TL Audio TL Audio: The 5013 features a peaking/shelving option on both LF and HF bands plus a ‘Fat" contour switch on both channels. The interfacing options include separate input and output level controls for easy level matching with any other equipment, and a choice of balanced and unbalanced line inputs/outputs plus instrument DI inputs. The 5013 employs two valve stages per channel, in the form of a Sovtek ECC83/12AX7A twin triode valve. One stage is positioned pre the EQ filters, and one is post EQ: both are run at 150V DC from a fully stabilised PSU.Website: TL Audio

Buzz Audio Buzz Audio: The MPE-1.1 is a professional quality audio equalizer featuring a High Pass Filter, High & Low Shelving bands and two Parametric Mid bands. Individual bypass switches allows the user to remove unused sections from the signal path and an Input Gain control completes the package. The REQ 2.2 is not a fully passive equalizer - each band has an amplifier associated with it and for this function we use our discrete true Class A BE40 amplifiers ensuring high spec audio performance. This approach maintains a very low noise floor compared to fully passive EQ's where over 20dB make up gain can be required to account for losses. Website: Buzz Audio

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