Parametric Equalizers

In present days, no mastering studio can pass a Massive Passive. The Massive Passive is probably the most commonly encountered equaliser in mastering studios and there is a reason. The unique sound and the unique way of operation enabling filtering options which can't be realised with other EQs set this device apart. The four parametric filters per channel are coupled in parallel. Thus, the Massive Passive behaves differently than other EQ - you can create curves for which you would need 6 bands with conventionally operating EQ.

How does it sound? The passive filters are very transparent and only the tubes lend character to the device. The centres are legendary and many believe there is nothing better for Rock. But even with acoustic music the Massive Passive retains an open character, even if a little more action has to be taken at times. In the bass and treble ranges, curves can be generated which are similar to the Manley Pultec. Just by varying the bandwidth a powerful and crisp, or a fat and warm bass can be created. The mastering version does not have discrete resistors behind the front panel like the SLAM! or VariMu, but works with mechanically stepped pots with a narrower range providing a higher resolution. You can use the standard version for mastering, no problem. When processing individual signals you just lean in a bit.

• Mastering version with stepped potentiometers and changed filters for mastering applications
• 4 Bands per channel
• Circuit completely passive
• Overlapping frequency ranges
• Each band offers the possibility of Shelf or Bell
• Each band: Cut, boost and off
• Tube make-up gain
• Passive high-pass and low-pass filter
• Level +4 dBU (can be switched to 10 internally)
• EQ frequency control range: 22 - 27000 Hz
• EQ Boost/cut range: 20 dB boost/20 dB cut
• Frequency range: +/- 2 dB: 8-60,000 Hz
• Maximum output at 1.5% THD dBv +37, +26 dBv at 20 Hz
• THD & Noise (1KHz at +4 dBu): 0.06%
• Noise floor (relative to +4 dBu): -85 DB (A Weight)
• Dynamic range: 120dB
• Bypass switch
• Inputs and outputs as balanced XLR and 6.3 mm TRS
• Weight: approx. 9.5 kg

• 4x Fully parametric EQ bands
• 2x Shelving EQs
• 1x Dynamic EQ section
• Instrument input on the front
• Frequency range: 5 Hz - 140 kHz
• XLR and 1/4 "TRS inputs and outputs
• Format: 19 "/ 1U

• 3-Band dual-channel equaliser
• Input transformer and discrete operational amplifier
• 6 Selectable frequencies per band
• Low band: 40 Hz, 60 Hz, 80 Hz, 120 Hz, 160 Hz, 240 Hz
• Mid-band: 315 Hz, 480 Hz, 640 Hz, 1,000 Hz, 1,300 Hz, 2,000 kHz
• High band: 2500 Hz, 38 Hz, 5000 Hz, 8000 Hz, 10000 Hz and A.I.R.

Mode:

• +/-8dB gain per band
• Adjustable high-pass filter (10 - 400 Hz) with bypass switch
• Bypass switch and clip LED per channel
• Frequency range: 10 - 80,000 Hz
• Dynamic range: 122 dB
• Max. output level: +23 dBu
• XLR input and output per channel
• Dimensions: 19" / 2U

• Active high & low-shelf EQ via high-gain tube amplifier
• Low-shelving: 20 Hz, 40 Hz, 80 Hz, 160 Hz, 320 Hz, 640 Hz with +/- 12 dB gain
• High-shelving: 1 kHz, 2 kHz, 5 kHz, 10 kHz, 15 kHz, 22 kHz with +/- 12 dB gain
• T filter (EQ rocker) with selectable center frequency: 0.5 kHz, 1 kHz, 2 kHz
• Variable highpass with 5 frequencies and bypass: 18 Hz, 25 Hz, 40 Hz, 60 Hz, 85 Hz
• Variable low-pass with 5 frequencies and bypass: 12 kHz, 15 kHz, 18 kHz, 20 kHz, 25 kHz
• Frequency response (-3dB): 5 Hz - 55 kHz
• Signal to noise ratio (Rg = 200 Ohm): 22 Hz - 22 kHz
• THD + n @ 40 Hz: 10 dBU
• Headroom (1% THD + n):> + 26 dBU
• Balanced XLR inputs and outputs
• Format: 19 "/ 2 U
• Depth: 165 mm
• Weight: 4.3 kg

• 4 Bands and lowcut per channel
• Colour feature
• Inputs / outputs: Balanced XLR
• Format: 19" / 2 HE

• Stereo equaliser with five bands
• Each band with 11 switchable frequencies, continuously adjustable quality and individual boost/bypass/cut selection
• Typical passive filter behaviour with rather broadband boosts and narrowband cuts
• Relay bypass
• Adjustable overall output level ( +3 to -5dB)
• Switchable between tube and solid state topology
• Tube amplification based on 6H23n (E88CC/6922) tubes
• Balanced XLR inputs and outputs
• Input impedance: approx. 5 kOhm
• Output impedance; approx. 1K Ohm
• Dimensions: 3 U, 19
• Weight: 8 kg

Note: Can only be operated with 230 V mains voltage

• 160 Parametric EQ
• 4 Band parametric equaliser
• +/- 15 dB Reduction filter and Q filter
• Input/Output XLR, TRS and RCA

• Individual boost and cut with 12 selectable frequencies per band
• Optimized Q-factor for every boost and cut frequency
• Boost/Cut, Q-Factor and Output Pot are each rasterized in 41 steps
• Auto Bypass function with interval control
• Max. Input Level: +32.5 dBu
• Max. Output level: +32.5 dBu
• Frequency response: 10 - 35,000 Hz
• Weight: 10.2 kg
• Design: 19" / 4 RU
• Colour: Red

• Individual boost and cut with 12 selectable frequencies per band
• Optimized Q-factor for every boost and cut frequency
• Boost/Cut, Q-Factor and Output Pot are each rasterised in 41 steps
• Auto Bypass function with interval control
• Max. Input Level: +32.5 dBu
• Max. Output level: +32.5 dBu
• Frequency response: 10 - 35,000 Hz
• Weight: 10.2 kg
• Design: 19" / 4 RU
• Colour: Black

• Precise control range of +/-5 dB for all 4 bands
• True stereo link
• Class-A topology
• Detented potentiometers
• High-low shelf bands
• Resonant high and low pass filter
• Two parametric mids with switchable Q
• Additional passive high-band
• 2 Line inputs: XLR and 6.3 mm jack
• 2 Line outputs: XLR and 6.3 mm jack
• 2 Additional line outputs: 6.3 mm jack
• Aluminium housing
• Format: 19" / 1 U
• Made in Germany

• Passive, all-tube midrange EQ based on the legendary Pultech MEQ5
• Weight: 3.8 kg
• Dimensions: 19" / 2U

• Filters based on the design of the 8801 and 88RS analogue consoles
• +/- 20 dB input trim
• High pass filter 25 Hz to 300 Hz 12 dB per octave
• Low pass filter 3 kHz to 15 kHz 12 dB per octave
• EQ High 1.5k to 18kHz
• Switchable shelving / Bell and Hi Q
• EQ Mid High 0.8 kHz to 9 kHz
• Q range: 0.3 to 7 freely adjustable
• EQ Mid Low 120 Hz to 2 kHz
• Q range: 0.3 to 7 freely adjustable
• EQ Low 33 Hz to 440Hz
• Switchable shelving / Bell and Hi Q
• EQ bypass
• USB port Mac or PC
• Connections: XLR / KLinke input +4 dBu, -10 dBV, XLR and parallel outputs
• Ext. Power supply 100V-250V

• Frequency range: 20 to 40,000 Hz (+/-0.3 dB)
• Rotary controls for tilt, bass, mid, treble and trim
• Frequency selection switch for bass (50, 100, 250 Hz), mid (500 Hz, 1 kHz, 2.5 kHz) and treble (5 kHz, 10 kHz, 12.5 kHz)
• Magic eye VU meter
• Hard bypass
• 2 Line inputs: XLR
• 2 Line outputs: XLR
• Integrated switching power supply 115/230V
• Construction: 19" / 3HE
• Weight: 11 kg

• Filters based on the design of the 8801 and 88RS analogue consoles
• +/- 20 dB input trim
• High pass filter 25 Hz to 300 Hz 12 dB per octave
• Low pass filter 3 kHz to 15 kHz 12 dB per octave
• EQ High 1.5k to 18kHz
• Switchable shelving / Bell and Hi Q
• EQ Mid High 0.8 kHz to 9 kHz
• Q range: 0.3 to 7 freely adjustable
• EQ Mid Low 120 Hz to 2 kHz
• Q range: 0.3 to 7 freely adjustable
• EQ Low 33 Hz to 440Hz
• Switchable shelving / Bell and Hi Q
• EQ bypass
• USB port Mac or PC
• Connections: XLR / KLinke input +4 dBu, -10 dBV, XLR and parallel outputs
• Ext. Power supply 100V-250V

• Class A
• High-quality selection of 12AX7 and 12AU7 tubes
• Custom MIDAS input and output converters
• Switchable frequency selection with up to 7 frequency settings
• Independent boost and cut controls
• Adjustable bandwidth for a variety of tonal possibilities
• Bypass feature for A / B comparisons
• Balanced inputs and outputs with Neutrik XLR sockets
• 2U Rack housing
• Multi-voltage car switching power supply
• Designed and developed in U.K.

Bettermaker Stereo Passive EQ; Stereo equalizer; 2-channel analog equalizer with digital control; all parameters digitally controlled by dedicated plugin; Maximum input level: +24 dBu; Maximum output level: +27 dBu; Maximum LF boost: 15 dB (set to 100 Hz); Maximum LF cut: 16 dB (set to 100 Hz); Maximum HF boost: 18 dB (all frequencies); Low boost/cut frequencies: 20, 30, 60, 100 Hz; High boost frequencies: 3, 4, 5, 6, 8, 10, 12, 16, 20, 28 kHz; High cut frequencies: 5, 10, 20 kHz; Dimensions: 2 U, 140mm depth; Weight: approx. 2.7 kg

• All potentiometers are screened for accurate and reproducible work
• Wide Q shelving for a natural and open sound character
• 7 Positions High Pass and Low Pass Filter on Relays for Phase Equality
• 8 Position high and low frequency selection
• 5 dB Cut and Boost Controls in 1 / 2dB for accurate settings
• Frequency range: +/- 0.1 dB from 10 Hz to 20 kHz, +/- 0.2 dB from 1 Hz to 80 kHz
• Maximum level: > +28 dBu
• Noise floor:
• THD + N:
• IMD:
• Crosstalk suppression:> 105 dB
• Input impedance: 25K ohms
• Output impedance: 50 ohms
• Dimensions: 19 " 1U