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Millennia NSEQ-HF High Frequency EQ 500 Rack Module  From Millennia

Millennia's NSEQ-HF is the high frequency peaking/shelving section of the industry-standard NSEQ-4 in a 500 Series module.

Millennia Media


Retail:  $765.00

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Millennia NSEQ-2 STT-1 EQ Demo Video - Part 3

Millennia's NSEQ2, the same EQ in the STT-1 Origin Mic Pre, is a very clean EQ that can be used in recordings of all genres. Previously, we explored the four band parametric EQ on Steinway grand piano and saxophone. In this video, we demonstrate how the EQ can give us a variety of colors on electric guitar in this rough mix of Scott Sawyer (http://www.scottsawyer.net/) and members of The Old Ceremony (http://www.theoldceremony.com/). Using the EQ, we can find the sound we want to fit the electric guitar into the mix. To find out more about this fantastic EQ, give us a call here at Sound Pure anywhere, anytime 919.682.5552. Or email us at sales@soundpure.com

Manufacturer's Description from Millennia

Full Timbral Control, Total Signal Integrity

Thousands upon thousands of professional engineers use the discrete Class A NSEQ parametric EQ's in mastering, post-production, live sound, mixing, and tracking. It's the parametric EQ found in the acclaimed STT-1 Origin Twin Topology channel strip. It's the same EQ topology found in the world's most widely used phono archiving system, the LOC (Library of Congress, etc.). It's the EQ used by countless professional artists from Celine Dion to Andreas Bocelli. It's the EQ used on the 2-bus main mix for over a decade of Academy Awards TV orchestra broadcasts (along with 100+ channels of Millennia HV-3 micamps).

We've lost count of the number of engineers who've told us that their "favorite thing about the NSEQ is its incredibly musical top end." It may not be an exaggeration to say that most clients use the NSEQ to breathe top-end musical life into their tracks. The one comment we hear continually:  "the 21kHz top end boost sounds like music, not like EQ."

So we thought it was time to create a new product that focused exclusively on the NSEQ's top-end. We call it the NSEQ-HF, and it's ready now for your 500-rack, at an attractive price point. The NSEQ-HF employs the identical circuitry found in the NSEQ-4:  our renowned FSA-03 Class A all-discrete J-FET amplifier and our DSA-01 Class A all-discrete J-FET true-differential line receiver. Both amplifiers use Toshiba 2SJ74 and 2SK170 discrete J-FETs exclusively, considered the holy grail of pure Class A discrete audio design topology.



  • World's first (and only) all-discrete, true differential Class-A JFET input buffer/amplifier
  • Selectable balanced or unbalanced input
  • Transformerless signal path
  • True hard-wire bypass when EQ not selected
  • 100% discrete Class A signal path using ultra-rare Toshiba J74 and K170 J-FETs
  • Minimalist design: only one active stage in the audio path (Dove Topology)
  • Extremely low noise: -106 dBu
  • Constructed for demanding professional applications
  • Ultra-Premium components throughout
  • Gold mil-spec Grayhill rotary freq-select switch
  • Lovingly hand-crafted in Northern California
Millennia Media

About Manufacturer

Established as a classical music recording company in the 1980s, Millennia Media has grown to become one of the world's respected manufacturers of critical audio recording products. Now with more than 40,000 microphone preamplifier channels shipped, Millennia continues to set sonic precedent in solid-state and vacuum tube mic amps, equalizers, compressors, mixers, and recording channels. With numerous industry awards, fourteen TEC nominations, ten PAR Excellence and Reviewer's Pick awards, an E.Q. Blue Ribbon Award, three Stereophile Class A awarded products, an extensive owner's register of leading audio professionals, and a reputation for musical realism second to none, we believe you won't find a more transparent range of professional audio products on the planet.


Filter Shape Shelving at 6 dB per octave. When LED is off, EQ is peaking with a fixed "Q" of 1.0
Maximum Output Level + 21 dBu
Maximum Input Level (EQ Flat) + 20 dBu Balanced, +14 dBu unbalanced
Maximum Input Level (EQ Full Boost) + 17 dBu
Frequency Response
+0 / -3 dB
sub 2 Hz to beyond 300 kHz
Maximum Cut/Boost (21 Step Detented) +/-18 dB (+/-9 dB with range switch in)
Frequency Centers – (Peak/Shelf Selectable) 4.8 k, 5.8 k, 8.0 k, 10 k, 16 k, 21 k
THD + Noise  
20 Hz - 30 kHz, All EQ Bands Switched In < .009%, typ < .003 %
Common Mode Rejection Ratio
10 Hz - 20 KHz, 100 mV C.M.
> 60 dB, Typ > 80 dB
Slew Rate, +21 dBu Out > 50 volts per microsecond
Hard-wire Bypass Switch?  Yes
Input Impedance 25 kilohms
Minimum Output Load Impedance 50 ohms
Recommended Load > 500 ohms
Output Impedance 5 ohms
EQ Amplifiers Pure Class-A Discrete J-FETs
Power Power consumption is +210mA with all LEDs on