Overview
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
Flter 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
