Brand new - Closed Box
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Full Timbral Control, Total Signal Integrity

  • World's first (and only) all-discrete, true differential Class-A input buffer/amplifier.
  • Selectable balanced or unbalanced input.
  • Greatly improved 3rd generation FSA-03 all-discrete EQ amplifier
  • Improved output stage
  • True hard-wire bypass when EQ not selected
  • Upgraded power supply
  • Fully parametric stereo EQ with unprecedented sonic purity and integrity
  • All discrete J-FET solid state signal path
  • Minimalist design: only one active stage in the audio path
  • Identical EQ stage used in Library of Congress archiving path
  • Four EQ bands: 20 Hz to 20 kHz center frequency, 0.4 to 4.0 Q
  • Extremely low noise: -106 dBu
  • Constructed for demanding professional applications
  • Ultra-Premium components throughout
  • Gold relays, connectors, switches,
  • Silver Teflon power wiring, Mogami Neglex OFC audio wiring

Options

  • Detented, loggable controls
  • Differentially balanced inputs
  • NSEQ-2 can be converted to an NSEQ-4

Specifications

“Q” Range Q = 0.4 to 4.0 Adjustable on middle ranges

  Q = 1.0 Fixed on low & high ranges

Maximum Output Level > + 28 dBu

+ 28 dBu

Maximum Input Level (EQ Full Boost) + 17 dBu

+0 / -3 dB sub 2 Hz to beyond 300 kHz

Frequency Response, Stereo Deviation +/- 0.5 dB (with Mastering Option)

Noise (All EQ Stages In, Controls Flat) -106 dBu

+20 dB (+10 dB with range switch in)

Maximum Cut (21 Step Detented) -20 dB (-10 dB with range switch in)

Low Range Switch (Centers - Peak/Shelf Selectable): 20, 34, 56, 100, 180, 270

Low Mid Sweep: 20 Hz - 220 Hz or 200 Hz - 2.2 kHz.

10X Range switch selectable.

Hi Mid Sweep: 250 Hz - 2.5 kHz or 2.5 kHz - 25 kHz.

10X Range switch selectable.

High Range Switch (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, +27 dBu Out > 50 volts per microsecond

Main Hard-wire Bypass Switch For Each Channel? Yes

Peak/Shelf Selection On High & Low Range? Yes

Hard-wire Bypass Switching On Individual EQ Bands? 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

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ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.Learn more
Brand
Model
  • NSEQ-4 Discrete Solid State Two Channel Parametric EQ
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