Description
NSEQ-4
Discrete Solid State Two Channel Parametric EQ
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 (Dove Topology)
- 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
- Lovingly hand-crafted in Northern California
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
- Maximum Input Level (EQ Flat) + 28 dBu
- Maximum Input Level (EQ Full Boost) + 17 dBu
- Frequency Response +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
- Maximum Boost (21 Step Detented) +20 dB (+10 dB with range switch in)
- Maximum Cut (21 Step Detented) -20 dB (-10 dB with range switch in)
- EQ Frequencies
- 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
