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Millennia NSEQ-4 2-channel Parametric Equalizer , $4,400.00 - Add to Cart Skip to Product Information

Millennia NSEQ-4 2-channel Parametric Equalizer

2-channel, 4-band Parametric Equalizer with Discrete, Class A J-FET Solid-state Signal Path
Be the first to review Item ID: NSEQ4
Millennia NSEQ-4 2-channel Parametric Equalizer
Millennia NSEQ-4 2-channel Parametric Equalizer

Special Order

Special-ordered from Millennia and usually ships to you within 1-2 weeks. Please note: special orders cannot be canceled or returned. Estimated September 7, 2026

Note: While most of the items we sell ship for free, this item does not qualify for free shipping due to special circumstances.
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Millennia NSEQ-4 2-channel Parametric Equalizer
Special Order

Special-ordered from Millennia and usually ships to you within 1-2 weeks. Please note: special orders cannot be canceled or returned. Estimated September 7, 2026

Note: While most of the items we sell ship for free, this item does not qualify for free shipping due to special circumstances.

Millennia’s Ultra-transparent Stereo Parametric EQ

This article was Written By

Our Product Research Team

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Starting out in the world of audiophile classical recordings, Millennia has established a well-deserved reputation for excellence in producing audio equipment for critical applications. Supporting that reputation is the NSEQ-4, a 2-channel, 4-band parametric equalizer that features an all-discrete solid-state JFET signal path sporting a groundbreaking true-differential Class A input buffer/amplifier. The Millennia NSEQ-4 incorporates Millennia’s purist proprietary Dove Topology, which uses no transformers and only one active stage in the audio signal path, resulting in audiophile-grade transparency. A joy to use, the NSEQ-4 facilitates quick, surgical tonal shaping of your tracks, stereo stems, and complete mixes.

Purist audiophile circuitry

With just one active stage in the audio signal path, the Millennia NSEQ-4 sets itself apart from most other parametric EQ designs that employ anywhere from three to seven active amplifiers in the signal path. Fewer amplifier stages mean greater sonic integrity and heightened musical realism. This single amplifier is optimized as an input buffer, EQ amplifier, and output driver. The musical clarity is immediately audible, as your audio signals are spared from the coloration of multiple amplifier stages. It's something you simply must hear to appreciate!

Why transformerless?

Transformers impart a fat, punchy tonality to audio signals, but they also add coloration — which may be desirable in some instances. Transformers are not, however, conducive to sonic purity. Of course, it depends on the type of sound you’re going for. But why limit yourself when there are many other methods of infusing audio material with vintage flavor? Deploying innovative proprietary design techniques, Millennia avoids the use of audio transformers in the NSEQ-4, allowing the pure musicality of Class A equalization to be realized without the unavoidable sonic artifacts common to signal path transformers.

Top-drawer components

The NSEQ-4’s exquisitely designed Class A amplifier is free of transformer coupling and meticulously optimized around premium passive components such as Vishay pots, mil-spec gold switches, Wima and Electrocube capacitors, silver Teflon power wiring, and Neglex OFC audio cabling. One listening test with the NSEQ-4 will immediately confirm that Millennia has once again set precedence in musicality and sonic transparency. Seasoned recording engineers at Sweetwater praise Millennia’s purist NSEQ-4 EQ circuit as being unerringly accurate, highly musical, and impressively effective for quickly sculpting signals with surgical precision. We’re confident you’ll agree!

Millennia NSEQ-4 2-channel Stereo Parametric Equalizer Features:

  • Discrete solid-state 2-channel, 4-band parametric EQ
  • Designed for exacting professional applications
  • Premium components used throughout
  • Proprietary all-discrete, true-differential Class A input buffer/amplifier
  • Selectable balanced or unbalanced input
  • Improved 3rd-generation FSA-03 all-discrete EQ amplifier
  • Improved output stage
  • True hardwire bypass when EQ not selected
  • Fully parametric stereo EQ with unparalleled sonic purity and integrity
  • All-discrete solid-state JFET signal path
  • Minimalist design: only one active stage in the audio path (Dove Topology)
  • Identical EQ stage used in Library of Congress archiving path
  • 4 EQ bands spanning 20Hz–21kHz center frequencies
  • Q selectable from 0.4 to 4.0
  • Extremely low noise: -106 dBu
  • Gold relays, connectors, and switches
  • Silver Teflon power wiring, Mogami Neglex OFC audio wiring
  • Upgraded power supply
  • Handcrafted in Northern California
What Does "Special Order" Mean?

A special-order product is one that we don't normally keep in stock. We order it from the manufacturer as soon as you order from us. We have great relationships with all the manufacturers we carry, so we can get your special order to you as fast as or faster than anyone else. Remember that special orders are non-returnable and non-cancelable, so make sure the item is right for you. A Sweetwater Sales Engineer can help you decide — call (800) 222-4700 for assistance!

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
Learn More about Total Confidence Coverage

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.