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Millennia HV-3D/4 4-channel Microphone Preamp , $3,200.00 - Add to Cart Skip to Product Information

Millennia HV-3D/4 4-channel Microphone Preamp

4-channel Microphone Preamp with Transformerless Design
Item ID: HV3D4
Millennia HV-3D/4 4-channel Microphone Preamp
$ 3,200 .00
Special Order

Special-ordered from Millennia and usually ships to you within a few weeks. Please note: special orders cannot be canceled or returned.

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 HV-3D/4 4-channel Microphone Preamp
Special Order

Special-ordered from Millennia and usually ships to you within a few weeks. Please note: special orders cannot be canceled or returned.

Note: While most of the items we sell ship for free, this item does not qualify for free shipping due to special circumstances.
$ 3,200 .00

Four channels of audiophile sound in the studio or on location!

This article was Written By

Our Product Research Team

Get to know them!

The Millennia HV-3D is an 4-channel version of the very successful and popular HV-3C stereo preamp. The HV-3D combines multiple channels to minimize redundant mechanical and electrical parts. This is a tool you can build a career around: it will remain valuable and useful no matter how far your sonic explorations take you. Acquiring an HV-3D is a step off the upgrade treadmill, a step that will ultimately save you much more than your initial investment. For pristine audio capture on location and in the studio, Millennia's HV-3D is a great option!

Millennia HV-3D at a Glance:
  • Open, Transparent Sound
  • Perfect for Location Recording
  • Pristine Audio Path

Open, Transparent Sound
Mic preamplifiers magnify the input as much as 1000:1. There's no "Undo" after this point. Coloration or distortion become part of the signal. Lost information can never be recovered. Digital plug-ins can't "uncolor" sound or restore lost upper harmonic partials. Data compression algorithms (MPG, AC3, DTS etc.) are unable to distinguish signal from noise, so preserving signal clarity and integrity throughout the recording and production process is critical to communicating the artist's intention and individuality. No matter how subtle or attractive, a colored "signature" sound destroys options at every link in the chain. The HV-3 Series' open, transparent signal path has defined "high definition" since its introduction.

Perfect for Location Recording
Location recording is a high-wire act, with only one chance to capture the living moment of performance in its original ambience. The HV-3 Series is designed to transmit microphone signals to recording devices unaltered and has proven its ability to drive extremely long cable runs.

Pristine Audio Path
There's no such thing as a straight wire with gain. But the HV-3 Series' transformerless input, balanced audio path, minimal amplifier design has brought us closer than any other to our goal of absolute accuracy and uncompromised sonic realism.

Millennia HV-3D Features:
  • Unsurpassed ambience retrieval
  • Transformerless design with matched hi-speed discrete transistor octet has 23 dB input headroom: no attenuator "pads"
  • needed
  • Uncolored timbral accuracy at all dynamic levels
  • Entirely balanced audio path with precision components maintains signal integrity: THD under 5 ppm (.0005%)
  • Effortless, vividly realistic, musical performance
  • Laser-trimmed FET-based output stage has 32 dB headroom: drives 1000 foot (300m) cable runs with ease
  • Standard 36-step gain controls (1.5 dB per step) are stereo-matched to .08 dB
  • Ultra-clean toroid power supply
  • Gold audio connectors and switches
  • Mogami Neglex OFC audio wiring
  • Silver Teflon power wiring
  • Welded 16 gauge steel rack chassis
  • Minimum Gain 8.5 dB
  • Maximum Gain (1.5 dB per step, 36 steps) 65 dB (up to 75 dB on request)
  • Frequency Response +0 / -3 dB sub 3 Hz to beyond 300 kHz
  • Noise 60 dB Gain, 10 Hz - 30 kHz, Inputs common -133 dB EIN
  • Total Harmonic Distortion + Noise 35 dB Gain, 10 Hz - 20 kHz bandwidth, +27 dBu Out < .001%, Typ. < .0005% (< 5 ppm)
  • Intermodulation Distortion (50 Hz & 7 kHz) 35 dB Gain, +27 dBu Out < .0009%
  • Phase Response 35 dB Gain, 50 Hz - 20 kHz bandwidth, +27 dBu Out < 2 degrees deviation
  • Common Mode Rejection Ratio 35 dB Gain, 10 Hz - 20 kHz bandwidth, 100 mV C.M. > 65 dB, Typ > 85 dB
  • Slew Rate 35 dB Gain, +27 dBu Out > 25 volts per microsecond
  • Maximum Input Level 20 Hz - 40 kHz +23 dBu (no attenuator pads required)
  • Maximum Output Level 20 Hz - 40 kHz +32 dBu
  • Phantom Input Impedance 1 kHz 6,750 ohms
  • Output Impedance 24.3 ohms (x2)
  • Phantom Powering +48 V dc, +/- 2 V dc
  • Power Requirements Selectable: 100-120, 200-240 V ac, 50/60 Hz
Millennia HV-3D - Four channels of pristine audio!
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

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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.