Millennia Media HV-35 – Single Channel 500-Rack Microphone Preamplifier


  • Continuously variable gain control
  •  Front panel instrument input
  • DC coupled ribbon mic with 10dB gain boost setting
  • 80 Hz rolloff filter
  • 48V phantom power
  • 15 dB Pad
  • Polarity flip
  • API 500 series compatible format


Authentic Transparency for Unrestricted Creativity

This might be music’s purest preamp. It’s no wonder the iconic “HV-3” first dazzled engineers who worked with classical and acoustic music, where each and every single detail matters. But, more and more engineers from all genres have discovered the magic of the HV-3’s musically transparent circuitry. The fact is, you can never “undo” the color your microphone preamplifier adds. In contrast to preamps that lay on lots of colour, the Millennia HV-3 is meticulously crafted to give you the full, authentic voice of your microphone. That way, you’re not committed from the start, and you can easily sculpt your sound later with the exact character you want.

It’s here, the iconic HV-3 topology in a format perfect for your 500 Series rack. While Millennia was reworking the HV-3 to fit the form factor, they went ahead and incorporated all the push buttons that HV-3 fans had been asking for over the years. The easy-access buttons include a 15dB pad, a polarity flip, 48V phantom power, a 10dB switch for ribbon mics, a highpass filter, and switch for the front-panel hi-Z instrument input.

Pure, musical, incredibly smooth preamplifier

The HV-3 is there, but it’s not there. And that’s exactly how you want it. Built to offer the most transparent path from your microphone to the rest of your signal chain, the HV-3 features a transformerless input, balanced audio path, and minimal amplifier design. Aficionados of classical and acoustic-based music may have first discovered the promise of the HV-3’s honest approach to preamplification, but the preamp is rapidly making its way into studios of all genres. Once you’ve heard it, you’ll realize that no color is a color, too. What you give the HV-3, you get.

Preserves your sound for later processing

Much of our gear is soaked with character and personality. It’s easy to overdo it. The Millennia HV-3 is ideal for the engineer who wants to try on color, without committing to one sound from the start. When you’ve recorded with the HV-3, you know you’re starting from square one, so you can precisely dial in the tone, flavor, and character you want from your outboard gear or plug-in processors. To put it another way, if you were deciding what sculpture to make, you’d most likely want to start with an unchiseled piece of stone. The HV-3 translates the sound of the performance and the voice of your microphone, without getting in the way.

Known to save you time with EQ

When you’re used to processing coloured audio from the start, working with an HV-3 preamplifier will be a change. But, it’s an easy workflow to get into. In particular, engineers who have used the HV-3 often note that tracks are somehow easier to EQ. With the right mic, in the right place, the HV-3 delivers a smooth, natural response that seems to require less tinkering. Without the heavy hand of a preamp, tracks seem to fall together into place.

Millennia gear is made for detail

Founder and chief designer John La Grue takes the same approach to his exceptional audio gear as he does to the wine he cultivates in the California countryside. Detail matters, it’s everything. Whether in a vintage of wine or your multi-track mix, taken together, those details can make a major difference in the end result. Millennia equipment celebrates those fine, subtle points, bringing you gear that’s built with uncompromising quality to deliver purity in music.


Minimum Gain 14.5 dB, 1dB with Pad
Maximum Gain (continuously variable) 60 dB (70 dB in Ribbon Mode)
Frequency Response (-3 dB) < 10 Hz to  > 200 kHz
typical -1.0 dB @ 10 Hz
typical  -1.5 dB @ 200 kHz
Noise  (60 dB Gain, 10 Hz – 30 kHz, Inputs common) -130 dB EIN
Total Harmonic Distortion + Noise  (35 dB Gain, 10 Hz – 20 kHz bandwidth, +24 dBu Out) < .003%, Typical < .001%
Intermodulation Distortion (50 Hz & 7 kHz) 35 dB Gain < .0006% +12 dBu Out
< .001% +20 dBu Out
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, +24 dBu Out) > 25 Volts per microsecond
Maximum Input Level (20 Hz – 40 kHz) +12dBu @ 0.02% THD+N
Maximum Output Level 1 kHz @ 35dB of gain, THD+N is:
< 0.001% at +26dBu output
< 0.05% @ +28 dBu output.
Phantom Input Impedance  (1 kHz) 2,210 ohms
Output Impedance 24.3 Ohms (x2)
Phantom Powering provided by 500 rack
Dimensions/Shipping Weight 1.5” W x 5.25” H x 6” D, 2 lbs.


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Additional information

Weight 10 kg


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