From Millennia Media
The Millennia Media M-2b is a premium two-channel, high-voltage vacuum tube microphone preamplifier engineered to deliver absolute acoustic transparency, extreme headroom, and unprecedented signal fidelity. Unlike traditional tube preamplifiers that rely on high-distortion topologies and iron-core transformers to deliberately color audio signals, the M-2b utilizes a transformerless, high-voltage Class-A vacuum tube architecture designed for ultra-linear frequency response and minimal phase distortion.
At the core of the M-2b is Millennia’s proprietary HV-3 design philosophy, executed entirely with vacuum tubes running at high plate voltages (over 300V DC). By eliminating input and output audio transformers from the signal path, the M-2b avoids low-frequency phase shift, transient smearing, and unwanted harmonic saturation. The result is a tube preamplifier that captures subtle micro-dynamics, delicate high-frequency detail, and deep, uncolored bass response with pristine clarity and an open, three-dimensional soundstage.
Built without compromises for classical tracking, acoustic music, audiophile vocals, and critical scoring sessions, the M-2b combines high-grade military-spec components, gold-plated rotary switches, and heavy-duty mechanical construction to set the reference benchmark for transparent tube amplification.
The World’s Most Elegant Tube Mic Preamplifier
- Musical, involving, euphonic
- High speed transformerless, pure Class A, 350 volt
- triode design
- Differential topology: no attenuator “pads” required
- Effortless dynamics, vividly realistic ambience
- >35 dBu output headroom
- High resolution gain control
- Precision potentiometers, ultra-premium components
- Built for critical professional applications
- Gold audio connectors, tube sockets, and relays
- 3/8“ thick radius extruded aluminum face plate
- Durable mirror-gloss anodized finish
- Mil spec 16 gauge cold-rolled steel chassis
- Ultra-clean toroid power supply: internal sub-chassis
- Hand machined aluminum knobs,
- illuminated IT&T push buttons
- Richly musical vintage vacuum tubes available
- Mogami Neglex OFC audio wiring
- Silver Teflon power wiring
- Minimum Gain
- 14 dB
- Maximum Gain (3 ranges with continuous trim)
- 50 dB
- Frequency Response (+0 / -3 dB)
- 4 Hz to 130 kHz
- Noise (50 dBu Gain, 10 Hz - 30 kHz, 150 ohm Source)
- -116 dB EIN
Total Harmonic Distortion + Noise (30 dB Gain, 10 Hz - 20 kHz Bandwidth, 0 dBu Out): < .02%
- Intermodulation Distortion (50 Hz & 7 kHz)
- 35 dB Gain, +27 dBu Out< .0009%
- Phase Response (35 dB Gain, 20 Hz - 20 kHz, +26 dBu Out)
- < 10 degrees deviation
Phase Response, Stereo Deviation (35 dB Gain, 20 Hz - 40 kHz, +27 dBu Out): < 1 degree
- Common Mode Rejection Ratio (30 dB Gain, 1 kHz, 100 mV C.M.)
- > 60 dB
- Slew Rate (35 dB Gain, +27 dBu Out)
- > 20 Volts per microsecond
- Maximum Input Level (20 Hz - 40 kHz, 14 dB Gain)
- +20 dBu (no attenuator pads required)
- Maximum Output Level (20 Hz - 40 kHz, 10 kilohm Min. Load)
- > +35 dBu
Interchannel Crosstalk (30 dB Gain, 1 kHz, 0 dBu Both Outputs): < 70 dB
- 30 dB Gain, 1 kHz, 0 dBu Both Outputs
- < 70 dB
- Phantom Input Impedance
- 3.800 ohms
- Output Impedance
- 120 ohms
- DPA (B&K) Mic Powering
- +130 V dc max, (non-phantom)
- Phantom Powering
- +48 V dc, +/- 2 V dc
- Power Consumption
- 50 watts maximum
- Power Requirements
- Selectable: 100-120, 200-240 V ac, 50/60 Hz
- Dimensions/Shipping Weight
- 19” W x 3.5” H x 12” D, 26 lbs..
You may also like
Browse Stereo Mic Preamps →
Recommended accessories
Sound Pure Studios · Durham, NC
Come hear it in our control rooms.
Sound Pure is a working studio in Durham, NC — a 1,000 sq ft live room and two pro control rooms. Book a session to audition gear in a world-class acoustic space before you buy.