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

Options
BK (DPA) +130V mic inputs
DC inputs for ideal performance with dynamic and
ribbon microphones

Downloads
M-2B Manual
M-2B Reset Template
M-2B Data Sheet

Not Quite What You Need?
HV-3R Remote Controlled Multi-Channel Preamplifier
HV-3C Stereo Mic Preamplifier
HV-3C24 Stereo Mic Pre & 24/192 POWR ADC
HV-3D Four or Eight Channel Mic Preamplifier

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 dB 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

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..