Combining a precisely matched octet of discrete bipolar transistors with a laser trimmed DC coupled FET-based output driver stage, the HV-3C (tm) is an entirely "double balanced," extremely wide dynamic range stereo microphone preamplifier intended for demanding acoustic recording. Unlike "textbook" mic preamplifiers, the HV-3C signal path never unbalances or rebalances the original signal — thus maintaining a high degree of signal integrity. Over 20,000 channels of HV-3 micamps are already in use by a who's-who in critical acoustic recording

HV-3C signal path from input through output is entirely balanced with a minimum amplifier topology. Uncompromising circuit design with meticulous selection and hand-matching of critical components assures consistently transparent audio performance at all dynamic excursions and frequency extensions.

Authentic Transparency for Unrestricted Creativity

• 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 level

• 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 (300 m) 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

Options

• 24-bit 192 kHz A/D “POW-R” converters (tba)
• DPA (B&K) +130 V mic inputs
• DC inputs for ideal performance with dynamic and ribbon microphones

i© 1997 Posthorn Recordings