Microphone Preamplifiers

Specifications

· Input 150 ohms

· Input Load Impedance 1.5k ohms

· Minimum Input Level -65 dBm nominal

· Maximum Input Level @ 20 cps -30 dBm without pad, -5 dBm with 20 dB pad

· Gain 53 dB

· Frequency Response +/-0.25 dB 20 cps to 20 kc; -3 dB @ 0.5 cps and 55 kc

· THD+Noise less than 0.25% 20 cps to 20 kc

· Intermodulation Distortion SMPTE less than 0.02%

· Signal to Noise Ratio 74 dB minimum

· Equivalent Input Noise -124 dBm maximum

· Output low-Z, transformer-balanced

· Maximum Output Level +22 dBm, 20k ohm load

· Power Requirements 100, 120, or 220 VAC, 50/60 Hz

· Dimensions 19″ (48.26cm) W, 5.25″ (13.34cm) H, 14″ (35.56cm) D· Weight 18 lbs (8.16kg)

Features

All vacuum-tube design

Clean and airy high end

Fat low end

Unsurpassed warmth, transparency, and musicality

Lo-Z input position for superior performance with transformerless mics

Phase (polarity) reverse switch

+48 volt phantom power (completely disconnected when off)

Custom-design Jensen input and output transformers for superb sonics

20 dB input pad (switchable)

True VU meters (amplifier isolated)

All point-to-point audio wiring

High-performance, fully-regulated power supplies with exceptional reserve

Gold input and output XLR connectors

Polypropylene and polystyrene coupling capacitors

All audio switching through gold-contact, sealed precision relays

International operation on 100, 120, or 220 VAC, 50/60 Hz

CE certified, RoHS-compliant

+4 dBm output 

Conservatively rated precision components and rugged construction for stability and long life

The VT-series microphone preamplifiers will change the way you think of audio quality. The transparency is astounding. Vocals sound smoother, warmer, more intimate, with a compelling presence. Any microphone and any sound will benefit from the improved clarity, definition, and lack of solid-state artifacts.