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VT-5

VT-5
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Description


Stereo Passive Tube Equalizer

New VT-5 units have been optimized to eliminate the need for an internal fan. While the fans in D.W. Fearn equipment has always been extraordinarily quiet, research has shown that no fan is even quieter.

This equalizer uses passive LC circuitry with class-A triode vacuum tube stages for the input and output. The tube circuitry is largely derived from the VT-1/VT-2 mic preamp design, so the equalizer has much the same sonic character as the preamps.

The LC-style passive equalization circuitry is based on the classic designs that are still the best-sounding way to achieve high-quality tonal control.

The input is line-level, transformer balanced-bridging. An active vacuum tube input section has adjustable gain to accommodate input signals as low as -10 dBm. The input transformer is made by Jensen. The output stage utilizes the same custom Jensen transformer used on the VT-1/VT-2 mic preamps.

All controls are stepped for precise repeatability and uniform matching between units. High-quality rotary switches are used with 1% metal-film resistors. All of the audio capacitors are polystyrene or polypropylene. The inductors are custom-made for us by Jensen Transformers Inc.

The equalizer is constructed of heavy-gauge aluminum, with a 3RU (5.25 inch), 1/4-inch thick front panel, finished in D.W. Fearn red. It matches the VT-1/VT-2 series of mic preamps in appearance and construction.

Like the VT-1/VT-2 preamps, the Equalizer has been designed to provide an exceptional tool for audio professionals. The design frequencies and curves were determined by ear, after extensive listening to a variety of program material, both individual tracks and overall mixes. The result is a highly-musical equalizer with plenty of range for enhancing any track or mix.

Specifications

(EQ out): Low Cut @ 30, 40, 100, or 400 Hz, 0 to -18 dB shelving in 2 dB steps
Frequency response: ± 0.2 dB 20 Hz to 20 kHz Low Boost @ 20, 40, 60, or 140 Hz, 0 to 16 dB shelving in 2 dB steps
THD: less than 0.06% Mid Cut @ 200, 300, 400, 500, 600, or 700 Hz, 0 to -16 dB in 2 dB steps
Signal-to-Noise: better than 80 dB High Boost @ 1.5, 3, 4, 5, 8, 10, 12, or 16 kHz, 0 to 12 dB in 2 dB steps
  High Bandwidth Q of 0.6, 0.8, 1.0, 1.4, or 1.7
  High Frequency Cut @ 1.5, 3.5, 8, or 28 kHz, 0 to -14 dB shelving in 2 dB steps
  Gain adjustable from -9 to +9 dB, referenced to +4 dBm, in 3 dB steps
NOTE: Frequency is specified in cycles per second (cps) or kilocycles per second (kc). These units correspond to Hz and kHz respectively. Measurements made with -50 dBm input and 50 dB gain in a 22 cps to 22 kc bandwidth. Specifications and price subject to change without notice.  

(For full specifications see manufacturers product site under "links" tab)

 

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