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An analog VU meter with peak LED. A volume unit (VU) meter or standard volume indicator (SVI) is a device displaying a representation of the signal level in audio equipment.. The original design was proposed in the 1940 IRE paper, A New Standard Volume Indicator and Reference Level, written by experts from CBS, NBC, and Bell Telephone Laboratories. [1]
The second amplifier released was the Phase Linear 400 with 200 watts per channel. It shared the same distinctive brushed aluminum, dual VU meters front panel style as the 700. It retailed for just under $500. [1] The next product was the Phase Linear 4000 Series Auto-correlation Pre-Amplifier introduced in 1973 and manufactured through 1978.
McIntosh audio products can usually be recognized by their black glass front panels (circa 1960's to present), [17] iconic blue VU meters (circa 1974 to present), [18] and iconic gothic logo. [ 19 ] [ 20 ] The Mcintosh factory has a black facade with blue tinted windows to align with the company's trademark theme.
Ashdown ABM VU Meter. Ashdown Engineering is a British manufacturer of instrument amplifiers, particularly for bass [1] ... Besides bass amplifiers and cabinets, [2] ...
The VU meter may also be switched to show the gain reduction or output level. The average attack time is 10 milliseconds, [ 5 ] while the release time is about 60 ms for 50% release and 0.5 to 5 seconds for full release, depending on the previous program material.
An unusual feature on Ashdown bass amps is a VU meter with a needle, which indicates input signal levels (pictured is the Ashdown ABM-300). On some amps, setting the "gain" or "drive" control above a certain setting causes an overdrive effect , either due to the natural effect of overloading the preamplifier (or the preamp tube on a tube ...
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