The LA-2A Leveling Amplifier is an audio compressor originally produced by Teletronix in the early 1960s. Three versions of the LA-2A were made until 1969. The LA-2A was inducted into the TECnology Hall of Fame in 2004. The LA-2A is a hand-wired, tube-based, compressor. It uses a electro-luminescent panel together with a cadmium-sulfide light dependent resistor to provide gain reduction, which, in the LA-2A, is called the T4 cell.

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  • The LA-2A Leveling Amplifier is an audio compressor originally produced by Teletronix in the early 1960s. Three versions of the LA-2A were made until 1969. The LA-2A was inducted into the TECnology Hall of Fame in 2004. The LA-2A is a hand-wired, tube-based, compressor. It uses a electro-luminescent panel together with a cadmium-sulfide light dependent resistor to provide gain reduction, which, in the LA-2A, is called the T4 cell. The properties of the T4 give the LA-2A its unique character by making it an entirely program dependant design. The attack time is 10 microseconds (practically instantaneous), the release time is about 60 milliseconds for 50% release and the 0.5 to 5 seconds for full release, depending on the previous program material. The LA-2A has simple controls: a Peak-Reduction knob controls the gain of the side-chain circuit, and therefore, the gain reduction; a Gain Control for make-up gain; and a Limit/Compress switch which alter the compression ratio. The VU meter may also be switched to show gain reduction or output level. The LA-2A has a sonic character that make it sought after by many recording engineers.
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  • Jim Scott
  • LA-2As warm things up. ...they EQ all the warmth and low mids and bass. When you put bass and drums in them they get fatter and bigger. And unless you hit them way hard and make the tubes sizzle they don't really distort.
  • http://www.uaudio.com/_works/pdf/manuals/LA-2A_manual.pdf
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  • The LA-2A Leveling Amplifier is an audio compressor originally produced by Teletronix in the early 1960s. Three versions of the LA-2A were made until 1969. The LA-2A was inducted into the TECnology Hall of Fame in 2004. The LA-2A is a hand-wired, tube-based, compressor. It uses a electro-luminescent panel together with a cadmium-sulfide light dependent resistor to provide gain reduction, which, in the LA-2A, is called the T4 cell.
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  • LA-2A Leveling Amplifier
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