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</html>";s:4:"text";s:8470:"No expense has been spared to bring that classic sound to your recordings. Though the T4 cell makes the LA-2A shine, the overall transformer and tube amplifier design of the LA-2A also plays a huge part in its longevity and popularity. Teletronix LA-2A Leveling Amplifier Vintage Tube Compressor Limiter. And unless you hit them way hard and make the tubes sizzle they don't really distort. The LA-2A Leveling Amplifier is an audio compressor invented by James F. Lawrence II, founder of the Teletronix Engineering Company in Pasadena, California in the early 1960s. Find link is a tool written by Edward Betts.. searching for LA-2A Leveling Amplifier 1 found (6 total) alternate case: lA-2A Leveling Amplifier Valve Amplification Company (499 words) case mismatch in snippet view article find links to article it redeveloped and produced the first 200 recreations of the LA-2A leveling amplifier for Universal Audio in 1998. He combined a luminescent panel with photo resistors (whose impedance changes relative to light intensity) and sealed them in a vacuum-tube-sized metal canister. Three versions of the LA-2A were made until 1969. Whether hardware or DSP, it is this special qualified manufacturing process and “recipe” UA re-established that gives the LA-2A its unique, musical sonic quality to this day. 124. The average attack time is 10 milliseconds,[4] 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.[5]. Listing Ended. As the input level decreases, the light dims and the resistor’s impedance decreases. Teletronix. Nowadays, this predecessor to the LA-2A is extremely rare and hard to find, but is still revered for its own unique, slow, time constant. Exploring Additional Compressors and Equalizers (EQs) Teletronix LA-3A 3m 36s. The LA-2A has a sonic character that makes it sought after by many recording engineers. It required working with the original manufacturer to perfect it, to dial it in to the specifications of the original photocells from the 1960s. Whether by serendipity or intent, Jim Lawrence’s T4 design had a musical response that allowed the LA-2A the sonic and technological longevity it still retains. When Bill Putnam Jr. refounded Universal Audio in 1999, reissuing the LA-2A once produced by his father was at the forefront of this mind. Compressor action occurs from the breakaway point at -30 DB input and up to -20 DB, at which point the curve becomes horizontal to exhibit limiting action. With painstaking care, every new LA-2A unit is point-to-point handwired in Scotts Valley, California, with every component carefully evaluated for authenticity. “Actually, we’re selling more of the hardware LA-2As now than we ever have,” Putnam replied. Page 1. My father purchased the product rights and the name Teletronix from Babcock Engineering in 1967, folding it into his Studio Electronics Corporation, shortly before … Sales. Bill Putnam purchased the product rights and the name Teletronix from Babcock Engineering in 1967, folding it into his Studio Electronics Corporation, shortly before he changed the name to UREI. In 1965, Jim Lawrence sold Teletronix to Babcock Electronics of Costa Mesa, California. Universal Audio’s Teletronix LA-2A Classic Leveling Amplifier reissue provides the performance characteristics of the iconic original. Replicating the crucial T4 optical attenuator for a faithful LA-2A reproduction involved a lengthy study of the original photocell formula — including working with both modern device physicists and the developers of the original 60s-era photocells. A uniquely accurate model of the legendary Teletronix™ LA-2A optical leveling amplifier. It puts the silky, smooth sound of this highly desirable unit … It's a totally different device in terms of construction where all the compression magic happens inside an optically coupled element formed by a fluorescent panel and some photocells: the famed T4A element. The LA-2A Leveling Amplifier is an audio compressor invented by James F. Lawrence II, founder of the Teletronix Engineering Company in Pasadena, California in the early 1960s. Buy New. http://www.uaudio.com/blog/la-2a-analog-obsession, https://www.uaudio.com/webzine/2003/june/text/content4.html, https://en.wikipedia.org/w/index.php?title=LA-2A_Leveling_Amplifier&oldid=941889196, Creative Commons Attribution-ShareAlike License, The LA-3A, a transistorised version of the LA-2A, This page was last edited on 21 February 2020, at 08:00. The 2A-KT draws inspiration from the original Teletronix LA-2A leveling amplifier, which was first produced in the early 1960s. Universal Audio Teletronix LA-2A Classic Leveling Amplifier limiter. His revolutionary idea was to create the world’s first leveling amplifier utilizing optical sensors. Lawrence drew from his background with military optical sensors to design a circuit which would “level” the incoming audio signal. Whisper-quiet operation and a wide, wide dynamic range make this tone-tool an unparalleled tone enhancer on stage and in the studio—its natural warmth and clarity are unmatched. Autry’s fondness for the LA-1 was instrumental in its gaining acceptance. Second Hand Sam Guitars . Service manuals, schematics, eproms for electrical technicians. This is an improvement that many mixing engineers will find useful for a wide variety of use cases, such as ducking or pumping of synth sounds in EDM. The effect is illustrated in Figure This is classic opto-compressor, Which uses electro-luminescent panel and photoresistors to provide gain reduction. UAD Hardware is … This not only allowed us to develop an accurate DSP model of the gain reduction behavior, it also helped us make our hardware T4 more consistent.”. I have just modified one external link on LA-2A Leveling Amplifier. By today's standards, the Teletronix LA-2A Leveling Amplifier from Universal Audio appears to be a rather primitive compression device. Though there have been reissues of the LA-2A, very little has changed from the original design, which is a testament to its reliability and linear response. UAD Teletronix® LA-2A Classic Leveling Amplifier Plug-In. 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 alters the compression ratio. Cakewalk has announced that is offering for free (limited time offer) its CA-2A Leveling Amplifier plugin for Windows and Mac OSX. The VU meter may also be switched to show the gain reduction or output level. That introduction lead CBS to buy a pair of LA-2s and shortly after, RCA purchased LA-2s for its New York and Nashville operations. A variety of cosmetic changes were made as well — including changing the metering switch from a multiposition toggle switch to a rotary switch. If compression is heavy or the signal is above the threshold for a long duration, then the release will be slower. Let’s look inside the T4 optical attenuator, which is the heart of the LA-2A. Please take a moment to review my edit . The Effectrode ® ‘LA-1A’ Leveling Amplifier is a high-end, studio-grade vacuum tube compressor in a pedal. Pro Audio. 30+ Joined Reverb. “It treats your signal so lovingly,” says Bill Putnam Jr., CEO of Universal Audio. The original LA-2A is revered among audio pros and this hand-built reincarnation faithfully matches its characteristics. ...they EQ all the warmth and low mids and bass. The T4 cell’s primary components include an electro-luminescent panel and dual cadmium-sulfide photo resistors, one of which controls gain reduction, and the other the VU meter in Gain Reduction mode. The LA-2A Leveling Amplifier will produce essentially instantaneous gain reduction of over 40 DB with no increase in harmonic distortion. Shipped From. Little did he know at the time that his work on this Cold War-era project would spawn the Teletronix® LA-2A Leveling Amplifier — one of the most iconic compressors in history. In 1967 Studio Electronics (eventually renamed UREI), picked up Babcock's broadcast division, including the Teletronix brand. Though Universal Audio spent a long time perfecting the T4 for their hardware LA-2A reissue, its unique design wasn’t fully understood until UA began the research to model the LA-2A for the UAD Powered Plug-Ins platform in 2001. 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