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</html>";s:4:"text";s:23552:"The unique characteristics of the T4A electro-optical attenuator have been maintained. The average attack time is fixed at 10 milliseconds, but its unique release characteristic is what gives the LA-2A its definitive sound. Teletronix was sold to Babcock Electronics of Costa Mesa, California in 1965. That is, until engineers began to miss the slow, unique compression of the LA-2A and prices for used units started to climb. During a stint at KMGM in Los Angeles, he became frustrated with having to ride the gain to maintain a constant signal level on the air. UAD Hardware is … It functions as a VST Plugin, an Audio Units Plugin, an RTAS Plugin and an AAX Plugin. Some 40 years after its invention, the story of the Teletronix LA-2A continues to be written, but one thing that remains constant is … The Effectrode ® ‘LA-1A’ Leveling Amplifier is a high-end, studio-grade vacuum tube compressor in a pedal. Considering the mystique and the high prices being paid for certain vintage professional audio products (Pultec equalizers, Neumann U47 microphones and numerous others) it's no wonder that manufacturers are "recreating" many of them at a breakneck pace. The 2A-KT draws inspiration from the original Teletronix LA-2A leveling amplifier, which was first produced in the early 1960s. 124. If the signal is below the threshold, then the release will be faster. The LA-2 was the next iteration, featuring a larger VU meter than the LA-1, and the addition of the now legendary T4A optical attenuator photocell. Well maintained from private professional studio/collector. For the LA-2A, turret boards were placed in a long strip at the bottom of the chassis, helping tidy up the wiring inside the unit. The LA-2A was originally produced in the early 1960s by Teletronix, which was later acquired by Babcock Electronics Corporation. Teletronix LA-2A Leveling Amplifier. 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. Download UREI TELETRONIX LA-2A LEVELING AMPLIFIER SCH service manual & repair info for electronics experts. Three versions of the LA-2A were made until 1969. A uniquely accurate model of the legendary Teletronix™ LA-2A optical leveling amplifier. UAD Teletronix® LA-2A Classic Leveling Amplifier Plug-In. Three versions of the LA-2A were made until 1969. I was very curious about the future of the LA-2A, so I asked Bill Putnam Jr. if the advent of plug-ins has adversely affected the sales of the Universal LA-2A, since now people can easily put a digital LA-2A on every single track and the emulations are quite similar to the originals. It is these characteristics that have been greatly responsible … 30+ Joined Reverb. [2] The LA-2A was inducted into the TECnology Hall of Fame in 2004. 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. In 1958, Jim Lawrence founded the Teletronix Engineering Company in Pasadena, California, manufacturing broadcast products such as transmitter tubes, emergency tone generators, and full-scale radio transmitters. Universal Audio’s Teletronix LA-2A Classic Leveling Amplifier reissue provides the performance characteristics of the iconic original. limiter. Learn essential functions of popular tube and solid-state compressor varieties, and creative uses for your productions. It puts the silky, smooth sound of this highly desirable unit … Teletronix LA-2A Leveling Amplifier This is an original Teletronix Model LA2A (not the Universal Audio reissue) with original UTC HA-100X transformer (a key component that makes the original sound so … “Modern photocells are designed to be as fast as possible, but they don't have the right multi-stage response needed to sound like a Teletronix design,” explains Shanks. 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. Listing Ended. Universal Audio Teletronix LA-2A Leveling Amplifier. In 1967 Studio Electronics (eventually renamed UREI), picked up Babcock's broadcast division, including the Teletronix brand. TG's Collection. Reviews. 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. Please take a moment to review my edit . In 1967 Studio Electronics (eventually renamed UREI), picked up Babcock's broadcast division, including the Teletronix brand. Watch. Page 1. 4-710d Four-Channel Tone-Blending Mic Preamp w/ Dynamics. As the light gets brighter, the photo resistor’s impedance increases which reduces the gain. The very epitome of vintage vibe, this classic compressor has bathed many a track in its incandescent tube glow. CA-2A is a plugin emulation of the legendary Teletronix LA-2A hardware compressor. If ever there is an official "Audio Technology Hall of Fame", it will definitely include a shrine to the iconic Teletronix LA-2A. RARE Vintage Teletronix Limited Edition 1979-84 UREI LA-2A Compressor Limiter Reissue 1 #132 of 300. How does it work? Make an Offer. If compression is heavy or the signal is above the threshold for a long duration, then the release will be slower. Quick Responder. 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. This is an original Teletronix Model LA2A (not the Universal Audio reissue). Why has the LA-2A remained so popular for recording engineers of all stripes, even fifty years after its original design? Blast from the past : Teletronix LA-2A Leveling Amplifier. This timing of the release depends heavily on the length and strength of the incoming signal. Bring this coveted classic compressor to your host audio software. Autry’s fondness for the LA-1 was instrumental in its gaining acceptance. The fact that it offers 40 dB of gain from input to output allows it to also be used as a preamp and compressor. a pre-determined point, and due to its unique deSign, functions as a combined compressor and . This is classic opto-compressor, Which uses electro-luminescent panel and photoresistors to provide gain reduction. 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 White 2A Leveling Amplifier is based on a legendary vintage unit that is entirely tube-based. Inspired by the mother of all optical compressors, Klark Teknik set the bar high for its KT-2A JavaScript seems to be disabled in your browser. Exploring Additional Compressors and Equalizers (EQs) Teletronix LA-3A 3m 36s. “To say it was hard is an understatement,” says Universal Audio Product Manager Will Shanks, “We were asking a manufacturer to revert back to manufacturing methods that were archaic and a step backwards in the technology.”. It’s all about the slow, gentle, and versatile multi-stage release time. Message Seller. Preferred Seller. They continued manufacturing the LA-2A, swapping the original gray faceplate with a silver one. It’s hard to imagine people throwing away vintage tube compressors back then, but tubes were old technology and solid state was all the rage. 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. You must have JavaScript enabled in your browser to utilize the functionality of this website. From that frustration was born the idea of a “leveling amplifier.”. $3,900 + $75 Shipping. 3. In 1962, Lawrence reconfigured the LA-2 into the first LA-2A, sporting a gray faceplate and a change to the messy layout of the unit’s interior wiring. 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. 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. 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. LA-2As warm things up. 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.”. It uses an electroluminescent panel together with a cadmium-sulfide light dependent resistor to provide gain reduction, which in the LA-2A's own terminology is called the T4 cell. 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. 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. This optical attenuator, known as the T4, is what gives the LA-2A its gentle, program dependent optical compression, revered to this day by audio professionals worldwide. The inside of a T4A optical attenuator. “The heart and soul of the LA-2A is in the T4 cell,” explains Bill Putnam Jr. “All of the characteristics are right there. Soon these broadcast compressors began showing up in recording studios around the country. The LA-2A Leveling Amplifier will produce essentially instantaneous gain reduction of over 40 DB with no increase in harmonic distortion. LA-2A Leveling Amplifier by Universal Audio is a Virtual Effect Audio Plugin for macOS and Windows. As products like the LA-3A, LA-4, and LA-5 gained popularity, sales of the LA-2A slowed until it was discontinued in 1969. Jim Lawrence was born in 1924 and served in the Navy during WWII as a radar operator, studied electrical engineering and worked at JPL in his younger years, but he was also able to apply his skills to his true passion — radio and broadcasting. The Teletronix LA-2A was originally produced in the early 1960s by Teletronix, which was later acquired by Babcock Electronics Corporation. Users may notice that it takes quite some time for the meter to return to 0 VU (no compression) after a long period of heavy compression. The fact that demand is increasing even as the design recently passed the 50-year mark is a testament to the fact that the LA-2A truly is a studio legend. And unless you hit them way hard and make the tubes sizzle they don't really distort. By Computer Music (Computer Music) 09 June 2016. For manufacturing, Universal Audio located the special equipment originally used to manufacture the T4 back in the '60s, and had to requalify the manufacturer to make sure it could meet UA’s special production needs. Buy New. Featured Listing. Excellent. Outboard Gear. Let’s look inside the T4 optical attenuator, which is the heart of the LA-2A. By today's standards, the Teletronix LA-2A Leveling Amplifier from Universal Audio appears to be a rather primitive compression device. RealVerb Pro 9m 50s. This prompted two limited edition reissues — one in the 1970s, and one in the 1980s — and then a full resurrection of the LA-2A in 1999 by Universal Audio. An engineer by the name of Sid Feldman purchased an early LA-2 and showed it to the engineer on the hugely influential and popular Ed Sullivan Show. Watch Seattle rapper Grieves deliver a fiery vocal performance, showcasing how to create the perfect hip-hop vocal chain using UAD plug-ins and Auto-Tune. UREI TELETRONIX LA-2A LEVELING AMPLIFIER SCH. 3. TRANSFER: You may not rent, lease, lend, sell, redistribute, sublicense or provide commercial hosting services with the Software. Here, producer Marco Polo (Masta Ace, Scarface, Talib Kweli, Pharoahe Monch) offers tips on how to use Apollo interfaces and UAD plug-ins to move beyond samples and spur your own creativity. Listings Price Guide. The LA-2A Leveling Amplifier has only a single gain stage and is one of the simplest compressors to operate with two knobs: Gain and Peak Reduction. But, it wasn’t an easy task. The photocell and the physics behind it are what immediately result in the two-stage release.”. 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. No expense has been spared to bring that classic sound to your recordings. With painstaking care, every new LA-2A unit is point-to-point handwired at Universal Audio's Custom Shop in Santa Cruz, California, with every component carefully evaluated for authenticity. The properties of the T4 give the LA-2A its unique character by making it an entirely program dependent design. The LA-2A Leveling Amplifier has only a single gain stage and is one of the simplest compressors to operate with two knobs: Gain and Peak Reduction. The LA-2A has a sonic character that makes it sought after by many recording engineers. The T4 optical attenuator in the LA-2A is both program and frequency dependent, allowing the compression ratio to vary greatly based on the source material. Teletronix. My father purchased the product rights and the name Teletronix from Babcock Engineering in 1967, folding it into his Studio Electronics Corporation, shortly before … It required working with the original manufacturer to perfect it, to dial it in to the specifications of the original photocells from the 1960s. This shorter, cleaner wiring enabled the LA-2A to have a lower noise floor than its predecessor. Cakewalk has announced that is offering for free (limited time offer) its CA-2A Leveling Amplifier plugin for Windows and Mac OSX. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. 37. “Actually, we’re selling more of the hardware LA-2As now than we ever have,” Putnam replied. Klark Teknik pay homage to this a Service manuals, schematics, eproms for electrical technicians. “Our DSP research helped us understand how the original T4 worked at the quantum physics level. The VU meter may also be switched to show the gain reduction or output level. A unique electro-optical attenuator system provides instantaneous gain reduction with no increase in harmonic distortion (less than 0.5%). While the initial release time is about 60 milliseconds for 50% of the release, the following 50% happens gradually over a period of one to 15 seconds before the signal comes back to 100%. It has only two rotary controls, one for "Gain" and one for "Peak Reduction." 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. This site helps you to save the Earth from electronic waste! Los Angeles, CA, United States. In 1967 Studio Electronics (eventually renamed UREI), picked up Babcock's broadcast division, including the Teletronix brand. It responds especially well to the human voice in a way that inspires performance.”. 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. Learn more 4.3 out of 5, based on 8 Reviews. Type: (PDF) Size 136.4 KB. Classic Leveling Amplifier with Vacuum Tubes, Optical Attenuator and Midas Transformers. The LA-2A Leveling Amplifier is designed to prevent an increase in output level beyond . The fact that it offers 40 dB of gain from input to output allows it to also be used as a preamp and compressor. [3], The LA-2A is a hand-wired, tube-based compressor. Teletronix was sold to Babcock Electronics of Costa Mesa, California in 1965. The original LA-2A is revered among audio pros and this hand-built reincarnation faithfully matches its characteristics. 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 m… Simi Valley, CA, United States. CS-1 Precision Channel Strip 7m 22s. 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. The LA-2A Leveling Amplifier has only a single gain stage and is one of the simplest compressors to operate with two knobs: Gain and Peak Reduction. Lawrence drew from his background with military optical sensors to design a circuit which would “level” the incoming audio signal. Teletronix LA-2A Classic Leveling Amplifier (Legacy) 5m 30s. 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. 1965 Teletronix LA-2A Leveling Amplifier. Universal Audio’s Teletronix LA-2A Classic Leveling Amplifier reissue provides the performance characteristics of the iconic original. 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. I have just modified one external link on LA-2A Leveling Amplifier. When you put bass and drums in them they get fatter and bigger. No one else has it.”. In the early 1950s, Jim Lawrence, a young University of Southern California-degreed electrical engineer, was quietly asked to join Cal Tech’s Jet Propulsion Laboratory (JPL), where he was assigned the task of developing optical sensors for the Titan Missile Program. [1] Teletronix was sold to Babcock Electronics of Costa Mesa, California in 1965. The fact that it offers 40 dB of gain from input to output allows it to also be used as a preamp and compressor. His revolutionary idea was to create the world’s first leveling amplifier utilizing optical sensors. The effect is illustrated in Figure Note the, Jim Lawrence's first limiting amplifier was the LA-1, of, Turret boards were added to the LA-2A design, resulting in, Shortly after Universal Audio was refounded in 1999, the. In 1965, Jim Lawrence sold Teletronix to Babcock Electronics of Costa Mesa, California. 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. With painstaking care, every new LA-2A unit is point-to-point handwired in Scotts Valley, California, with every component carefully evaluated for authenticity. Shipped From. 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. Buy Used. The Teletronix LA-2A Leveling Amplifier is practically the definition of vintage audio gear. 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. 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. 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. “It’s inspiring to sing through psychologically. *LA-2A is a registered trademark of Universal Audio, Inc. Cakewalk’s products, specifically, the CA-2A T-Type Leveling Amplifier, is develope… A variety of cosmetic changes were made as well — including changing the metering switch from a multiposition toggle switch to a rotary switch. “It treats your signal so lovingly,” says Bill Putnam Jr., CEO of Universal Audio. Universal Audio Teletronix LA-2A Classic Leveling Amplifier Pro Audio. It's in excellent condition, very clean for its age. Teletronix LA-2A Leveling Amplifier. As the development of solid-state technology matured, UREI launched more limiting amplifiers with the patented T4 optical attenuator, but without the space-consuming tube-based circuitry. Let’s look inside the T4 optical attenuator, which is the heart of the LA-2A. As the input level decreases, the light dims and the resistor’s impedance decreases. The Teletronix LA-3A Solid State Leveling Amplifier is the solid state successor to the well known Teletronix LA-2A. 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. Classic automatic gain control. UAD Teletronix® LA-2A Classic Leveling Amplifier Plug-In When you buy products through links across our site, we may earn an affiliate commission. One got into the hands of the legendary singing cowboy Gene Autry, who loved it and used it for his radio program and recording sessions. In 1967, Bill Putnam’s company, Studio Electronics (eventually renamed UREI), picked up Babcock’s broadcast division, including the Teletronix brand. 2015. If you watch the listing, we'll notify you if it becomes available again. In addition to adding support for VST compatible DAWs, the CA-2A T-Type Leveling Amplifier also includes side-chain capability allowing the compressor to react to program material from one track, and apply it to another. The Teletronix LA-2A: an original 1962 unit will set you back four grand. Sales. His first leveling amplifier was the Teletronix LA-1, of which only about one hundred units were ever made. Second Hand Sam Guitars . The optical sensor T4 variant we worked to develop is customized for us. With the LA-1A Effectrode employed a parallel tube plate design and they claim the LA-1A is "technically the quietest pedal or studio leveling amplifier ever made”.This tube plate design is the type of tube circuitry only ever found in high-end tube phono preamp stages for turntables. “The photocell is really hard to get right,” recalls Bill Putnam, Jr. “For our reproduction, we had a challenging time developing that part. 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]. 100% functional. The LA-2A was inducted into the TECnology Hall of Fame in 2004. Compressors and Limiters. As the input signal increases, the light panel gets brighter. Teletronix LA-2A Leveling Amplifier Vintage Tube Compressor Limiter. 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