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RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 1 Celebrating the Crown Macro-Tech Series Y our Macro-Tech Signature Series amplifi er is the culmination of a long heritage of Crown products and design ideas that began in the early 1970s. In these pages you can explore how the Macro-Tech Series came to be, understand its advanced features, and enjoy stories and sales literature from its colorful past. RadioFans.CN 收音机爱 好者资料库 2 S ometimes a product fi ts an application so well, it is deemed a classic. The term is synonymous with the Crown Macro-Tech Series of power amplifi ers. That product line, and its predecessor Micro-Tech, sparked innovative technologies that provided lower distortion, less thermal stress, higher output power, greater reliability, more power density and superior audio quality. No compromises, no gimmicks. Just brilliant engineering backed by superior manufacturing, support and an unsurpassed commitment to quality. Like all Crown amps, the defi ning characteristic of the Macro- Tech Series is sonic accuracy. A tight, rock-solid low end, with smooth, detailed highs and a well-defi ned midrange. In short, Crown Macro-Tech Series Enjoy! the most accurate reproduction of an audio signal youve ever heard. And because we put the quality of sound above all else, Crown amplifi ers are the most coveted in the business. When it comes to manufacturing amps, our work is based on one simple fact: there are no shortcuts to quality. And our Macro- Techs have proven this time and time again in some of the most demanding applications in the world. For this special, limited Macro-Tech release, we wanted to bring you more than just the typical operation manual. This brochure goes much further, delving into the Macro-Techs development, design philosophy, and advanced technical features. Weve also included some brochures from the past, a bio of Crowns chief R they used a lot of Micro-Techs. We had a relationship with them. They would fi nd any problems fi rst and then wed fi x them.” Eventually Clair Brothers bought Showco. Now they are using over 2000 MA-3600VZs. The MT-700 (never released) was the fi rst Micro-Tech amp. Then came the MT-1000 which provided 1000 watts into 2 ohms. Next was the MT-1200 which produced 1200 watts, thanks to bigger power transformers. The technology in Micro-Tech products helped Crown develop amps for Magnetic Resonance Imaging (MRI). General Electric asked Crown to make amplifi ers with more voltage and current than what was available. We created bigger amps for GE, such as the 7780, using JTS and Grounded Bridge. An early sketch by Jim Wordinger showing a proposed chassis layout of a pre-Micro-Tech power amplifi er. 9 Macro-Tech Building on our experience with the MT series, Gerald and Jim developed the Macro-Tech Series in 1987. It added Plug- In-Processors (PIP cards) and offered a better appearance. Jim Wordinger remembers, “In the early days wed compare MA amplifi ers side-by-side with competitive amps. Ours had more punch and deeper bass, which I attributed to more output voltage and current.” The huge Macro-Tech 10,000 amplifi er was basically an MRI amp modifi ed for audio use with a new audio interface and front panel. It was developed for John Royer and Tom Allebrandi who did sound for the Indianapolis 500. Three of these amps were modifi ed to drive the race tracks 240V distributed-speaker system replacing two huge war-surplus amplifi ers from a battleship. “We supplied the fi rst Macro-Tech prototypes to John McBride of MD Systems, doing a tour for Garth Brooks. At one gig, the FOH engineer noted that he had to keep pushing the level up in the midrange. The problem wasnt with the amps. Actually, MD had burned up two-thirds of the midrange drivers because they werent used to seeing that kind of power. Crown shipped in 24 drivers, installed them, and wired them differently. Problem solved. Thats the kind of support Crown would do.” Crown Macro-Tech 10,000. .they werent used to seeing that kind of power.” 10 In 1992, Crown engineer Andy Archias worked on the MA-5000. Crowns upper management was delighted that the amp had such a positive impact on the company, the music industry, and the audio world. MA-5000s were even used on destroyers and aircraft carriers (and still are today). A major supporter of MA amps was Sam Helms, manager of Sigmet, a premier pro audio representative in New Jersey. Sam put Crown amps through all sorts of torture tests. As he says, “We put low-frequency square waves into the amp and drove a subwoofer with that signal. This was to show how the MAs damping factor controlled speaker-cone motion compared to the competition. It was no contest.” “Using a signal generator, we put 60 Hz in the front end of the amp, ran the level controls up, got high-power out of the amp and welded pieces of metal with it! Or wed take an AC cord, cut off the end of it, put on a banana jack, plug it in the back of the amplifi er, and run a drill off it. The competition would shut off and the Crown amp would just keep going. You could drill through a 4x4 with no problem at all.” Crowns elite studio amplifi er, the Macro- Reference, used the same main board as the MA-3600VZ, but with remote load sensing for higher damping factor. It was the best-measuring MA-5000s are used on destroyers and aircraft carriers.” amp Crown ever made. Around 1992, Crown introduced the MA-24x6 and MA-36x12 amps with a different power rating in each channel for bi-amping woofers and horn drivers. VZ technology (with bi-level power supply switching) was fi rst prototyped in an MA-1200. It was feared that the switching would affect the audio, but that did not happen. The fi rst bi-level amps were MRI units custom-made for Picker International, a medical imaging company. Jim Stembel, Crowns International Business Development Manager, recalls: “At the trade show in which we introduced the MA-3600VZ, it was the fi rst amp with that much power in two rack spaces. One of our biggest competitors asked, Why put all that power in two rack units? We replied, Because we could. That power density was unheard of at the time. It was quite a signifi cant landmark.” “When we introduced the MA-5000, one of our major customers asked, Why does anybody need that much power? Again it was an amplifi er ahead of its time it was so large compared to anything else on the market. At the time, nobody appreciated the power of the MA-5000. Of course, the MA-5000 has gone on to become a wildly successful amp in touring sound a standard. They really were trend-setting amplifi ers.” 10 years ago in Pro Sound News, a poll reported that 9 out 10 of the major tours used Crown, mostly MA amps. We still have die-hard customers who refuse to use anything else. So, starting with Grounded Bridge, invented in 1971, and JTS, invented in 1974, those two key pieces of technology enabled the Micro-Tech and Macro-Tech family. After a long lifetime, most of those products are still running. Thats what we think they should do. 11 About Gerald Stanley T he mastermind behind the Macro-Tech Series, and all Crown solid-state electronics for over 40 years, is our senior vice president of R Grounded Bridge, PIP, and PIP2 are trademarks of Crown International. System Architect and JBL are used for information only and are the property of their respective companies. Crown Audio, Inc. reserves the right to make changes in specifications, software, or products without prior notice. Crown Audio, Inc. also assumes no responsibility for any error in type or print reproduction of the features or specifications in this literature. The information provided here was deemed accurate as of the publication date. However, updates to this information may have occurred. For the latest in product information, please visit the Crown website at . Some models may be exported under the name Amcron. 2008 by Crown Audio, Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000 140623-1 01/08