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Содержание Macro-Tech 2402

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Страница 3: ... 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 ...

Страница 4: ...st accurate reproduction of an audio signal you ve 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...

Страница 5: ...3 Crown Macro Tech amplifi ers were used at the 64 640 seat Sangam Stadium in Seoul South Korea during the 2002 World Cup ...

Страница 6: ...kel Tour Maryland Sound Gemini Sound On Stage Audio Enterprise Live STADIUM ARENA American Airlines Arena American Airlines Center Ralph Engelstad Arena Key Arena Xcel Energy Arena Conseco Field House Coors Field Volkswagen Stadium Hong Kong Stadium Racks of Crown Macro Tech amplifi ers power this 2001 extravaganza staged in Salt Lake City s Salt Palace for the Annual Gala held by Utah Governor Mi...

Страница 7: ...5 Crown Macro Tech amplifi ers power the premium sound system employing JBL PD Series speakers in the 400 000 sq ft Ralph Engelstad Arena in Grand Forks North Dakota ...

Страница 8: ...y changes its impedance to adapt to the signal voltage and current This technology permits large amounts of power in a compact package while achieving ultra low distortion and without generating excess heat How It All Began The brainstorming for this whole family began with collaboration between engineers Gerald Stanley and Jim Wordinger In considering the drawbacks of current power amplifi ers th...

Страница 9: ...rown Crown s president at that time Max Scholfi eld recognized that Crown s marketing needed to be shaken up so he hired Dr Clay Barclay to drive change in Crown s marketing and sales divisions Clay realized that the MI and Touring industries needed a product like this and he sold the idea to Crown and to potential customers A 1983 schematic by Gerald Stanley of the Grounded Bridge circuit ...

Страница 10: ... design goals Showco was one of our fi rst customers they used a lot of Micro Techs We had a relationship with them They would fi nd any problems fi rst and then we d 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 ...

Страница 11: ...m Allebrandi who did sound for the Indianapolis 500 Three of these amps were modifi ed to drive the race track s 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 midrang...

Страница 12: ...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 Crown s International ...

Страница 13: ...lifi er Only a few were made They were unreliable using only high speed fuses for protection The SA 20 20 was a 1 rack space amp that soon became the SA 30 30 The SA 20 20 used smaller versions of the SA 60 60 output devices The 60 60 was DC coupled throughout and the 20 20 was AC coupled at the input The DC 300 was not the fi rst DC audio amp but it was the fi rst that was reliable Gerald went on...

Страница 14: ...ed intelligent circuitry to simulate the instantaneous operating conditions of those output transistors Its name describes what it does Output Device Emulation Protection or ODEP It not only simulates the operation of the output transistors but it also compares their operation to their known SOA If more power is about to be asked of the output devices than they are capable of delivering under the ...

Страница 15: ...ry is not center tapped This allows the power supply to deliver VCC and VCC from the same bridge rectifi er and fi lter as a total difference in potential regardless of their voltages with respect to ground Composite output devices are arranged to function as gigantic NPN and PNP devices Each output stage has two composite NPN and two composite PNP devices The devices connected to the load are ref...

Страница 16: ...o pack large amounts of power into a compact package while achieving ultra low distortion and without generating excessive heat An amplifi er power supply must be large enough to handle both the maximum voltage and maximum current the amplifi er needs to drive its rated power into a specifi ed load In order to meet this requirement most conventional supplies are heavy large and produce lots of hea...

Страница 17: ...eaker impedance ratings are only approximations Without ILoad ILimit you have to do some lengthy calculations to approximate the maximum number of loudspeakers you can drive with the amplifi er and this does not allow for a 4 ohm loudspeaker whose impedance drops below 2 ohms at 80 Hz This is why your amplifi er has ILoad ILimit The ILoad function turns a channel s ILoad ILimit indicator green whe...

Страница 18: ...he Crown Amplifi er Application Guide available online at www crownaudio com PIP Modules PIP Programmable Input Processor modules provide features that can be added to customize the amplifi er PIP modules plug into the connector inside the back panel of the amplifi er Features range from error driven compressor limiters to remote control and monitoring via System Architect or IQwic Your amplifi er...

Страница 19: ...riable Impedance MA 3600VZ and MA 5000VZ quickly become the touring standards MA 24x6 and MA 36x12 for bi amping are introduced 1999 MA 602 1202 2402 and MA 5002VZ Crown Amplif iers Time Line VZ theory for electronics savvy readers VZ offers a simple way to apply Class H operation to a Grounded Bridge circuit Class H changes the power supply voltage from a lower level to a higher level when larger...

Страница 20: ...18 A page from Audio Engineering Society Preprint 959 N 1 What Watt in Amplifi er Testing by Gerald Stanley and Robert McLaughlin An early sketch of a Micro Tech schematic by Jim Wordinger ...

Страница 21: ...st data from 1984 and 1986 Harman Pro Group President Blake Augsburger left and Crown President Mark Graham right display Gerald s latest patent plaques in a recent Crown assembly meeting A mid 1960s shot of Gerald Stanley ...

Страница 22: ...ng and service is what makes Macro Tech the choice for professional sound reinforcement Versatile Earth Shaking Power No other amplifi er can give you as much versatility in delivering earth shaking power as Macro Tech Through the patented Grounded Bridge circuitry and Multi Mode A AB B circuitry each Macro Tech can drive high output levels into massive loads while achieving the lowest distortion ...

Страница 23: ...ce that it detects a variation of 0 05 percent or more it fl ashes the IOC indicator of the offending channel The IOC indicators help you troubleshoot the source of distortion by showing you where it s not your Crown amplifi er P I P Compatibility All Macro Techs are P I P Programmable Input Processor compatible These circuit card modules plug into a P I P connector on the rear panel of the amplif...

Страница 24: ...y are using Crown equipment Our technical support staff is unequaled for friendly knowledgeable service and are within a phone call s reach They re well versed with all aspects of Crown amplifi ers and offer a level of support unsurpassed in the industry To ensure we achieve our standard for providing the very best product possible we manufacture our own circuit boards form our own sheet metal and...

Страница 25: ...Macro Tech brochure and a Crown newsletter article about the Macro Tech 5000VZ We hope you ve enjoyed this journey into the exciting past of the Crown Micro Tech and Macro Tech Series amplifi ers that are world renowned for their technical innovations reliability and superb sound ...

Страница 26: ...r 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 www crownaudio com So...

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