Crown Audio by Harman

Search:     Advanced search

What does 'VZ' stand for in the MA-3600VZ and MA-5002VZ amplifiers? What does it do?

VZ means Variable Impedance and is the name of Crown's patented articulated power supply technology. VZ technology enables Crown to pack tremendous power into small rack spaces.

Background: A power supply must be large enough to handle the maximum voltage and current necessary for the amplifier to drive its maximum rated power into a specified load. In the process of achieving this requirement conventional power supply designs produce large quantities of heat, are heavy, and take up precious real estate. It's no secret that heat is a power amplifier's greatest destructive factor. The larger the power supply, the more heat the output stage will be required to dissipate. An articulated power supply, like VZ, can bypass much of this dilemma by reducing the voltage applied to the transistors when less voltage is required. Reducing the voltage decreases the heat. Subsequently the amplifier runs cooler allowing more power to be safely packed into the chassis. The VZ supply is divided into segments to better match the voltage and current demands of the power output stage. Bear in mind that audio signals are complex waveforms. The average level of music is always much less than the peak level. This means a power supply does not need to provide full voltage all of the time. The VZ supply is divided into two parts. When the voltage demands are not high, it operates in a parallel mode to supply less voltage and more current. The power transistors stay cooler because they are not forced to needlessly dissipate heat. This is the normal operating mode of the VZ power supply. When the voltage requirements are high VZ switches to a series mode to produce higher voltage and less current. The amplified output signal never misses a beat and gets full voltage only when it requires it. Sensing circuitry observes the voltage of the signal to determine when to switch VZ modes. The switching circuitry is designed to prevent audible switching distortion to yield the highest dynamic transfer function-the customer hears only the music and not the amplifier. You get not only the maximum power with the maximum safety; you also get the best power matching to your load.

Others in this Category
document How do I wire my Speakon connector?
document What is Crown's warranty?
document I want to send my Crown amplifier to the factory for service. What should I do?
document What are PIP Modules?
document Which Crown amplifiers are IQ compatible?
document What does ODEP stand for?
document What is TLC?
document What is IOC?
document What is the CLIP Indicator on my amp telling me?
document Why the 20A and 30A AC connectors, and can I get an adapter to connect to a standard 15A outlet?
document What is the output power rating of my Crown amplifier?
document Can I run one channel of my Crown amplifier at a different impedance than the other channel?
document Should I have the level controls on my amplifier turned all the way up?
document How do I determine the best input sensitivity setting?
document How can I parallel the inputs of my Crown amplifier with the same signal?
document How much "inrush current" will my amp draw during turn on?
document How can I get rid of the noise in my system?
document What is Damping Factor?
document What gauge speaker wire should I use in my system?
document Should I use vented spaces between my amplifiers?
document How can I augment the cooling of my amplifier racks using external fans?
document Why are there so many different Crown amplifiers to choose from?
document Should I use Bridge Mono or Parallel Mono?
document How do I set up my Crown amplifier to operate in Bridge-Mono?
document How do I set up my Crown amplifier to operate in Parallel-Mono?
document Which pin is hot (non-inverting) on a Crown amplifier?
document Where can I find retail prices for Crown products?
document Why does my CTs amplifier show 100% ODEP with USP2 and USP2/CN Cards?
document What are the compatibility issues I need to worry about with IQ-PIP modules?
document How do I purchase Crown Products?
document Isn't Class-I just like other amplifier classes?
document How does Crown measure power?
document If I use I-Tech and Macro-Tech to power a stack, do I have to worry about any delay or time alignment?
document What PIP modules are compatable with what amps?
document How do I update the firmware in my CDi, DSi, or XTi amplifier for use with System Architect?