JBL PRX600 series User Manual page 12

Differential Drive Transducers
Extended frequency response, high power output and low distortion are hallmarks of all JBL transducers. Our tour
tested, tour proven and patented Differential Drive® technology delivers all this performance in a dramatically lighter
package. With the neodymium magnet positioned inside the dual-coil/dual-gap voice coil, heavy steel pole pieces are
eliminated. And the heat sink is the chassis itself, further lowering system weight while ensuring consistent, reliable
performance.
Intelligence provided by Crown and dbx
The PRX 600 Series integrated digital power amplifiers were developed specifically for JBL by Crown®, the most
trusted name in professional sound reinforcement amplification for over 45 years. The Class D amplifiers are high
powered, low distortion and lightweight, ensuring faithful audio reproduction while conforming to our strict "maximum-
performance to weight ratio" design guidelines. Additionally, we've integrated the award winning dbx® Type IV™
limiter circuit on the inputs to guarantee signal integrity. We further optimize the system performance through the use
of sophisticated Digital Signal Processing for EQ, crossover, amplifier control, and protection. This is the Harman family
working together to bring you the best in world-class audio technology.
Versatile
Professionally discreet in appearance, the new PRX models are appealing to any musician, entertainer, A/V rental
company or commercial facility looking for superior audio performance in a professional yet affordable package. We've
included suspension points for light-duty commercial installation and a two position pole mount for convenient stand
use. And as compared to their predecessors, the PRX500 Series, we've also reduced the size and weight making
these speakers truly portable and ultimately manageable.
Powered Speaker Systems
A Closed System Architecture...
There is much confusion these days in the world of powered speakers especially when it comes to defining
"performance". What constitutes "exceptional performance"? Is it wattage ratings, driver dimensions, cabinet
dimensions, sound pressure levels, tone? It can get very confusing when you're confronted with a barrage of
specifications from manufacturers all claiming to have the "best performance".
A self powered speaker is really a "system" unto itself – it's a "closed system". Unlike a passive speaker, amplifier
and signal processing chain where components can be interchanged or upgraded, the powered speaker is a "closed
system" that operates as a single unit. Properly designed, all of the components are chosen to work together,
complementing each other to create an environment where the whole is greater than the sum of the parts. The cabinet
volume needs to support the mechanical performance of the speaker which is impacted by the power amplifier's
performance which, if there is Digital Signal Processing on the input, is affected by the DSP programming. Some
manufacturers simply stick an amplifier on an existing speaker cabinet and call it a "powered speaker" (technically
correct) while more experienced companies, like JBL, spend hundreds of man hours optimizing the relationship
between the components in order to maximize amplifier and speaker efficiency, spectral balance, tone and
dependability. Here at JBL we not only work hard on the system but on our proprietary components as well. Products
like Differential Drive® speakers for example are patented designs born from years of dedicated research and
development into acoustical and transducer science. No one else has access to this technology and Differential
Drive® speakers have been tested on worldwide concert tours for years.
Harman Professional "Green Edge™" Mission
At Harman Professional we understand and respect that we have a duty to serve our customers and our employees
by serving the planet. We accept that responsibility and strive to be energy efficient and environmentally minded in
our everyday business. When we design, produce, and deliver our products we look for opportunities to do so more
efficiently and sustainably. We're committed to a healthier planet and healthier life for every living thing.
JBL is proud that PRX600s have been certified "Green Edge" compliant by Harman Professional. We've reduced the
weight and size from the PRX500 Series and we're using only renewable materials in the packaging. We've not only
lowered our Carbon Footprint, but the CF of any one who purchases them.
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