July 9, Has JBL done the impossible and overcome the bitter and twisted prejudices of this hard-bitten industry veteran? It was completely dominant. But, as we know in this market sector, the status quo never lasts too long. We got on well… and we also got on well with the JBL boxes.
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July 9, Has JBL done the impossible and overcome the bitter and twisted prejudices of this hard-bitten industry veteran? It was completely dominant. But, as we know in this market sector, the status quo never lasts too long.
We got on well… and we also got on well with the JBL boxes. These boxes look the goods. In fact, at first glance, they look remarkably like very large computer speakers! Put a pair in your study and see how you get on. The result is a very impressive, distortion-free sound. Two separate W amps drive the two 15s, while the horn is driven by a W amp. And with all that artillery, the damn thing only weighs 38 kilograms!
Seriously impressive stuff. The power rating is W. At the urging of the irrepressible Peter Twartz, I removed the speaker from the box and took up his dare to extend my arm and hold the inch speaker up with one finger. Yeah, right, Pete! But behold, he was correct and I was and still am dumbfounded! The neodymium magnet structure and aluminium basket make the drivers super light, which inevitably contributes to the overall low mass of the cabinets.
The S features a digital crossover, which is set at Hz. Most inch subs are crossed over at around 80Hz to get some thump and air movement. I would have preferred to have some control over the crossover frequency via an increment button or some sort of optional interchangeable card method, but JBL has done this to prevent tampering by the unskilled — for good reason, perhaps.
The sub has a pole mount adaptor and weighs only 36 kilograms. However, the horn does its job very well within its parameters, and demonstrates some excellent throw. I walked 40 metres away from the PA stack into an adjacent room and I could still hear the band clearly. I ran both the subs flat out and had the gain controls on the boxes running at the recommended line level unity gain setting.
The internal limiters seemed to be tolerant and preset intelligently. The PRX features a dual-input connector with a loop-thru output connector as well. The sub has two sets of connectors, left and right — very clever and sensible. And obviously necessary! The one bummer was the lack of loop-thru V power outlets. As anyone who knows me will be aware, I am not the No.
JBL PRX525 Powered PA Speaker
A propriety DSP chip is at the core of a fully featured input section, providing user selectable system EQ, protection, input sensitivity selection, cross-over functionality, dynamic limiting and discrete component optimization. If a simple set-up is required and full bandwidth output at high levels is a must, then the PRX is most likely the optimum solution. With the same foot print as the PRX the addition of another 15" woofer only increases the weight by 24 lbs, yet the increase in performance negates the requirement for an extra subwoofer in livemusic and many music playback applications. A microphone can be directly connected to the speaker input for quick on-the-fly PA applicaitons.
JBL PRX525 Manuals & User Guides
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