Originally Posted by NWCgrad
The specs provided for QSC speakers on their website are pretty lame. No XO point given (exception is the theater speakers) and the best freq resp rating is -6 dB and the second set is -10 dB. I had interest in QSC as I really love their amplifiers, but the lack of data on the speakers is an issue for me.
They don't have a 5 million dollar spinOrama machine that takes 92 points of measurements in 15 minutes and creates a sound curve, freq response, off axis, first and second reflections, total sound power, distortion, etc...
The propagation of QSC speakers in the professional arena is mostly a result of brand loyalty and availability and a trickle over effect from their high percentage and dominance in professional cinema amplification and DSP. QSC is much more dominant in amplifiers and in the digital signal processing for commercial cinema and most of the "PRO" guys likely use simply because they use that other stuff, and naturally you'll recommend what you use. QSC makes all the tech and gear for cinema servers and stuff, so they have their foot already in the door. The use of their speaker is not due to superior performance.
I've never seen any reliable data showing QSC is superior to JBL products. Subjective recommendation and feedback are less than worthless in terms of reliability and correlation to actual reality. I would never put my money on a product that was backed only by word of mouth on the street.
The true answer is individual people will find and manifest their own reasons to like one brand over the other but little of that created opinion actually related at all to the reality of speaker performance of either brand. Both brands make quality products that can work.
My gut tells me the Harman stuff is better measured, and for that reason I would choose JBL. I find comfort in giving my money to a company that holds the importance of accurate measurements of paramount importance. The active JBL screen array products paired with DSi amps should theoretically have the ability to be flat within a very small tolerance (1db, 2db etc). The bonus is in the DSP and active design.
I would think QSC if using an active design would have a similar result possible. For the best and most certain outcome you would need to measure and calibrated them. Both brands can work equally well.
I'll also point out listening to a QSC versus a JBL in a retail store, and using a pro audio product, is more than 100% worthless in forming an opinion of either the QSC cinema speaker or the JBL Cinema speaker. You can't generalize about an entire company product line from such an event.
You could essentially flip a coin and be ok in your choice. I think both are quality products. The reasons why I trust Harman product is service, availability of accurate measurements, and the scientific research they've done over the years. I have a lot of respect for how JBL PRO does things and engineers loudspeakers. No hate on QSC but they've lacked the science studies and proprietary engineering, the patents, and a lot of the tools and resources that JBL PRO has access to use under the JBL umbrella.
Saying the 4722 is old is also pointless. For a company like JBL PRO to re-engineer or improve or replace a product like that is not a big deal. Look at how many patents they got granted last year alone on the new driver technology and M2 waveguide. (9 patents in 2013)
They have access to actually engineer their own drivers for whatever design they want, and they hold more loudspeaker patents than anyone else so they essentially have everything at their disposal. They have high tech 3D printers that can manufacture a part on the spot if they need it. If they have not found any reason to change it, or improve it, or discontinue it- that probably means that's because the design works. That's actually a reason to choose that product IMO.
I think QSC was late to the cinema speaker world and kind of made something with what they had available. My understanding was they hired Paul Hales to come in and help design their speakers. He know owns Pro Audio Technology
who makes some pretty big daddy and bad ass speakers too. He's not an idiot or new to speaker design so even with the lack of measurements my gut also tells me the QSC product is good.
Like literally flip a coin. Both are great.
Since Lemonslush already has a stack of CROWN DSi Digital cinema amplifiers that match up to the JBL screen array speakers it kind of seems stupid to sell those off and switch to QSC amplification. Even if QSC ampification is "better" it's just a total extra expenditure for such a trivial gain. Practicality should rule the day here. If using passive, I am of the believe that a passive of either system would be inferior to an active of the alternative. So that's a dead end too.
Conclusion- QSC is great. Buy the JBL.