Well, I just picked up some JBLs myself
a pair of these: http://www.jblpro.co...ctype=3&docid=592 PRX515s. Paid 625 each... 500W RMS (400 driver, 100 horn). You'll never run out of power and they're very difficult to blow. Ran them in one of the city parks for an event here a couple weekends back, worked very well for a crowd outdoors of nearly a thousand people; nobody had any trouble hearing anything (that was coming out of the speakers, that is).
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Excellent boxes, those!
great sound and power. Used predecessors for dj activity in former life.
Sure, understanding today's complex world of the future is a little like having bees live in your head. But...there they are.
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Yeah, they sound freakin' great.
Really good dynamic range, nice flat response... vocals sound fantastic through them.
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Heh.. shades of the Crown DC-300 ('60s)
Virtually a small Op-Amp scaled-UP -- it was almost bullet-proof with a local rock group I sold one to.
Guess they patented the design: Class-D, Crown® digital amplifier DC-300 was, indeed DC --> way beyond 20 KHz, very low IM, THD ... though golden-ears types deemed it maybe a tad "glassy" ... but then, they were comparing with Marantz and similar icons du jour. (Some used these at the 'DC' end: to run shaker tables and such. Great before bass-cubes became a commodity: for those 5 Hz earthquake tapes and other tomfoolery..) |
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What was their RMS rating?
I'd be surprised if that was the design principle used for the class D stuff... but it's true that I don't really know the design history of that stuff.
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Hey.. inducted into a 'Hall of Fame'!
150 W/ch X 2, rms at [forget.. "low"] THD, IM.
Seems that the DC-300 was inducted into the TECnology Hall of Fame [?] in '07, 40th anniversary of intro: http://www.crownaudi...m/press/pr157.htm 'Twas a heavy rack-mount-sized beast and, at $~680 in '67: cost Lots in the day. I was a Crown dealer; sold a few Crown prof. R-to-R tape recorders (one to the US Navy!) and a few DC-300s, but was then winding down this avocation. The build quality was excellent, near- Tektronix or hP grade.
PS: I have a pristine Crown IM Analyzer, Model IMA + perfect manual copy, available for a pittance (it also wasn't cheap in the day, though I snagged it off of eBay a few years back. Never used it.) |
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Re: Hey.. inducted into a 'Hall of Fame'!
Well, I might actually be interested in some of that hardware... I'd really like to get an oscilloscope sometime so I could check out what's coming out of my guitar amps (I've got some nicely old ones, and they're all old tech). It's a great way to figure out just exactly where the signal starts to break up...
150W is pretty loud, but I bet it would have a hard time delivering the vocals in competition with a 50W tube guitar amp. Actually, I've got a far descendent of that; it's a Crown 802 XLS, develops 500W/side RMS at 8 ohms. If I bridge the amp, I can get it up to 1600W@8Ohms. Great amp, sounds great, but it weighs a ton (well, close to seventy pounds). I use it to drive the three JBL JRX112Ms that I have. I used to use two of them for FOH and one as a monitor for whoever was singing, but now that I've picked up those two powered enclosures I can go to running three monitors and two monitor mixes. All I need now is a sub running between 800-1000W, and the fundamentals of my PA are complete... mwahahahaaaaaa :) |