I am absolutely a JBL control room monitor lover. I actually have a pair of 4310's, a pair of 4311's a pair of 4312's, a pair of 4411's. I've had others. To me, they are the proverbial rock-and-roll mixing speakers. Sure, I have a couple of powered monitors lying around but I keep going back to my old 4300 series plover & over again. I love them. They love me. After all, I have six pairs of them! But you absolutely must make sure that you are purchasing one of JBL control room series of monitors and not make the big mistake by purchasing one of their consumer-products. Absolutely not the same and no relation in any way.

You can get both passive & active monitors from JBL.

I like mine powered by Crown Amplifiers.
Ms. Remy Ann David

the guitar center employee was explaining to me that the monitors have an automatic room analysis function.. or something like that.. That wouldnt fall under the category of a consumer product would it?

No, those are "active" (internally EQ'd and powered) "professional" studio monitors.

I think their room correction isn't the best out there. Someone correct me if I'm wrong, but I thought that JBL finds one troublesome frequency and helps it. Many other room correction software and monitors find more than one troublesome frequency and helps them out.

I wouldn't use room correction as part of your reasoning in purchasing a monitor.

Room correction is a consumer level idea as well. Many home theater surround sound receivers implement such.

MrPhaSe wrote: the guitar center employee was explaining to me that the monitors have an automatic room analysis function.. or something like that.. That wouldnt fall under the category of a consumer product would it?

My GC must be slack, i have never saw any JBL monitors in the store room, I would love to hear them.

I bought a pair of these a couple of months ago, they are awesome. I got a pair of 4326p's with a matching 12" Sub.
I used to have a pair of KRK RP6's and when I compared them, the JBL's sounded a lot clearer in the top end.

They have analog and digital inputs (AES/EBU XLR, S/PDIF RCA).
The Room Correction Mode thing is ok, but I think they sound better without it.

They also come with a remote control which is handy.
If your going to buy them, get the sub too, it's worth it.

I have a pair of the JBL LSR 4328 professional self-powered monitors that I use for remote recording situations. And in the make-shift spaces I often have to work in, the JBLs have sounded great. I've found the sound to be very tight and well defined in a slew of weird places. It's very reassuring to run them through their set-up and play familiar tracks through them while I finish cabling things up, and finding they sound just like you expected - no matter what size or shape of room you're in.

The RMC seems to do a nice job in the different environments I've used them in. The RMC is Room Mode Correction, so it's not like pink noise full-spectrum analysis, it's looking for the lowest problematic modes. In the assortment of rooms I've been dealing with; taking those muddy, standing-wave frequencies out really makes the rest icing on the cake. And back to the case at hand the LSR-4328 or 4326 are near-field monitors, so unless you're in a ridiculously bright room, once the bass response is properly dealt with, you'll either like the way your mids and highs sound, or not. I travel with foldable foam gobos for behind the mix position to eliminate some excessive reflections and I happen to like the JBL treatment of mids and highs. If not perfect, I find them to be very predictable and consistent - which when you get down to it, that's really what I'm after. Because more often than not, it's the bass response that will lie to you when you're trying to mix in unfamiliar conditions - in my opinion.
And if you skulk around the studio-construction area here at recording.org, you already know the problems caused by Room Modes and having speakers that can squelch out those problems with no significant side-effects in just a few seconds is insanely useful (to me at least).

And to address fourone3's concern about them correcting just one frequency, he's absolutey right.

From the JBL Spec Sheet:
The RMC computer listens to 73 frequencies in the 20 to 160Hz range (1/24th-octave centers) with a variable Q from 1 (1.4-octave bandwidth) to 16 (1/11th-octave bandwidth) and then applies attenuation of 3 to 12 dB in 0.25dB increments.

It will "listen" to all those frequencies, but will just jump all over the lowest/strongest mode and put a notch there at whatever Q width it calculates to be best. It's a simple solution with way above average results.

If you want fullrange EQ, you'll have to find another method to get perfectly flat from 20Hz - 20kHz. It will not Auto EQ like some other products. The software allows some for some full-spectrum tone control, in the form of a 2-band High and Low shelf EQ with selectable "corner frequencies". But that is intended for contour and would never replace a full 1/3rd octave approach.

More Spec Sheet Data
LF EQ: Factory Default: 500 Hz Shelf, +/- 2dB in _ dB increments.
137 corner frequencies between 19.7 Hz and 1kHz accessible

HF EQ: Factory Default: 2kHz Shelf , +/- 2dB in _ dB increments 104
corner frequencies between 1kHz and 20.2 kHz

There are some pieces of equipment in your rig that you will base a lot of mix decisions on, ALWAYS try to find a way to demo them before you buy - in your recording / mixing space if possible. Monitors definitely fall into that category. These have worked great for me, but may not be right for you. (somebody cue the theme from "Different Strokes"...) whatchoo talkinbout Willis?

FYI
In the interest of 'full-disclosure' I do a lot of business with JBL. But I can assure you the opinions expressed are my own honest assessment of the product specified. I have no interest in trying to sell anybody here anything, so I have nothing to gain financially. If I were unhappy with them, I'd talk all day about that instead. In keeping with the holidays - these easily made my "Nice List" ... if somebody wants to know what manufacturers / products have made my "Naughty List", I'll let them know when the appropriate thread comes up.