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Author Topic: JBL PRX or SRX  (Read 4431 times)

Josh Rawls

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JBL PRX or SRX
« on: January 11, 2016, 08:00:53 pm »

I'm close to pulling the trigger on new speakers. I've narrowed it down to JBL PRX or SRX.

Where I'm located it is difficult to get a live A/B comparison so I'm hoping some here have heard both and can give me some opinions. What I'm looking for is advice on the sound quality of the SRX over the PRX. Is it worth the price difference for wedding DJ use?

Thanks in advance for advice!

A few notes:

  • I primarily do weddings from 150-350 people. I also do school dances on occasion.
  • I already have a DR PA2 for DSP, so I don't necessarily need the DSP of the SRX line.
  • If I go with the SRX line I'm spit on the 818 or the 828. The weight and size is an issue on the 828 however the 818 offer more flexibility but at higher cost. Using two 818 coupled should be close to the same real-world performance of a dual.

System A: ~$9,000

2 - SRX812P
4 - SRX818SP

System B: ~$6,600
2 - SRX812P
2 - SRX828SP

System C: ~$7,300

2 - PRX712
4 - PRX718XLF
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Josh Rawls

Jamin Lynch

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Re: JBL PRX or SRX
« Reply #1 on: January 11, 2016, 08:03:55 pm »

There is a big difference between the PRX and SRX.

You should closely read the spec sheets. In particular compare the components of each
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Using: JBL VP tops, subs, and monitors, Si Performer

Josh Rawls

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Re: JBL PRX or SRX
« Reply #2 on: January 11, 2016, 09:45:41 pm »

I have been pouring over spec sheets for weeks now. I'll admit I know enough to be dangerous, which is why I am asking for advice.

I see both series use different drivers but the spec sheets for the PRX line don't give VC size for the drivers so it's tough to compare that. I searched the web for more info without much luck.

The specs I fully understand (Max SPL and freq. response -3, crossover point) aren't that different between the tops. I see the SRX goes higher and lower. The higher is just at the limit of most people's hearing. The lower would be covered by a sub. The only time the tops would be used without a sub is a ceremony. I'm not too concerned about really low frequencies there.

The main tuning frequency response chart for the SRX is obviously better compared to the normal chart for the PRX. I just don't know it is enough better for my purposes compared to the cost.

I definitely see a big difference in the subs. There isn't a big price difference there so I guess one question is could I do SRX subs with the PRX tops without a bunch of EQ to make them work well together?

One difference I do see in the balanced input impedance. PRX is 20k and SRX is 40k. I understand that higher is better as it won't affect the output voltage of the source as much, is that correct?

Obviously the DSP is much better on the SRX line, but would the DR PA2 with the PRX be just as good for DJ use?

I'll keep looking for a dealer here that can get me a A/B comparison.
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Josh Rawls

Scott Carneval

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Re: JBL PRX or SRX
« Reply #3 on: January 11, 2016, 10:10:17 pm »

It's truly a night and day difference. If you can afford the SRX I wouldn't even look twice at the PRX.


Sent from my iPhone using Tapatalk
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Dennis Wiggins

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Re: JBL PRX or SRX
« Reply #4 on: January 12, 2016, 07:38:36 am »

I'm close to pulling the trigger on new speakers. I've narrowed it down to JBL PRX or SRX.

Where I'm located it is difficult to get a live A/B comparison so I'm hoping some here have heard both and can give me some opinions. What I'm looking for is advice on the sound quality of the SRX over the PRX. Is it worth the price difference for wedding DJ use?

Thanks in advance for advice!

A few notes:

  • I primarily do weddings from 150-350 people. I also do school dances on occasion.
  • I already have a DR PA2 for DSP, so I don't necessarily need the DSP of the SRX line.
  • If I go with the SRX line I'm spit on the 818 or the 828. The weight and size is an issue on the 828 however the 818 offer more flexibility but at higher cost. Using two 818 coupled should be close to the same real-world performance of a dual.

System A: ~$9,000

2 - SRX812P
4 - SRX818SP

System B: ~$6,600
2 - SRX812P
2 - SRX828SP

System C: ~$7,300

2 - PRX712
4 - PRX718XLF

I would go with system A, but with just 2 818 subs initially. Add 2 poles to get the tops up high. You will be very surprised at the performance. 

You could always add 2 more subs at a later time if you still feel the need.

-Dennis
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Josh Rawls

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Re: JBL PRX or SRX
« Reply #5 on: January 12, 2016, 08:46:33 am »

I would go with system A, but with just 2 818 subs initially. Add 2 poles to get the tops up high. You will be very surprised at the performance. 

You could always add 2 more subs at a later time if you still feel the need.

-Dennis

I was planning on putting the tops on tripods or one on a tripod and one on a pole and coupling the subs when I used more than one. Although having a power alley on the dance floor wouldn't always be bad.
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Josh Rawls

Scott Carneval

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Re: JBL PRX or SRX
« Reply #6 on: January 12, 2016, 09:07:10 am »

I was planning on putting the tops on tripods or one on a tripod and one on a pole and coupling the subs when I used more than one. Although having a power alley on the dance floor wouldn't always be bad.

In that case I would definitely go with the 828 if you can handle moving them. You can add wheels and it turns into a difficult-but-manageable one-man job. The cost of two 818's just doesn't make sense if you can handle the 828's.
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Luke Geis

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Re: JBL PRX or SRX
« Reply #7 on: January 12, 2016, 09:24:04 pm »

SRX or bust
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Lyle Williams

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Re: JBL PRX or SRX
« Reply #8 on: January 13, 2016, 12:06:48 am »

SRX or bust

Yes.  Buying system c for more money than system b would be a unique form of lunacy.
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Josh Rawls

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Re: JBL PRX or SRX
« Reply #9 on: January 13, 2016, 08:15:15 am »

Yes.  Buying system c for more money than system b would be a unique form of lunacy.

The only reason I was even considering it was to get 4 single 18's at a lower price.

After taking a second look at the spec sheets, and reading the advice here and other forums, for the subs I've definitely decided on the SRX rig.

For now I'm going to get:

2 - SRX812P
2 - SRX818SP

The reason for the singles is portability and flexibility. Also, I'm afraid brides might freak out at seeing a double 18. I should get the approximately same SPL out of two 818's coupled together as I would out of the 828.
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Josh Rawls

Dennis Wiggins

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Re: JBL PRX or SRX
« Reply #10 on: January 13, 2016, 10:43:18 am »

"brides might freak out at seeing a double 18".

Flexibility and portability rules.

You can cluster the subs in the middle, if you want, or they make very stable speaker stands.  Also, there will be times where space will only allow 2 subs stacked, with 1 top on a shorter pole; run in mono.  It will kick!

-Dennis
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Len Zenith Jr

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Re: JBL PRX or SRX
« Reply #11 on: January 13, 2016, 05:35:10 pm »

Also, I'm afraid brides might freak out at seeing a double 18.

Put a white tablecloth over it, let her decide how to decorate it. Kids candies and snacks, photos, etc.
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Stephen Snipes

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Re: JBL PRX or SRX
« Reply #12 on: January 16, 2016, 09:12:19 pm »

Also, I'm afraid brides might freak out at seeing a double 18.

As long as your system is neat and clean and wires aren't all over the place exposed they aren't going to say anything.  Look at how many DJs set their lighting up in the air with all the cables just hanging and they end up in wedding pictures yet they don't seem to complain.  I've never had an issue with a bride complaining about my gear and I send EVERY couple a pic of my setup when I send them a quote so they will know what they are getting ahead of time.
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Ray Aberle

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Re: JBL PRX or SRX
« Reply #13 on: January 19, 2016, 10:12:54 am »

Having started my company as a wedding/school dance DJ (in the same position as you) -- there's something to be said for the flexibility of the SRX-812P/SRX818P combination. However, if I was in your spot and looking to purchase a PA, I would actually get 4 SRX-812Ps and 2 SRX818Ps to start with. Since, as you know, at weddings the people who are looking to really enjoy the music (i.e. feel the bass) are going to be on the dance floor, that's the main spot where you need to have that low end coverage.
Put a white tablecloth over it, let her decide how to decorate it. Kids candies and snacks, photos, etc.
Not sure if they're going to want all of that stuff shaking off every few minutes. ;) But in all seriousness, brides can sometimes be as bad as corporate event planners in that they don't want to see "all of those boxes everywhere," and having a smaller sub that's easier to tuck under a table or in a corner is not a bad idea.

With two more SRX-812Ps, that makes a quick and easy ceremony or cocktail lounge system. Since the speakers have two inputs available, you can put the ceremony music feed into one input and the officiant's lavaliere microphone into the other, for example. Or, if you have a larger venue, you can use that second pair as delay speakers. (I started my business with a pair each of Mackie SRM450s, SRS1500 15" subs and SR1530 15" 3-way tops, and within three years I added 2 more pairs of 450s and a pair of SA1521s. And sold the 1530s after a year, when I realized that I just didn't need them enough to justify the expense. Part of these upgrades was to support having one or two other DJs freelancing for me, but mostly was to improve the flexibility and coverage of my setups. You can include the main pair of speakers in your basic package cost, and then have the second pair of SRX-812Ps be "Just $129.95 total more" or whatever you want.)

and then buy one or two pairs of the SRX828Ps for the school dances, and you'll have a ridiculously good sounding system!

-Ray
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Josh Rawls

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Re: JBL PRX or SRX
« Reply #14 on: January 19, 2016, 10:28:27 am »

Right now the budget won't allow the purchase of an extra pair of 812's, though I agree with what you said. I do a lot of ceremony and cocktail hours in rooms other than where the reception is so I like the idea.

If the quotes for the lighting rig come in less than expected I will do it.
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Josh Rawls

nickyburnell

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Re: JBL PRX or SRX
« Reply #15 on: October 01, 2016, 06:45:57 am »

What about the music you are playing though???
Do you get into old 60's stuff on a regular basis, or even 70's rock?
I'd want 15" bass cabs in that environment personally, preferably 4 x 15" speakers.
 Lent a system to someone last year which had proper 18" subs running up to 100hz.
All the 60's stuff was horrid. Luckily the cabs on top were 2x15 + horn (Beyma stuff) and I quickly took all the 60hz and above up to them. Much better,
Just my pennies worth and of course if it's generally modern stuff then would agree basically with your choice.  Have fun.
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Josh Rawls

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Re: JBL PRX or SRX
« Reply #16 on: October 01, 2016, 11:29:13 am »

I forgot about this thread. Here's what I have so far:

2 - SRX812P
1 - SRX818SP
1 - SRX828SP

I run everything through a X32 and have it setup as LCR with the center mono channel feeding the subs. That gives me quick control over the sb levels. It also allows me to not send the mics to the subs which clears them up a bit.

I do have 2 more 812 speakers that I can rent when needed for delays or side fill. I plan on purchasing two more and at least one more 818 and 828 when budget allows.
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Josh Rawls

Ivan Beaver

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Re: JBL PRX or SRX
« Reply #17 on: October 01, 2016, 02:46:17 pm »


One difference I do see in the balanced input impedance. PRX is 20k and SRX is 40k. I understand that higher is better as it won't affect the output voltage of the source as much, is that correct?


Don't worry about the input impedance.

Assuming a drive impedance (output impedance of previous device) of 150 ohms, and a target load of 10X, you can easily hook up more than 10 cabinets to each output without loading down the driving device.
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