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Author Topic: JBL SRX-728 or EV QRX-218? Which best for my music style?  (Read 35992 times)

jack smith

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JBL SRX-728 or EV QRX-218? Which best for my music style?
« on: October 06, 2009, 12:30:30 pm »

As some of you know, i'm after some new subs, and have a few ideas, but out of the EV QRX-218 and the JBL SRX-728, which one do you guys think is the best for music like this :

http://www.youtube.com/watch?v=E3QwPYFWiKQ"]http://www.youtube.com/watch?v=E3QwPYFWiKQ

http://www.youtube.com/watch?v=8XdXN_Av9jY&feature=relat ed " ]http://www.youtube.com/watch?v=8XdXN_Av9jY&feature=rela ted

Thats the kind of music I play at allk my parties. Its got seriously unbelievable amounts of tuneful sub bass around 35-45hz that kills subs. I got a few ideas about subs and whether or not they'd be good for me, but if I was to go for reflex subs, and went for 1 of the 2 mentioned above, which one do you guys think would be the best for this kind of music?

I was thinking about JBL SRX-728 subs, but just saw the EV QRX-218 subs and they look nice, and look liek they go down pretty low.
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Peter Etheredge

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Re: JBL SRX-728 or EV QRX-218? Which best for my music style?
« Reply #1 on: October 06, 2009, 12:33:39 pm »

jack smith wrote on Tue, 06 October 2009 11:30

As some of you know, i'm after some new subs, and have a few ideas, but out of the EV QRX-218 and the JBL SRX-728, which one do you guys think is the best for music like this :

http://www.youtube.com/watch?v=E3QwPYFWiKQ"]http://www.youtube.com/watch?v=E3QwPYFWiKQ

http://www.youtube.com/watch?v=8XdXN_Av9jY&feature=relat ed]  http://www.youtube.com/watch?v=8XdXN_Av9jY&feature=relat ed "  ]http://www.youtube.com/watch?v=8XdXN_Av9jY&feature=rela ted

Thats the kind of music I play at allk my parties. Its got seriously unbelievable amounts of tuneful sub bass around 35-45hz that kills subs. I got a few ideas about subs and whether or not they'd be good for me, but if I was to go for reflex subs, and went for 1 of the 2 mentioned above, which one do you guys think would be the best for this kind of music?

I was thinking about JBL SRX-728 subs, but just saw the EV QRX-218 subs and they look nice, and look liek they go down pretty low.


The general consensus seems to be that the SRX subs are the way to go, although I'd recommend getting a pair (or pair per side) of the SRX 718s, as you'll have the same output in a much easier to move package for only a hundred bucks or so more.

Apparently the QRX subs just aren't on the same level as their matching tops.

What are your tops btw?
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Peter Etheredge
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Top-Notch Productions, INC.
petheredge(at)tnprod.com

jack smith

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Re: JBL SRX-728 or EV QRX-218? Which best for my music style?
« Reply #2 on: October 06, 2009, 12:45:09 pm »

Well I haventn't got any yet but I was thinking about either a pair of EV Tour X series TX-1152 because I heard them a couple of weeks ago and thought they seemed to have a nice flat sound to them. I prefered the JBL MRX-515 that I tried the week before, but they're not as loud as the TX-1152 cabs. I need something that would keep up with a pair of either the EV QRX-218 or JBL SRX-728 subs. To keep up with the subs, I was gonna buy 4 tops, 2 to go on each sub.

So do the SRX-728's sound better or is it that they go deeper?
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Tom Reid

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Re: JBL SRX-728 or EV QRX-218? Which best for my music style?
« Reply #3 on: October 06, 2009, 12:49:34 pm »

When shopping for woofers it is best to take a two pronged approach.
Yes you want glorious boom boom from the right cabinet in the right way.  But the only way to achieve serious ooomph is to adequately power the boxes you lust for.

Shop for woofers and amps.
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tom

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jack smith

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Re: JBL SRX-728 or EV QRX-218? Which best for my music style?
« Reply #4 on: October 06, 2009, 12:53:31 pm »

If I was going to go for the SRX-728 subs i'd power them with a Lab Gruppen Lab4000 amp which gives them 2,100 watts per channel into 4 ohms. If I was gonna go with the QRX-218 subs, i'd power them with a QSC RMX-5050 which gives them 1,600 watts per channel into 4 ohms.
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Tom Reid

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Re: JBL SRX-728 or EV QRX-218? Which best for my music style?
« Reply #5 on: October 06, 2009, 01:07:54 pm »

Not enough jack.

728s perk up at 3kw.

2kw is asking for heat.
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tom

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Adam Schaible

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Re: JBL SRX-728 or EV QRX-218? Which best for my music style?
« Reply #6 on: October 06, 2009, 01:37:25 pm »

I'm sorry, this makes absolutely no sense to me.

The Lab Gruppen 2100 w amp will blow the nuts off of a bridged xti 4000.

The drivers are rated at 800w rms.  400w rms is probably a safe bet with 6-9db of headroom (which the LG would provide - 30ms burst range).

The difference between 3000w and 2000w is 1.5 db MAX.


Edit - re-read and this sounded rude, wasn't meant to be.
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Tom Reid

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Re: JBL SRX-728 or EV QRX-218? Which best for my music style?
« Reply #7 on: October 06, 2009, 01:42:38 pm »

Adam Schaible wrote on Tue, 06 October 2009 12:37

I'm sorry, this makes absolutely no sense to me.

The Lab Gruppen 2100 w amp will blow the nuts off of a bridged xti 4000.

The drivers are rated at 800w rms.  400w rms is probably a safe bet with 6-9db of headroom (which the LG would provide - 30ms burst range).

The difference between 3000w and 2000w is 1.5 db MAX.


Edit - re-read and this sounded rude, wasn't meant to be.


Adam, don't assume I was just talking about an xti4k.
I've been quite intimate with the 728s for about 3 years now (well, as intimate as someone can be with woofers...), and I've pushed them with lots of amps.

They sound better with more than 3kw.
Period.
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tom

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Daniel Nickleski

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Re: JBL SRX-728 or EV QRX-218? Which best for my music style?
« Reply #8 on: October 06, 2009, 01:43:48 pm »

The QRX's are some of the smoother subs I have worked with when they have real power behind them (Crest Pro9200's). If you don't have real power you need to look for another sub.

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Daniel Nickleski
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Adam Schaible

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Re: JBL SRX-728 or EV QRX-218? Which best for my music style?
« Reply #9 on: October 06, 2009, 01:48:25 pm »

What I'm getting at is more than 3kw what?  Peak, RMS?

It's a weird thing to say - 3kw RMS would be way over the peak rating of the cab assuming a 6db crest factor (which it's probably closer to 10db on average).

The thermal rating on the drivers is 800w based on a 6db crest (if memory serves me correctly).
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