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Author Topic: LS608 power requirments for dj work  (Read 13035 times)

Marc Benedict

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LS608 power requirments for dj work
« on: January 13, 2009, 09:06:33 am »

Hi,I have fairly little experience with sound reinforcement and have spent the last several weeks lurking on this forum trying to learn as much as possible.There is a wealth of info out there and I thank you in advance for your responses.

After reading all the good posts about the ls608 subs,I recently purchased 4 of them.I am now looking for an amp to drive them.Weight and size of the amp is not issue.However,I mostly cater for DJ events and unsure of how much power to give them.All the posts I have read on this forum focus on using the subs for live sound,recommending 800w into each cab.Is this too much power for DJ applications?Would it be safer to run 600w(stereo mode from xti4000) into each them and still obtain enough sound from the cabs?or should i run the recommended 800w with heavy limiting?

Lastly,we mostly work in small to medium venues.Roughly what size crowd would the 4 subs cater to?

Marc
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Tom Manchester

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Re: LS608 power requirments for dj work
« Reply #1 on: January 13, 2009, 12:17:00 pm »

4 of those subs, probably between 300-500 people comfortably as long as you aren't pushing them too hard. They don't do a lot below 45 or 50hz so make sure you use atleast a 40hz high pass on them so you don't roast them or try and reproduce some of the extreme LF some dance music has. You probably will want to find something in the 800-1000 watt per cab range, they should take it fine. Don't clip the amp. They are great little subs, one of the best business investments I ever made.
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Evan Kirkendall

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Re: LS608 power requirments for dj work
« Reply #2 on: January 13, 2009, 12:30:52 pm »

Tom Manchester wrote on Tue, 13 January 2009 12:17

4 of those subs, probably between 300-500 people comfortably as long as you aren't pushing them too hard. They don't do a lot below 45 or 50hz so make sure you use atleast a 40hz high pass on them so you don't roast them or try and reproduce some of the extreme LF some dance music has. You probably will want to find something in the 800-1000 watt per cab range, they should take it fine. Don't clip the amp. They are great little subs, one of the best business investments I ever made.


+1

Though, for DJ use, you might be safer assuming 250-400 people with them.

They'll take 800 watts all day long, no matter how dense the program material is. They were great little subs to us.



Evan
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Vinny D'Agostino

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Re: LS608 power requirments for dj work
« Reply #3 on: January 13, 2009, 03:32:56 pm »

I use a QSC RMX4050HD on my LS608 subs, one 4050 will power all 4 LS608's with ease.

Justin Stern

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Re: LS608 power requirments for dj work
« Reply #4 on: January 19, 2009, 10:40:23 pm »

Let's think about this guys...

This cabinet is rated at 500watss RMS.  So if you purchase an amp that has 500RMS, that produces 27db of gain.  Look at the sensitivity which is 103 and TRUE, not some BS like some other companies.  27+103= 130db.  That is only with 500 watts.  By pushing 800 watts, you barley gain any output.  Now if you push 1000 watts (program rating) which is not a very good idea for DJing since it is so compressed, not to mention you are really pushing that single 18" you would gain 3db from going to 500 to 1000 watts.  If that is worth it to you, then you go ahead and do so.  3db is barley noticeable, and is prob not even 3db because things will start  to heat up, literally at that point and stress the woofer, which probably in itself would cause another 1db loss, resulting in 2db gain.  YOU WILL NOT NOTICE that and it is a lot ogf trouble just to get 2db (1000watts) so just put around 500RMS into each of the babies and you will be rocking. Those subs a freaking amazing.  Best single 18 I have heard.  Oh, and by the way, it does not fall off its face like some people say.  The Growler will beat it at 40hertz, but as soon as 43, 44 come to playm GAME OVER all the way up.  Nice sub purchase.  Four of them coupled is quite impressive.
 
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Evan Kirkendall

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Re: LS608 power requirments for dj work
« Reply #5 on: January 20, 2009, 12:05:24 am »

Justin,

They're 400/800w. They'll do 132dB peak. And, they're -3dB @ 50hz, -10 @ 45hz. Just so you know. Wink




Evan
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Justin Stern

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Re: LS608 power requirments for dj work
« Reply #6 on: January 20, 2009, 12:10:27 am »

My bad.  Meant to say 400rms (cont) and 800 program that is why 500 into each cabintet is fine.  There is not need to push much more than that as the output would barely change. 500wats gets you 130db, just 2bshy of peak.  Show me which graph you are looking at. I will try to get the one I got my hands on showing how it is not that bad at 45, especially when comparing to Growler.
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Evan Kirkendall

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Re: LS608 power requirments for dj work
« Reply #7 on: January 20, 2009, 12:41:24 am »

Justin Stern wrote on Tue, 20 January 2009 00:10

My bad.  Meant to say 400rms (cont) and 800 program that is why 500 into each cabintet is fine.  There is not need to push much more than that as the output would barely change. 500wats gets you 130db, just 2bshy of peak.  Show me which graph you are looking at. I will try to get the one I got my hands on showing how it is not that bad at 45, especially when comparing to Growler.


I measured them myself. Don't have the SMAART traces on hand though.

You could be fine running 500 watts into them assuming your music is very compressed(DJ), but you'll want way more for rock and roll type stuff. A kick hit would launch the amp into clip every time trying to get enough thump. The extra power knocks those peaks out without clipping the amp.


Evan
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Marc Benedict

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Re: LS608 power requirments for dj work
« Reply #8 on: January 20, 2009, 09:16:19 am »

hi,thanks for all the great info so far...I just downloaded the ls608 service manual and found some inconsistent info:
I was under the impression that the ls608 and ls808 use the same driver.The specs listed on the website rate both the 608 and 808 at 800wpgm.However,in the service manual the 608 is listed at 800wpgm and the 808 at 1200wpgm!I know that Yorkville are very conservative with their ratings.Is 1200wpgm a more accurate figure for the ls608/808 or is the extra power handling in the 808 down to design/efficiency of the larger box?.....or is it just a mistake in the manual?
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Evan Kirkendall

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Re: LS608 power requirments for dj work
« Reply #9 on: January 20, 2009, 05:45:52 pm »

Marc Benedict wrote on Tue, 20 January 2009 09:16

hi,thanks for all the great info so far...I just downloaded the ls608 service manual and found some inconsistent info:
I was under the impression that the ls608 and ls808 use the same driver.The specs listed on the website rate both the 608 and 808 at 800wpgm.However,in the service manual the 608 is listed at 800wpgm and the 808 at 1200wpgm!I know that Yorkville are very conservative with their ratings.Is 1200wpgm a more accurate figure for the ls608/808 or is the extra power handling in the 808 down to design/efficiency of the larger box?.....or is it just a mistake in the manual?


Sounds like a misprint in the manual. They both have the exact same driver...



Evan
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