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Author Topic: Which subwoofer would work best?  (Read 3102 times)

Jack Daugherty

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Which subwoofer would work best?
« on: August 23, 2005, 07:35:19 am »

I have a P.A. system consisting of JBL SR 4733A Series II with 2 15" woofers and a horn.  I also have the matching 18" subwoofer that goes with it for each side.  I use a Crown 3600 to drive the mains and a Crown K2 2500 watt to drive the two subs in addition to two Eminence 18" in ported boxes.  The problem is I am way under the subwoofer output I need.  I DJ and also provide P.A. for bands.  I need enough bass output that you can feel it even on an outdoor event but stay as compact as possible.  I am not on an unlimited budget as are most of us.  I possibly have a chance to purchase 4 SR series JBL double 18" subs from a local band who may be upgrading their whole system.  They are said to put out about 136 spl at 1 meter according to JBL.

I also have looked at EAW LA 400 which are a little lighter, and smaller, but are said to put out 140 spl at 1 meter.  I would have to buy the EAW new and would only be able to buy two at first.  Would I be better off with the JBLs or the EAWs?  I would use the Crown 3600 to drive which ever I bought.  
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Dave Rickard

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Re: Which subwoofer would work best?
« Reply #1 on: August 23, 2005, 03:00:10 pm »

Jack D. wrote on Tue, 23 August 2005 05:35

I need enough bass output that you can feel it even on an outdoor event but stay as compact as possible.

Those criteria point toward multiple horn loaded subs, and a crossover with appropriate delay capabilities for your top boxes.  Add these horns to your list of candidates:

The LabSUB right here.
http://www.yorkville.com/products.asp?id=152&cat=2&t ype=29
http://www.yorkville.com/products.asp?id=317&cat=38& type=29
Bill Fitzmaurice's tuba series   http://www.BillFitzmaurice.com/

Hoffman's Iron Law is hard at work here.  

See http://www.trueaudio.com/st_trade.htm

Dave
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Dave
Yorkville dealer

"The wrong piece of gear, at the right price, is still the wrong piece of gear."

"If you don't have good stuff at each end of the signal chain, (mics and speakers) what you use in between is just turd polish."--Dave Dermont

Michael 'Bink' Knowles

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Re: Which subwoofer would work best?
« Reply #2 on: August 23, 2005, 03:31:13 pm »

I'm not going to recommend a sub purchase but I will say that runnning four sub boxes of two different types is a bass-killer. Too often the two types interfere with each other in weird ways.

Beyond that: sub power is increased when subs are positioned against large, hard surfaces (such as the ground) that add to the apparent power. Can you back them up to a wall? A wall would give you two hard surfaces which is better than one. Grouping your subs together will be louder and deeper than separating them into Left and Right stacks.

-Bink
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Michael 'Bink' Knowles
www.binkster.net

bgavin (Bruce Gavin)

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Re: Which subwoofer would work best?
« Reply #3 on: August 23, 2005, 03:34:21 pm »

Bink wrote on Tue, 23 August 2005 12:31

...but I will say that runnning four sub boxes of two different types is a bass-killer. -Bink
+1
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Jack Daugherty

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Re: Which subwoofer would work best?
« Reply #4 on: August 24, 2005, 08:55:36 am »

I won't run the other subs with horn subs.  I do have an oppurtunity to buy four SR series double 18" subs that a local band is going to be selling.  I can probably afford all four of them.  They are suppose to put out 136 spl per box.  I have also considered EAW LA 400 because they are smaller and lighter but are rated at 140 spl.  I would have to buy the EAWs new and could only afford two of them.  My question is would I be better off getting the four front loaded JBLs or two horn loaded EAWs until I could afford two more at a later date.
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