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Author Topic: Compact replacement for EAW SB180s  (Read 620 times)

jamesheyser

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Compact replacement for EAW SB180s
« on: January 13, 2019, 04:06:50 pm »

My SB180s were stolen so Im starting from scratch. I love these subs but since I have the chance to start over I figured Id throw it out there and see if there were alternatives that are either more compact or higher output in the same sized package. I like that I can manage them alone at 100lbs. I am not looking to compromise extension to low frequencies (25 hz). Any good alternatives?
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Helge A Bentsen

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Re: Compact replacement for EAW SB180s
« Reply #1 on: January 13, 2019, 04:33:26 pm »

If you wish to stay with EAW, JFL118 is pretty good and easy to handle IMHO.

Or you could always look around for some used SB1000. One of the easiest dual 18" to move around.
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Chris Grimshaw

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Re: Compact replacement for EAW SB180s
« Reply #2 on: January 14, 2019, 03:37:35 am »

Well, it's a decent 18" driver in a low-tuned cabinet.

If you're certain that you need that sort of low-frequency extension (ie, you've run your program material through an RTA, and decided there's enough VLF to be worth reproducing, and you're willing to trade SPL at 40-50Hz to get it*), I'd probably look for more of the same. There aren't many single-18" cabs tuned that low.

The alternative would be to DIY. Ported boxes aren't difficult. Something like the Orthorn would give you a lot more output, but it's a bigger (heavier) box.

What do you have in the way of amplification?

* It's worth noting that there's a serious tradeoff in SPL to get a cabinet to go to 25Hz. The same driver running to 40Hz would get about 8dB louder before running out of cone excursion. That's why most 1x18" subs get tuned in the 35-45Hz region.
FWIW, I have some 15"s that are flat-to-40Hz in a 600x440x440mm box that weighs a little over half the SB180s.
A quick simulation (comparing the 15" vs an 18" in a cabinet double the size and tuned to 25Hz, and each using 10mm of one-way cone excursion) puts the 15" 5dB ahead at 40Hz, and still 3dB ahead at 80Hz. With the necessary highpass filter in place, the 15" and 18" match in SPL at 36Hz, and below that the 18" wins.

I'd just like to make sure you're aware of the tradeoffs.

Chris
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David Morison

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Re: Compact replacement for EAW SB180s
« Reply #3 on: January 14, 2019, 05:07:47 am »

My SB180s were stolen so Im starting from scratch. I love these subs but since I have the chance to start over I figured Id throw it out there and see if there were alternatives that are either more compact or higher output in the same sized package. I like that I can manage them alone at 100lbs. I am not looking to compromise extension to low frequencies (25 hz). Any good alternatives?

To be fair, the 25Hz thing was the -10dB point on the original version, not the -3dB point that many might consider to be "flat".
The (admittedly later) SB180Z version includes graphs of the unprocessed response as well as the amount of processing going on to get it flat, to give you an idea of what the native response of the box/driver is: https://eaw-g9n1f8q3p5.netdna-ssl.com/docs/1_Current_Products/SB/Spec_Sheets/SB180zR_SPECS_revA.pdf
HTH,
David.
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Chris Grimshaw

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Re: Compact replacement for EAW SB180s
« Reply #4 on: January 14, 2019, 07:00:49 am »


HTH,
David.

Looks like it's actually tuned in the low-30s, but the processing results in the rolloff happening around 40Hz. Interesting choice. Maybe getting flat to 30Hz would've been too much EQ boost to be acceptable.

Chris
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John Schalk

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Re: Compact replacement for EAW SB180s
« Reply #5 on: January 14, 2019, 09:23:09 am »

There are 3 listings for used SB180 subs on reverb.com today.  The asking price ranges from $500 - $800.  Given that you are being forced to get new subs, I would give some consideration to switching to powered speakers.  ProAudioStar was having a pretty good sale last weekend on B-stock JBLs.  The one that caught my eye was the PRX818XLFW for $820.  JBL does publish the frequency response (I assume it's the processed output) for the PRX subs.
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Mike Pyle

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Re: Compact replacement for EAW SB180s
« Reply #6 on: January 14, 2019, 09:55:38 am »

The one that caught my eye was the PRX818XLFW for $820.

You might want to check with your favorite JBL dealer before you pay that for b-stock.
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John Schalk

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Re: Compact replacement for EAW SB180s
« Reply #7 on: January 14, 2019, 11:54:43 am »

You might want to check with your favorite JBL dealer before you pay that for b-stock.

I should've just wrote that in the first place :)
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David Morison

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Re: Compact replacement for EAW SB180s
« Reply #8 on: January 14, 2019, 04:19:20 pm »

Looks like it's actually tuned in the low-30s, but the processing results in the rolloff happening around 40Hz. Interesting choice. Maybe getting flat to 30Hz would've been too much EQ boost to be acceptable.

Chris

Looks like it would take about 6dB more boost to get 30Hz to -3dB, so you could well be right.
I'm sure a much larger vent would be required to handle that extra boost near Fb, eating into Vb as well.
D.
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