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Author Topic: Beater Sub  (Read 13808 times)

Ben Lawrence

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Beater Sub
« on: February 24, 2010, 05:12:42 pm »

Hello,
I purchased a set of EAW tops and these what appear to be diy made subs as a set. Anyhow the carpet job on them was looking pretty bad so I am just trying to clean them up a bit. They are loaded with EVM 18b drivers which are stamped as 200w@8 ohm. Some of you may be familiar with these. Anyhow I was wondering if it might be worth looking into updating the drivers. I have received some pretty good advice here in the past and am just seeing what a few of you think.

intereior box dimensions.
46"height
22"wide
27"deep

Sorry for the cell phone pic.
index.php/fa/28322/0/

Elliot Thompson

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Re: Beater Sub
« Reply #1 on: February 24, 2010, 10:29:14 pm »

The box resembles an old W bin cabinet that someone converted into what appears (the photos are very dark) to be a double eighteen reflex cabinet. The drivers should date back to the late 1970’s to early 1980’s when 200 watts was considered a lot of power.

If the cabinet is still solid, you could replace the drivers and, re-tune the cabinet to achieve optimum performance for whatever woofers you are eyeing.  Only you can determine if the upgrade, or buying possibly a used JBL 728 would be a better investment.

Best Regards,
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Elliot

Paul O'Brien

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Re: Beater Sub
« Reply #2 on: February 24, 2010, 11:16:36 pm »

Ben Lawrence wrote on Wed, 24 February 2010 17:12

 They are loaded with EVM 18b drivers which are stamped as 200w@8 ohm. Some of you may be familiar with these. Anyhow I was wondering if it might be worth looking into updating the drivers.


If the cabs are solid then yes newer drivers will make them usefull, the 18b can't even be considered a true "suwoofer" by todays standards so pretty much anything will be an upgrade.

Realistic options would start with PV Lowriders I think, you need this much driver to get something that can actually handle it's rated power, but the Definimax 18LF and B&C TBX series would also be good choices if your budget is a little richer. Stepping up to the JBL drivers doesn't buy you any more power handling or output and the newer EV drivers would actually be a step down so these last two aren't the best value.
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Paul O

Ben Lawrence

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Re: Beater Sub
« Reply #3 on: February 25, 2010, 09:43:55 am »

I cant seem to find the PV Lowrider in the drivers listed on WinISD.

Paul O'Brien

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Re: Beater Sub
« Reply #4 on: February 25, 2010, 01:45:08 pm »

It's not you will have to add it.
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Rik Turner

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Re: Beater Sub
« Reply #5 on: February 25, 2010, 03:26:50 pm »

whats the size of the box, inside dims at front lip and depth? looks like something I've seen before but nothing to reference size in the picture
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Ben Lawrence

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Re: Beater Sub
« Reply #6 on: February 25, 2010, 03:40:40 pm »

I posted the internal dimensions above in my original post. Im not sure what you are referring to the lip. I will take another couple of pics when I get a chance.

Gene Hardage

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Re: Beater Sub
« Reply #7 on: February 27, 2010, 07:38:39 pm »

Scrape the carpet off and paint the cabs.
Put some speaker dope goo on the surrounds of the old EV 18s.
Install speakers - fire them up and listen for rattles.
If they work OK use them 'till they blow and if you really like them you can then recone them to the current 400 watt type.
While you're using them save your pennies for something better.
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Art Welter

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Re: Beater Sub
« Reply #8 on: February 28, 2010, 03:46:22 pm »

Gene Hardage wrote on Sat, 27 February 2010 17:38

Scrape the carpet off and paint the cabs.
Put some speaker dope goo on the surrounds of the old EV 18s.
Install speakers - fire them up and listen for rattles.
If they work OK use them 'till they blow and if you really like them you can then recone them to the current 400 watt type.
While you're using them save your pennies for something better.

The 400 watt voice coil is 3 dB less efficient, a waste of power.
The limitation of the 18B speaker is it has fairly little X max.

That said, if you aren't looking for pant leg fluttering lows, the 18B does a good job.
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Gene Hardage

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Re: Beater Sub
« Reply #9 on: February 28, 2010, 10:54:04 pm »

Art Welter wrote on Sun, 28 February 2010 15:46

Gene Hardage wrote on Sat, 27 February 2010 17:38

Scrape the carpet off and paint the cabs.
Put some speaker dope goo on the surrounds of the old EV 18s.
Install speakers - fire them up and listen for rattles.
If they work OK use them 'till they blow and if you really like them you can then recone them to the current 400 watt type.
While you're using them save your pennies for something better.

The 400 watt voice coil is 3 dB less efficient, a waste of power.
The limitation of the 18B speaker is it has fairly little X max.

That said, if you aren't looking for pant leg fluttering lows, the 18B does a good job.


Very interesting - my speaker fixer never mentioned that.  He just said that the new cones are rated at 400 watts and presto your old 200 watt frame becomes a new 400 watt speaker.  It's been a long time since my last EV recone and it just happened to be an old 18 that we used the newer 400 watt kit and stuffed it back in the dinosaur EV 1803 cab with the aluminum edging.  Still makes a great keyboard monitor.
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