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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Earthquake SWS-8xi 2ohm review



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      07-04-2012, 12:08 AM   #23
hochinfai
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how about 2oms for base stereo with no amp??

any changed or improvment for the sound quality?
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      06-27-2013, 09:09 AM   #24
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How can you tell which setup you have? (I have a 135i, subwoofer stopped working under drivers side)
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      01-20-2014, 08:03 PM   #25
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So the 8xi's can only receive a 2 ohm load from an aftermarket amp? If your planning on not getting an aftermarket amp get the sws-8's?
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      01-20-2014, 09:23 PM   #26
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Wrong post
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      02-09-2014, 05:55 PM   #27
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Quote:
Originally Posted by joeyc123 View Post
So the 8xi's can only receive a 2 ohm load from an aftermarket amp? If your planning on not getting an aftermarket amp get the sws-8's?
So the engineer/founder/ceo of earthquake told me he recommends the 8xi's for oem amps/bmw professional and the 8's for an aftermarket amp. Obviously 8xi's can work with some aftermarket amps.
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      05-14-2014, 02:44 PM   #28
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Quote:
Originally Posted by sahyoun View Post
So the engineer/founder/ceo of earthquake told me he recommends the 8xi's for oem amps/bmw professional and the 8's for an aftermarket amp. Obviously 8xi's can work with some aftermarket amps.
So I blew my passenger side sub and while researching found this. http://www.e90post.com/forums/showthread.php?t=124276 granted mine is an 07 and as it says on earthquakes site, certain models use the 2ohm OR the 4ohm. I know from the pdf in this post that the logic 7 system requires the 4ohm. Which is the SWS 8.
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      01-13-2015, 11:49 AM   #29
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Quote:
Originally Posted by hochinfai View Post
how about 2oms for base stereo with no amp??

any changed or improvment for the sound quality?
Sorry to dig up an old thread, but was wondering if this 8xi sub would be ok with the stock/oem Hi-Fi system/amp? Really trying to find an underseat sub improvment without having to do the aftermarket amp addition
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      03-07-2016, 11:22 AM   #30
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I only registered to this forum to inform you about the following:

Sorry for pulling this old thread out of it's grave , but:
I was working at BMW in Munich the last 11 Years as Resident Eng. and had a chance to talk to the Resident Engineer, who was supporting the L7 Amps.
LEAR is the manufacturer of the Logic7 AMP for the E6x and E9x .
He told me, that there will be absolutely no Problem in driving 2 Ohm speakers at the (Sub-)Woofer terminals.
The amplifier is a Class-D (!) and is specified to drive 2 Ohm speakers.

In the case of an shortcut, the amp is trying to reactivate the according output 10 times ( 500ms signal, 500ms off ).
After these retries, the output will be switched off and stays off, until you switch off ignition and on again. Also a DTC will be stored in the Amp.
If the Amp goes in "overheat", the power ot the outputs will be limited, if the temperature is still rising, the output will be switched off and a DTC will be stored .

So it doesn't matter if you use 2 Ohm Subs like the Earthquake XI.
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      03-11-2016, 04:38 PM   #31
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Quote:
Originally Posted by ProstetnikJeltz View Post
I only registered to this forum to inform you about the following:

Sorry for pulling this old thread out of it's grave , but:
I was working at BMW in Munich the last 11 Years as Resident Eng. and had a chance to talk to the Resident Engineer, who was supporting the L7 Amps.
LEAR is the manufacturer of the Logic7 AMP for the E6x and E9x .
He told me, that there will be absolutely no Problem in driving 2 Ohm speakers at the (Sub-)Woofer terminals.
The amplifier is a Class-D (!) and is specified to drive 2 Ohm speakers.

In the case of an shortcut, the amp is trying to reactivate the according output 10 times ( 500ms signal, 500ms off ).
After these retries, the output will be switched off and stays off, until you switch off ignition and on again. Also a DTC will be stored in the Amp.
If the Amp goes in "overheat", the power ot the outputs will be limited, if the temperature is still rising, the output will be switched off and a DTC will be stored .

So it doesn't matter if you use 2 Ohm Subs like the Earthquake XI.
So you are saying im good to buy the EarthQuake SWS 8 XI for my 2009 328i, and operate it fine with out the amp being ruined. I have lost BOTH of my subs and i NEED a replacement. In fact im sure the drivers side wires are shot because i heard sizzling.
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      03-18-2016, 10:56 AM   #32
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As far as I can see, there is no Problem in using the XI instead of the 4 Ohm .
I'm running them in my E60 for the last two years without any problem.
Maybe it's a good idea, to measure the wires to be sure, that they have no contact to ground, before intalling the earthquakes.
It's a kind of mess to install them, but the sound is wort it.
I needed 2 hours for both speakers, but you have to replace them anyway .

Greetings from Munich
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      06-06-2016, 03:59 PM   #33
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Sorry to revive this thread. I've had 2 more 335i's since this thread. All had the L7. I ran the 2ohm subs for 2 years without any problem except one time I was driving back from bimmerfest (LA to Bay Area) non stop blasting music and the radio shutoff after about 5 hours of nonstop playing. I felt the amp and it felt decently warm, nothing was burning or melted. Waited 5 min and everything worked fine. Interestingly I had the same thing happen with the stock subs in my current e92. The 2ohms work just fine, I havent been able to find a single documented case of anyones stock amp failing due to a 2ohm aftermarket sub.
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      06-07-2016, 09:32 AM   #34
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Quote:
Originally Posted by sahyoun
Sorry to revive this thread. I've had 2 more 335i's since this thread. All had the L7. I ran the 2ohm subs for 2 years without any problem except one time I was driving back from bimmerfest (LA to Bay Area) non stop blasting music and the radio shutoff after about 5 hours of nonstop playing. I felt the amp and it felt decently warm, nothing was burning or melted. Waited 5 min and everything worked fine. Interestingly I had the same thing happen with the stock subs in my current e92. The 2ohms work just fine, I havent been able to find a single documented case of anyones stock amp failing due to a 2ohm aftermarket sub.
Its sounds very much like your L7 amp went into thermal protect mode.
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      06-07-2016, 03:32 PM   #35
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Quote:
Originally Posted by taibanl View Post
Its sounds very much like your L7 amp went into thermal protect mode.
Yep, which it did with both the stock subs and the SWS in either case after 5 hours of playing.
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