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Old 02-06-2017, 11:24 PM
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Alright can I get some impedance advice here -

In a way I am worried going from 10 speakers of 8 ohm impedance to all being 4 ohm will kill the DSP amp over time - and my goal is oem+ with keeping the DSP amp.

Everything I read says that if you are going to lower impedance but the drivers are more efficient, it negates any extra amp draw since it is using power more efficiently? But I don't have a confirmation of this.

However, I am debating sticking with 8 ohm Dayton Audio woofers, and leaving the other 6 at a lower 4 ohm. Will this make a difference keeping 40% of the drivers at stock impedance levels? The 8 ohm Dayton woofers are 88.7 db sensitivity, while the JL components and 4 ohm Dayton woofers are 92db efficient.

I'm driving myself crazy trying to figure this audiophile shit out.
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  #2  
Old 02-06-2017, 11:54 PM
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Quote:
Originally Posted by Ricky Bobby View Post
Alright can I get some impedance advice here -

In a way I am worried going from 10 speakers of 8 ohm impedance to all being 4 ohm will kill the DSP amp over time - and my goal is oem+ with keeping the DSP amp.

Everything I read says that if you are going to lower impedance but the drivers are more efficient, it negates any extra amp draw since it is using power more efficiently? But I don't have a confirmation of this.

However, I am debating sticking with 8 ohm Dayton Audio woofers, and leaving the other 6 at a lower 4 ohm. Will this make a difference keeping 40% of the drivers at stock impedance levels? The 8 ohm Dayton woofers are 88.7 db sensitivity, while the JL components and 4 ohm Dayton woofers are 92db efficient.

I'm driving myself crazy trying to figure this audiophile shit out.
Wish I could answer your question. In my experience (I used to be a pro mobile audio tech) changing impedance on speakers for OEM systems was not a good idea and almost always ended up with interference and distortion when listening to anything above ~25% volume. I am very surprised that the OEM DSP amp is turning out to be 4ohm stable across all 10 channels without producing negative results.

@prop, I can confirm that BSW's amp is not a very good unit. I want to replace mine as well but I went through so much trouble making it look/function so well in the electronics mounting bracket that I have a hard time replacing it. I know I should, but the BSW just looks so good and solid where I have it on the rack that it keeps me from ordering a small form factor mono block to replace the crappy thing.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log
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2006 X5 4.8is Build 11/05 Maintenance/Build Log
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2010 X5 35d Build 02/10
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  #3  
Old 02-07-2017, 12:02 AM
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Drove 850 miles today with the Eonon GA6166 driving my speaker upgrades and loved every minute of it.

Such clarity and I'm getting a really nice low end punch from my DSP sub connected to an aftermarket amp.

Happy camper!

Thanks for the speaker upgrade guidance folks!

Mike
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  #4  
Old 02-07-2017, 12:57 AM
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Quote:
Originally Posted by crystalworks View Post
Wish I could answer your question. In my experience (I used to be a pro mobile audio tech) changing impedance on speakers for OEM systems was not a good idea and almost always ended up with interference and distortion when listening to anything above ~25% volume. I am very surprised that the OEM DSP amp is turning out to be 4ohm stable across all 10 channels without producing negative results.

@prop, I can confirm that BSW's amp is not a very good unit. I want to replace mine as well but I went through so much trouble making it look/function so well in the electronics mounting bracket that I have a hard time replacing it. I know I should, but the BSW just looks so good and solid where I have it on the rack that it keeps me from ordering a small form factor mono block to replace the crappy thing.
Yeah I went with a focal mono amp and had to do some custom fabrication n the plastic moldings in the trunk area to conceal the amp but make it blend in nicely.
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  #5  
Old 02-07-2017, 12:55 AM
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Quote:
Originally Posted by Ricky Bobby View Post
Alright can I get some impedance advice here -

In a way I am worried going from 10 speakers of 8 ohm impedance to all being 4 ohm will kill the DSP amp over time - and my goal is oem+ with keeping the DSP amp.

Everything I read says that if you are going to lower impedance but the drivers are more efficient, it negates any extra amp draw since it is using power more efficiently? But I don't have a confirmation of this.

However, I am debating sticking with 8 ohm Dayton Audio woofers, and leaving the other 6 at a lower 4 ohm. Will this make a difference keeping 40% of the drivers at stock impedance levels? The 8 ohm Dayton woofers are 88.7 db sensitivity, while the JL components and 4 ohm Dayton woofers are 92db efficient.

I'm driving myself crazy trying to figure this audiophile shit out.
RB I think your over thinking this but your have to feel confident with this. BSW takes the impedence down to 3.2 ohms (when they used speakers built by Rainbow) on the earlier speaker sets and 4 ohms (MB Quart) on the later ones. Those BSW speakers have been running for quite some time in E53 X5s with no adverse outcomes.
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  #6  
Old 02-07-2017, 08:50 AM
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Quote:
Originally Posted by X53Jay4.8is View Post
RB I think your over thinking this but your have to feel confident with this. BSW takes the impedence down to 3.2 ohms (when they used speakers built by Rainbow) on the earlier speaker sets and 4 ohms (MB Quart) on the later ones. Those BSW speakers have been running for quite some time in E53 X5s with no adverse outcomes.
Thanks Jay you do make me feel better. And I think part of it is not just impedance but efficiency and these JL drivers are very efficient.

Part of my problem between doing upgrades is I sit around and get indecisive while I wait for the time to do them lol!
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2013 X5 35D (CEO's) - Born on 5/17/2013 -
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