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  #181  
Old 02-06-2017, 09:15 PM
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Quote:
Originally Posted by Clockwork View Post
too bad not as cheap as the Memphis mid ranges.
Ok boys.. in the interest of... I dunno.. keeping things interesting...

I ordered these 2.75" mids today from Amazon. They will be used for the E46 (pics from earlier post):
My thought is that I will trim the bumfizzle out of this thing and see what that's like as a replacement for the E53 rear doors. In my heart of hearts, I think upon all that is thoughtable... That these are the exact same things as the Memphis Audio mids. And they're $25 less.

Anyway.. it's worth a shot.
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  #182  
Old 02-06-2017, 10:21 PM
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Prop let me know how you do - the Memphis midranges I got on eBay for $35 shipped? If anything just trim that ring all around so there is nothing left and it should go in place on the rear door. Sucks that you have to rip the door panel twice.

I'm actually in the opposite boat I'm looking to get my factory dash midranges out of the trash and see if I can cut the factory speaker out yet retain the mount and then hot glue those 2" Vifa/Peerless midranges in place. So I have the same midrange driver in the dash and rear doors.

The Memphis fit well for the most part but I feel I could make it more factory like.

Edit - don't feel like going to the trash bin and since the Memphis units are 85db so a touch more efficient than the Vifa - which is better to have more efficient replacement speakers since going down to 4 ohm.
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Last edited by Ricky Bobby; 02-06-2017 at 10:30 PM.
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  #183  
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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Proud 3-Pedal owner, UUC SS/AFE/4.8iS Exhaust/Sharked
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  #184  
Old 02-06-2017, 11:40 PM
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Quote:
Originally Posted by Clockwork View Post
Mike when you used the Styrofoam housing to hold the JL tweeter, you didnt have to reuse the black plastic "arm" which is held in place by the Torx 30 screws right?
Correct, the black plastic arm and tweeter are now history.



Mike
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  #185  
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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  #186  
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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  #187  
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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  #188  
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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  #189  
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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  #190  
Old 02-07-2017, 01:15 PM
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Well I don't want to kick a gift horse in the mouth, but I am debating trying a different driver in the dash midrange location - the Memphis fits the part for about 96% of it, I probably should just oval out the mounting holes a bit, as they are a wee bit wider than the factory driver it replaced, I'd say by 2-3mm. See the pic below showing about 67mm mounting holes.




I'm unsure about how many watts RMS these drivers are continuously getting from the factory but the 15w RMS seems good - I took a gander through all the speakers in the 1.75" - 2.5" (since you really have to check the specification charts) category for midranges, and happy to report the Vifa ones are still the best fit for the rear door. However, thinking maybe I can take one of these square midranges and with a bit of dremeling on the plastic surround, make the mount look like the "oval-esque" Memphis Audio unit - They are a touch more sensitive at 87db, but only taking 10w RMS and 20W max so maybe this would not be a good driver as it would get maxed out quickly? I should just stick with my Memphis units and just get another set for $35 which I can trim a bit more neatly, oval out the mounting holes and leave the wire leads on so I can really tuck the capacitor down into the dash so it doesn't drive me crazy LOL - my indesiciveness drives me crazy so I really should just drop the remaining $350 today on the speakers I need to complete this -

https://www.parts-express.com/tang-b...river--264-807

https://www.parts-express.com/pedocs...ifications.pdf
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Proud 3-Pedal owner, UUC SS/AFE/4.8iS Exhaust/Sharked
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