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02-04-2012, 06:45 PM | #45 |
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OK.. I got Chris Fine's old amp from his M Coupe coded to my wife's 3.0i.. It now sounds fantastic!! Before, it sounded poor in both our cars.. This tells me a few things..
1. When an amp is coded to my M Coupe, it will sound poor in both cars. 2. When an amp is coded to my wife's 3.0i Roadster, it will sound great in both cars. I had some long conversations with the Tech and SA and we have come to some possible conclusions.. He said that he knows that BMW has had coding differences between Coupes and Roadsters. (even with the same systems) He knows this to be the case with newer 6 series cars.. He said that he feels that Roadsters get more powerful audio systems due to the fact that you need it when rolling at 70 MPH with the top down.. With respect to our Z4s, he feels that the Coupe gets coding that scales back the power.. The problem is that the Carver subs need this power, and sound like chit without it! He also said you can't trick the software into thinking that my Coupe was a Roadster.. So basically I have to make sure they never code the amp that is in my Coupe.. The computer will ask for it if I ever need anything else programmed or reset.. Both my cars sound good now, so I will take that as a win!! Currently my wife's original amp is in my car and sounds great.. Chris Fine's old amp is now in my wife's car and sounds great (after coding).. My warranty amp replacement is in my closet and would sound like crap in both cars since it it currently coded to my M Coupe.. My brain is fried, and it is time for a beer!! |
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02-04-2012, 07:40 PM | #46 |
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After talking to MHeavNC I think we may have a problem. Hopefully I can convince my dealer to recode my amp to a non-nav roaster code. Just dont see him going fot that. Or i could bitch more and get a new amp and still have the same low power low volume distortion problem in back with the coupe coding. UGH
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02-04-2012, 08:18 PM | #47 | |
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Since I haven't heard your system, I can't say for sure that you have the same exact problem I have,.... but I am leaning that way.. Have you ever heard a roadster's top hi fi premium system? Last edited by MHeavNC; 02-04-2012 at 09:32 PM.. |
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02-04-2012, 11:16 PM | #48 |
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Anyone that has a roadster near north nj area and wants to let me borrow your car to code my coupe amp, there could be a LOT of beer in it for you.... or Macallan.... you pick. I want to try this code swap on my amp too.
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02-05-2012, 01:43 AM | #50 |
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I think it might be more than just a power issue, I bet they've done some messing with the EQ because the Coupe is a different environment than the roadster. The front kick panel woofers put out a lot of the bottom end in my car, with the Carver subs adding low punch like bass drums. Even with less power to the Carver's, the front woofers should be putting out some decent bottom, unless they've messed with the EQ and power to those as well. Regardless, sounds like you've solved the issue. I know my system sounds very good for a factory system, and it's loud and deep. It has TOO much bass when set "flat". My friend who has a 2007 Z4 M Coupe was amazed when I demo'ed it for him. His Coupe apparently sounds just like yours did.
John |
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02-05-2012, 02:50 AM | #51 |
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Thanks for your post John.. If your friend was blown away, I am almost certain his sounds like mine did.. You are probably right about the EQ settings.. Before it sounded like my mom's 85 Ford Country Squire.. Now it is on par with some of the better factory systems that I have heard.. I can just crank it up!!!! Only the mids are lacking a bit.. I may have to get the Stage 1 BSW upgrade.. Maybe two of them.. Gotta keep the Honey Badger on the Honey side, or I will be sleeping on the couch!
BTW, this forum ROCKS!! |
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02-05-2012, 03:24 AM | #52 | |
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02-05-2012, 10:59 AM | #53 | |
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Yep. Had a 2006 z4m roadster before this one so I know the diff. Mine had nav. Totaled it. Wish I would have snagged the amp out of the back.
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02-05-2012, 11:02 AM | #54 |
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Im just gonna say fuck it and drive it. Let the sound of the Gruppe M and the eisenmanns be my stereo.
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02-07-2012, 09:20 PM | #55 |
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I am double posting this because it directly pertains to the issue in this thread:
"Top-HiFi Amplifier: With regard to its functionality, the Top-HiFi amplifier corresponds to the previous DSP amplifier as already used in other model series. The special features on the E85 are the two high voltage output stages (30 V) for the Carver woofers... . . . ...Due to the greater diaphragm displacement Carver woofers (low-range speakers) require a higher voltage supply than conventional speakers. A special DSP amplifier with high voltage output stages (30 Vrms) is required for the Top-HiFi audio system." taken from: http://www.billswebspace.com/A18%20Amplifier.htm I think this is further proof that the amp is probably coded differently for an e85 vs an e86, with the e86 coding lacking the right amount of power. would be great to swap amps with an e85 for 10 minutes to confirm again what MHeavNC did. if it does work, then off to get it recoded. somehow. Macallan anyone?
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03-19-2012, 11:15 PM | #56 | ||
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I wonder if that amp might have servo control that is adjustable with coding and that might be a cause of flabby bass. Having this capacity in the amp might allow BMW have some enclosure volume flexibility as they could, within limits, adjust the Q of the subwoofer. |
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03-20-2012, 07:13 AM | #57 | |
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03-20-2012, 10:15 PM | #58 | ||
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Anyway a very interesting thread. There has to be something going on under the covers because, while each person's hearing is different it's not as different as I have been reading here. One person says they have no bass and other folks have too much. The disparity in the comments is just too wide. And most of the folks making them sound like they have a healthy audio interest. |
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03-20-2012, 10:29 PM | #59 | |
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03-21-2012, 12:03 PM | #60 | |
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Come to think of it there are three possible memory settings on the equalizer. Coincidence? |
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03-21-2012, 09:47 PM | #61 | |
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03-27-2012, 10:17 PM | #62 |
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I routinely take a 450 mile road trip in mine. Whenever I leave the volume is not very high. By the time I have gone about 100 miles I have it really cranking and the bass is much better. I sometimes wind up with it flat at that level. And sometimes I tweak it with the tone controls usually by only one click.
BTW, did you notice that, although the equalizer is source independent, the tone controls are not-the settings for each source are remembered for that source. |
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01-16-2013, 05:59 AM | #63 |
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Hi, I just bought a 08 Z4M coupe with sat nav few weeks ago. I found this thread and it is exactly the same problem with my car. Can't stand the bass anymore but don't have the luxury to swap amp with anyone. Does anyone know if I can hook up an aftermarket amp to solve the M coupe coding issue?
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01-16-2013, 09:17 AM | #64 |
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The quick answer to your question is "No". The head unit in your dash communicates digitally to the multi-channel amplifier in your hatch. You can't just insert another standard amplifier in place of the BMW amplifier (that would be too simple and obviate the need for all these nifty discussions). Welcome to the world of BMW audio.
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01-16-2013, 07:00 PM | #65 | |
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Quote:
http://www.zpost.com/forums/showthread.php?t=656683 (could skip to post 60 where the problem starts to get easily solved.)
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01-16-2013, 09:20 PM | #66 | |
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