[cecaa850]

Originally Posted by DanG

I didn’t notice any change iin speakers after installing the bypass harness.

Mine are barely audible. I made sure everything was securely installed when I put the harness in. All the bails went completely down.

[18EM2]

Sounds normal to me too after install. Don’t really use the stereo much though

[cecaa850]

I went ahead and sent them an email to see if they've had this issue in the past.

[illingworth22]

I did this removal using the Bimmercode App and it seemed to work fine. What is the difference between both methods?

[boostm3]

Originally Posted by DanG

I didn’t notice any change iin speakers after installing the bypass harness.

Me too.. Volume just Seemed louder because it didnt have to compete with the fake ASD noise.

[cecaa850]

Originally Posted by DanG

I didn’t notice any change iin speakers after installing the bypass harness.

The problem with no sound out of the front speakers ended up being my installation. I installed it on the main amp, not the ASD amp. The ASD amp has a grey connector. The main amp has a black connector. The jumper harness was black as well so that's the connector I swapped. Once I moved the jumper to the proper amp, everything worked as it should. I wasn't aware that the jumper harness had a generic connector and wasn't keyed to only fit one particular amp.

[DanG]

Originally Posted by cecaa850

The problem with no sound out of the front speakers ended up being my installation. I installed it on the main amp, not the ASD amp. The ASD amp has a grey connector. The main amp has a black connector. The jumper harness was black as well so that's the connector I swapped. Once I moved the jumper to the proper amp, everything worked as it should. I wasn't aware that the jumper harness had a generic connector and wasn't keyed to only fit one particular amp.

I am glad that you diagnosed and fixed the problem.

[cecaa850]

Originally Posted by DanG

I am glad that you diagnosed and fixed the problem.

Me too, crap like that drives me crazy till it's fixed.

[cookiesowns]

Originally Posted by ZPrime

No, you don't understand.

The ASD box is also performing EQ and tweaking the volume level of the sound that comes out of the radio, before passing it to the actual amp.

By bypassing it with a harness, you've altered the EQ in the car. This is why I don't like the idea of the harness, unless you're going to completely redo all of the audio (amp included).

Source? The only reason I can think of is that the ASD box performs EQ and tweaking of the volume level is due to the processing it does on engine noise. So turning up the volume of the amp does not increase sound of the engine.

I've had the ASD harness in for quite some time and it actually improved sound quality instead of affecting it.

[BSMF87]

Originally Posted by cookiesowns

Source? The only reason I can think of is that the ASD box performs EQ and tweaking of the volume level is due to the processing it does on engine noise. So turning up the volume of the amp does not increase sound of the engine.

I've had the ASD harness in for quite some time and it actually improved sound quality instead of affecting it.

The ASD harness bypasses the ASD amp thats all, no tweaking done to the audio. Your music sounds better because your only hearing music.

"ASD bypass harness takes the ASD module inputs/iDrive outputs and bypass them into the HiFi/HK(674) OEM amp inputs. For the MOST/digital HK OEM amp, the bypass harness simply makes the ASD module to not output any signal."

[cookiesowns]

Originally Posted by BSMF87

The ASD harness bypasses the ASD amp thats all, no tweaking done to the audio. Your music sounds better because your only hearing music.

"ASD bypass harness takes the ASD module inputs/iDrive outputs and bypass them into the HiFi/HK(674) OEM amp inputs. For the MOST/digital HK OEM amp, the bypass harness simply makes the ASD module to not output any signal."

On the F87 M2 with "HiFi High" or the HK, it is not digital / MOST in anyway. So in this case, it will bypass the ASD output which supposedly has EQ in the 2 series.

That is what I'm referring to to his response.

[boostm3]

Originally Posted by cookiesowns

On the F87 M2 with "HiFi High" or the HK, it is not digital / MOST in anyway. So in this case, it will bypass the ASD output which supposedly has EQ in the 2 series.

That is what I'm referring to to his response.

It might be a distinction without a difference seeing that none of us with HK radio who have installed the harness hear any loss of equalization, and, in fact, if we hear any difference, its an improvement in clarity, not having to fight the ASD noise.

[ZPrime]

Originally Posted by boostm3

It might be a distinction without a difference seeing that none of us with HK radio who have installed the harness hear any loss of equalization, and, in fact, if we hear any difference, its an improvement in clarity, not having to fight the ASD noise.

Sure, but without hooking a scope up to things or doing some double-blind testing, we have fuck-all actual data.

Human impressions are incredibly malleable, especially where music/audio is concerned.

I'm just going off of what I've seen in the regular 2er forums, where they have a lot more eyeballs looking at this stuff than we ///M snobs do.

[boostm3]

Originally Posted by ZPrime

Sure, but without hooking a scope up to things or doing some double-blind testing, we have fuck-all actual data.

Human impressions are incredibly malleable, especially where music/audio is concerned.

I'm just going off of what I've seen in the regular 2er forums, where they have a lot more eyeballs looking at this stuff than we ///M snobs do.

All I know is anyone is going to hear the obnoxious ASD far more than anyone is going to hear any difference in eq from the harness application. Our sensual life is based on what we perceive, not what a scope shows, whatever that may be in this case, which is subject to conjecture since no one has chimed in with a measurement. This is not like the early days of the harness which was built off a faulty BMW wiring diagram. A lot of folks then reported a lack of base which they would actually hear. Nobody so far as I know, has reported an eq problem since the harness application.

[KevM2]

Originally Posted by ZPrime

Sure, but without hooking a scope up to things or doing some double-blind testing, we have fuck-all actual data.

Human impressions are incredibly malleable, especially where music/audio is concerned.

I'm just going off of what I've seen in the regular 2er forums, where they have a lot more eyeballs looking at this stuff than we ///M snobs do.

Just get a Bimmertech amp upgrade and that will boost the existing sound and get rid of ASD

[ZPrime]

Originally Posted by boostm3

All I know is anyone is going to hear the obnoxious ASD far more than anyone is going to hear any difference in eq from the harness application. Our sensual life is based on what we perceive, not what a scope shows, whatever that may be in this case, which is subject to conjecture since no one has chimed in with a measurement. This is not like the early days of the harness which was built off a faulty BMW wiring diagram. A lot of folks then reported a lack of base which they would actually hear. Nobody so far as I know, has reported an eq problem since the harness application.

No argument that the ASD is awful, my point is just that coding off the extra noise may still be "superior" to bypassing the module entirely.

However, I'm not drawing swords and asking for a duel, because I haven't heard the harness firsthand, and I have no concrete proof that the ASD module is actually doing anything EQ-wise -- just what I've seen from other (seemingly knowledgeable) individuals on the 2er section.

[boostm3]

Originally Posted by ZPrime

No argument that the ASD is awful, my point is just that coding off the extra noise may still be "superior" to bypassing the module entirely.

However, I'm not drawing swords and asking for a duel, because I haven't heard the harness firsthand, and I have no concrete proof that the ASD module is actually doing anything EQ-wise -- just what I've seen from other (seemingly knowledgeable) individuals on the 2er section.

Right.. Me too.. Has anybody there taken measurements to verify any negative alteration of EQ post harness? At this point all I can say is i dont notice any difference post harness except for increased clarity at a lower volume due, Im sure, to lack of competing asd drone. Im not saying there isnt an eq change; only that I dont hear one, and havent seen measurements indicating that one exists. So, I guess it will have to remain conjecture until we get some kind of empirical data. Ultimately this will probably be relegated to the great scrap heap of unresolved debates, including now, harness vs coding

[KevM2]

"Things M2 owners say" :

[McGary911]

I figured a lot of the sound improvement is certainly because the ASD isn't there and by that being gone, you have a speaker only doing 1 thing; playing music.

Imagine the same speaker trying to play a violin solo from some orchestra song and fake engine noise at the same time. That's asking too much of any speaker. IT's like trying to drive forward and reverse at the same time.

BTW. I do NOT listen to violin music