Standard Audio Specs?

[Epacy]

Originally Posted by cardebt

Not to be a poser, but I do preferr the look of the "unique speaker grills". Does anyone know if they can be purchased seperately and if they are uniform in size for easy instalation?

Total poser!!!

[eclipsisNA]

I can chime in on this as I have HK in my 05 M3 and I've spent some quality time with 752 in my father's 08 M5. In the M3, taking the volume to a certain level gives severe distortion and gives off an annoying rattle throughout the car. 752 doesn't distort in any sense even with max volume. It's equally clear and balaned whether on max volume or mid volume. The two subs under each front seat are very impressive as well in terms of offering a deep, firm bass that doesn't shake the frame of the entire car.

[dan6470]

So why does the entertainment section for the M3 on the BMWNA website state Logic 7 (13 speakers)??

[drvai]

Originally Posted by dan6470

So why does the entertainment section for the M3 on the BMWNA website state Logic 7 (13 speakers)??

It's not available in the US, but it is in the rest of the world.

Hope that clarifies...

[dan6470]

Originally Posted by drvai

It's not available in the US, but it is in the rest of the world.

Hope that clarifies...

I understand that....but I'm talking about the US site!

[footie]

Originally Posted by Technic

The base M3 sound system should be the one in column 2 in this chart:


http://www.e90post.com/forums/showpo...71&postcount=2

There are 2 8" shallow subs under the seats:

So am I right in saying the the Hi-Fi setup is the Logic7 and the top Hi-Fi setup is the individual. So where is the 676 setup in the chart.

[Technic]

Originally Posted by footie

So am I right in saying the the Hi-Fi setup is the Logic7 and the top Hi-Fi setup is the individual. So where is the 676 setup in the chart.

No, Top HiFi is the Logic7, HiFi is the standard system in the E9x M3.

The Individual Audio is not in that chart.

[GarryF]

Originally Posted by Technic

HiFi is the standard system in the E9x M3.

Isn't that only standard in the USA, in europe the M3 gets the basic stereo with 3 different upgrade options.

[footie]

Don't like 2ohm setups, usually make the sound a little bright for my liking.

So re-cap: HiFi is the 676 option which if I remember right doesn't have a centre speaker. So basically the only different between it and the Logic7 setup is 3 extra speakers, a bit more power and the Logic7 system itself.

Has anyone compared the 676 system to the Logic7 to see if the extra dosh is worth it?

[Technic]

Originally Posted by GarryF

Isn't that only standard in the USA, in europe the M3 gets the basic stereo with 3 different upgrade options.

Yes it is; in the USA E9x M3 there's HiFi as standard, Individual Audio as the sole option. No Logic7 is offered so far as an option.

[badfish]

Originally Posted by footie

Don't like 2ohm setups, usually make the sound a little bright for my liking.

Impedance has nothing to do with systems sounding bright. Anyways, back to the topic.

[GarryF]

Originally Posted by Technic

Yes it is; in the USA E9x M3 there's HiFi as standard, Individual Audio as the sole option. No Logic7 is offered so far as an option.

And just to confuse things even more BMW don't use the name logic 7 in the UK anymore, they call it "Hi-Fi system, pro DSP"

Footie, I've been in various cars with the base system and was in a 6 series that has the hi-fi system as standard and noticed the difference, I've ordered the logic 7 system so will let you know when it appears

[footie]

Originally Posted by badfish

Impedance has nothing to do with systems sounding bright. Anyways, back to the topic.

The systems I am referring to are Rockford ones. Maybe it's the install but to me I didn't like the overly bright sound that was present as the volume was increased.

[Technic]

Originally Posted by footie

The systems I am referring to are Rockford ones. Maybe it's the install but to me I didn't like the overly bright sound that was present as the volume was increased.

One possibility: if you replace 4 ohms speakers with 2 ohms and leave everything else in the system the same you effectively are doubling the current load in the system. Thus it is possible that that "brightness" is simply amp(s) gain adjustment or amps that are not stable at 2 ohms.

[footie]

Originally Posted by Technic

One possibility: if you replace 4 ohms speakers with 2 ohms and leave everything else in the system the same you effectively are doubling the current load in the system. Thus it is possible that that "brightness" is simply amp(s) gain adjustment or amps that are not stable at 2 ohms.

Sorry guys, didn't want to steal the thread and take it in another direction.

I always believed that Rockford kit was designed to run in 2ohm form, one amp running a multitude of speakers. Don't know if it's just their brand but at low/normal volume levels things was quite decent but as the volume increased so did the brightness, maybe there was too many mids and highs in the setups over subwoofers but I wasn't too impressed.

At least the BMW system has numerous amps for certain speakers so probably everything is just fine. If the Logic7 is remotely as good as my B&O setup in the S5 I will be happy enough.

[Technic]

Originally Posted by footie

Sorry guys, didn't want to steal the thread and take it in another direction.

I always believed that Rockford kit was designed to run in 2ohm form, one amp running a multitude of speakers. Don't know if it's just their brand but at low/normal volume levels things was quite decent but as the volume increased so did the brightness, maybe there was too many mids and highs in the setups over subwoofers but I wasn't too impressed.

At least the BMW system has numerous amps for certain speakers so probably everything is just fine. If the Logic7 is remotely as good as my B&O setup in the S5 I will be happy enough.

Adjustment all across the volume range, is what is called...

[footie]

Originally Posted by Technic

Adjustment all across the volume range, is what is called...

Please explain what you mean so I can understand a little better, I was assuming that it was that subwoofers in general require a lot more power from the amp accordingly than either the mids or highs and because of the one amp setup the subwoofers were being lost in the mix. I understand that the midrange is the most important to get right as it's the one the human hear is most sensitive to because we are designed to hear speech.

I know this conversation is way of topic but we you rate multi amp much better an option in a car than a single amp setup. I see heat is the biggest issue to a single amp setup as the lower the ohms the more the amp has to work and the harder it works the hotter it gets, do you agree.

[badfish]

This is getting way off topic, I've spent decades in autosound and competition. As impedance drops, the only thing you can say is in general that THD goes up. And it's not even to a point where it can be heard. We're talking fractions of a percentage. Sound quality has almost nothing to do with impedance. The linearity of the system will be the same regardless.

footie, whatever difference your hearing is due to everything except impedance. Just didn't want to leave the readers misinformed that 2 ohms sound any worse than 4 or 8 ohm systems. I can spend paragraphs explaining why but this is an M3 forum and my baby's got a V8 that is gonna rev up to 8400 RPM and make some music that can't be compared to. I'm too old to participate in these debates nowadays...

[808MGuy]

Originally Posted by footie

Please explain what you mean so I can understand a little better, I was assuming that it was that subwoofers in general require a lot more power from the amp accordingly than either the mids or highs and because of the one amp setup the subwoofers were being lost in the mix. I understand that the midrange is the most important to get right as it's the one the human hear is most sensitive to because we are designed to hear speech.

I know this conversation is way of topic but we you rate multi amp much better an option in a car than a single amp setup. I see heat is the biggest issue to a single amp setup as the lower the ohms the more the amp has to work and the harder it works the hotter it gets, do you agree.

It sounds like you are assuming that single amp means 1 channel of amplification which is not the case. The single amp system still has multiple channels of amplification. It's just housed in one common case. Like badfish is saying, sound quality and impedence have almost nothing to do with each other unless the amp is driven into clipping by the low impedence load.

[Nucking Futs!]

Originally Posted by Technic

The base M3 sound system should be the one in column 2 in this chart:


http://www.e90post.com/forums/showpo...71&postcount=2

There are 2 8" shallow subs under the seats:

I know this is an old thread but need to confirm...regardless of base or Enhanced Premium stereo system, is there a difference w/the subs in the seats w/each version or seat subs are the same regardless? Thx!

[Technic]

Originally Posted by Nucking Futs!

I know this is an old thread but need to confirm...regardless of base or Enhanced Premium stereo system, is there a difference w/the subs in the seats w/each version or seat subs are the same regardless? Thx!

Subs are the same size regardless, the specs are different: HiFi's are 2 ohms, Individual's most probably are 4 ohms, power handling should be more than double in the Individual's.

[footie]

Originally Posted by Technic

Subs are the same size regardless, the specs are different: HiFi's are 2 ohms, Individual's most probably are 4 ohms, power handling should be more than double in the Individual's.

I looked this up and the smaller the ohms to louder the sound if the amp normally running 4 ohms with 4 ohm speakers, can't tell if it doubles but it is louder.

This might expalin why the individual can cope with twice the wattage.