Ever seen the speaker for your New G? Its BIG

[Poyzinous]

Thats your premium model Bose speaker. The door panel and frame was actually designed to fit this bigass speaker. Thats one reason why your sound system is so totally awesome.

[smockers83]

Bose factory car audio sucks anyways, for the most part. For the amount that you pay for the Bose name, you could go aftermarket for more and better stuff.

[Poyzinous]

you hurt your car's feelings. The sound is pretty gosh darn good I think. Maybe you should hear the system in another premium car. I was in a friends 330i and It sounded like I was listening to a bunch of prepubescent emo boys thrashing their instruments around in their half flooded basement while the the other half was up in smouldering fire and the electric crackling and power surges were frying every string of flesh remotely close to the source of frantically vibrating resonance in the ambience, perplexing the ear drum and melting away any capability to process sound and rythmic frequency. And then my friend said that you can't really change the way Fallout Boy chooses to play their music, so get used to it or change the station. So I did. And whatever random rap song that was on whatever random station I turned to sounded fairly normal to me. But not nearly as good as it would have sounded on the 14 speaker 5.1 audio setup in the Premium Model M35/M45. But this is about the system in the G37 and G sedans. Really, I think it sounds pretty good. Better than the system in said friends 330. And better than the system in my G35. And I like my system. Its stock. And sounds great.

[pfarmer]

you hurt your car's feelings. The sound is pretty gosh darn good I think. Maybe you should hear the system in another premium car.

But this is about the system in the G37 and G sedans. Really, I think it sounds pretty good. Better than the system in said friends 330. And better than the system in my G35. And I like my system. Its stock. And sounds great.

I believe the issue is that the system sounds accurate. It doesn't have the power to dim the lights with every base note so therefore must not sound good.

My biggest issue with the system is that I feel that the sound deadening is pretty much out to lunch, the doors will buzz, etc. far too easily.

Perry

[joe603]

I like the Bose systems...just need to add a little bass to make it sound great!

[smockers83]

you hurt your car's feelings. The sound is pretty gosh darn good I think.

But not nearly as good as it would have sounded on the 14 speaker 5.1 audio setup in the Premium Model M35/M45. But this is about the system in the G37 and G sedans. Really, I think it sounds pretty good. Better than the system in said friends 330. And better than the system in my G35. And I like my system. Its stock. And sounds great.

Nah, didn't hurt my G's feelings. I didn't get Bose for the reasoning I've already expressed and because I knew I was going to be upgrading everything myself, so there was no point to spend extra money. Plus, I also know that Bose uses speakers rated at 2 ohms, which isn't the industry standard. You lose a little quality as you move down the impedance rating as a sacrifice for more efficient speakers. High quality systems have high impedances.

Don't get me wrong, the non-Bose stock system on mine sounds pretty good, but there are some areas in the spectrum where it lacks. I'm sure the Bose system sounds better than the non-Bose, however, is the marginal increase in quality worth the extra money you shell out? For Bose in cars, my opinion is no.

[pfarmer]

Nah, didn't hurt my G's feelings. I didn't get Bose for the reasoning I've already expressed and because I knew I was going to be upgrading everything myself, so there was no point to spend extra money. Plus, I also know that Bose uses speakers rated at 2 ohms, which isn't the industry standard. You lose a little quality as you move down the impedance rating as a sacrifice for more efficient speakers. High quality systems have high impedances.

Maybe not:

'The point is, the rated impedance IS NOT the same as the efficiency, nor is there any direct correlation between the two. Efficiency of a given direct readiator driver is determined by the folowing relationship:

2 2 B l n0 = k * ------------ 2 2 Re Sd Mas

where k is a constant determined by the properties of air B is the magnetic flux density in the gap l is the length of wire in the magnetic field Re is the DC resistance Sd is the radiating area of the cone Mas is the effective total moving acoustical mass of the driver. So, we can see that by doubling the length of the wire that's in the gap (doubling l) will, by itself, increase the efficiency by a factor of 4, but since Re also doubles, it drops it by half, meaning that, all other things being equal, lengthening the voice coil winding in the gap increases BOTH impedance AND efficiency. Now, there ARE tradeoffs, and everything CAN'T be equal. Lengthening the wire ALSO increases the mass, though the voice coil is only part of a larger mass (it includes the vouice coil former, the cone, and so on) so there is not a direct relation. Also, the gap may need to be widened to accomadte the greater winding diameter of the voice coil, and that may reduce B.'

This quote follows a basic trend of qoutes from experts in speaker technology.

Keep in mind the voltages available in a car dictates to a large extent speaker impedances. Amps with high rail voltages will use higher impendance speakers. High current amps, those with lower rail voltages will utilitize lower impedance speakers such as 2 ohms, or even 1 ohm.

Ever wonder where the magic value of 22.5 watts rms comes from in the typical amps based in head units?

Perry

[Poyzinous]

perry's got you!

[smockers83]

Fair enough, my bad. Haven't done anything major with car stereos since 2002 or 03 so it's been awhile.

I was going from memory from an article (that I refound in a stack of magazines just a few minutes ago) from 2002 and probably haven't seen since then. In trying to remember the article, I was mixing up current and impedance.

Efficiency wasn't exactly the word I was looking for but that was all that I could muster. What I was trying to go for was the system becomes more efficient because instead of a 4 ohm load, you now have a 2 ohm load, allowing the amp to output nearly twice the power (twice the power in a perfectly efficient system).

Maybe sensitivity of the speaker is what I was going for?

However, a lower impedance does reduce sonic quality and detail on a SVC speaker. For DVCs, it's supposed to be the same, but I'm not sure how true that one is.

[pfarmer]

Fair enough, my bad. Haven't done anything major with car stereos since 2002 or 03 so it's been awhile.

I was going from memory from an article (that I refound in a stack of magazines just a few minutes ago) from 2002 and probably haven't seen since then. In trying to remember the article, I was mixing up current and impedance.

Efficiency wasn't exactly the word I was looking for but that was all that I could muster. What I was trying to go for was the system becomes more efficient because instead of a 4 ohm load, you now have a 2 ohm load, allowing the amp to output nearly twice the power (twice the power in a perfectly efficient system).

Maybe sensitivity of the speaker is what I was going for?

However, a lower impedance does reduce sonic quality and detail on a SVC speaker. For DVCs, it's supposed to be the same, but I'm not sure how true that one is.

What flagged this for me is that I used to handle PA systems. I set up PA systems for parades such as the annual Tacoma, Washington daffodil parade as well as the local high school. At the time for example the local high school system utilized 6 - 100 watt rms amps. My job basically was to get the system set up and then to kill an amp or whatever was necessary during its use. 600 watts was more than enough. About this time I came across information on a much larger facility, I think it may have been Yankee Stadium that mentioned that the whole stadium could run on 75 watts due to the type of speakers used.

I know that the speakers for PA have a different purpose in most cases, however it points out efficiency and if you look at their design characteristics you can see the impedances involved.

In cars one of the main determinations is that of the rail voltage present on a given system which dictates the impedance of the speakers used. This in turn brings in many of the other design considerations such as amp placement, etc. due to size considerations, wire sizing, speaker size (not to be confused with cone diameter) etc. Also consider that a speaker of lets say 4 ohms impedance may have an impedance of maybe 40 ohms at various fequencies.

Perry
Modified by pfarmer at 10:19 PM 2/15/2009