SL55/63/65/R230 AMG: Car Audio for SL55
Unless your going to listen to it at standstill.
A typical level of around 70 db of noise is experienced at 70mph, this will
be significantly more with the roof down.
You will also get low frequency cancellations from exhaust and road noise.
At high speed you wont tell the difference. My S Class has a Bose system,
and because the car is double glazed and well damped the sound is OK up to
around 90mph. But here is a test, drive at 90mph with your sound system
at a nice level, leave the controls and stop, you wont believe how loud
and how much more bass you will get at standstill.

You won't believe how crappy the sound is...
My Reus System is worth every penny.
~ Ian
The Bose system in the SL55 has adequate power to play at high levels, but all your doing is competing with background noise, especially with the top down. I should know, I am a recording engineer. And if you play at a level
to overcome background noise you may well be damaging your hearing.
The difference between the S Class and the SL55 is the fact that background noise is much lower, not the fact that it has more speakers.
The Bose system in the SL55 has adequate power to play at high levels, but all your doing is competing with background noise, especially with the top down. I should know, I am a recording engineer. And if you play at a level
to overcome background noise you may well be damaging your hearing.
The difference between the S Class and the SL55 is the fact that background noise is much lower, not the fact that it has more speakers.
The Best of Mercedes & AMG
Let me put it this way, you have a million pound painting, and next to it you have a not so good copy.
In the light it's obvious which one you prefer, but as you turn the light down until it's nearly dark the difference becomes invisible.
We are not talking volume here, were talking frequency response, and at standstill you will appreciate your expensive system sound QUALITY.
But at speed the background noise will do nasty things to your frequency
response. Would you spend 50 grand on a high end system for your lounge,
and have a car reving it;s engine while your listening.
I think you now get my drift,
Let me put it this way, you have a million pound painting, and next to it you have a not so good copy.
In the light it's obvious which one you prefer, but as you turn the light down until it's nearly dark the difference becomes invisible.
We are not talking volume here, were talking frequency response, and at standstill you will appreciate your expensive system sound QUALITY.
But at speed the background noise will do nasty things to your frequency
response. Would you spend 50 grand on a high end system for your lounge,
and have a car reving it;s engine while your listening.
I think you now get my drift,
The Bose system in the SL55 has adequate power to play at high levels, but all your doing is competing with background noise, especially with the top down. I should know, I am a recording engineer. And if you play at a level
to overcome background noise you may well be damaging your hearing.
The difference between the S Class and the SL55 is the fact that background noise is much lower, not the fact that it has more speakers.
If you take superior audio and subject it to background noise, and compare it to inferior/distorted audio and subject that to the same exact background noise, will the sound clarity be the same?
~ Ian
If you take superior audio and subject it to background noise, and compare it to inferior/distorted audio and subject that to the same exact background noise, will the sound clarity be the same?
~ Ian
detail even at higher speeds, however as I said most car noise is caused by low frequency noise from tyres, wind noise, exhaust etc and improving the bass quality will not be noticeable when traveling at speed. I am talking quality not output, you can increase low frequency output but because
you will get phase cancellation and additions it will not be noticeable.
Remember I am talking quality, not quantity. Home audio is quite different
from car audio. recording studios are built to stop outside noise getting in.
Car audio is design to be impressive rather than accurate, and obviously
by exaggerating bass and high frequencies it stands a chance of overcoming
some of the background noise. What I am saying is the standard Bose has
adequate power to overcome background noise, but it's quality will suffer
the faster you go, that would happen to a much more expensive system
as well, apart from some extra HF info. That's why I wouldn't spend a lot
of money on a car audio system.
actually it's very good, particularly at standstill and low speeds, it's only
adequate at high speeds (the quality that is) because of background noise!
- more punchy bass
- clear and delineated lows, mids and highs
- more representation of the highs
- sound "stage" felt more at chest/neck level
I spent a fair amount of time upgrading the system, actually "replacing" is a better word. The only thing of the stock system that remained when I was done was the tweeters in the doors up by the side mirrors.
After I was done, this system consisted of:
- Kenwood's 2nd-to-top head unit
- Upgraded footwell drivers to MB Quart
- Boston Acoustics component speakers to replace the stock ones behind the seats
- Boston Acoustics crossovers to channel the frequencies
- 8" Boston Acoustics sub driver in a custom enclosure I built to fit into the center console behind the seats and replace the stock "sub"
- MTX amp to drive the sub
- Kenwood 4-channel amp to drive the other speakers
This system completely trashed the sound of the SL system, period. Compared to it, the SL's system is indeed poor.
I don't understand why one would try to convince others what they're hearing is gravy when it's not, regardless of whether one earns a living as a recording engineer. Speaking from experience, if you install a decent sub in the car, cross more of the lows into that, manage to lift the sound up above your knees, and get the highs represented, you WILL get a better sounding system, whether at a standstill or on the highway. I'm not trying to tell people what they're hearing is total crap, but much better can certainly be had.
I'm about to pull the trigger on a Reus system based on what I've read in these forums. The only people I've read who trash it are those who don't have one. In the BMW it was much easier to rip everything out and start from scratch, so the component list above made sense. In the case of the SL a more careful approach is necessary because I don't want to go messing with the COMAND unit, so I'm stuck with the audio signals it generates. Seems the Reus system will deliver the sound I want without tearing up my car. It seems those who have the system are very happy. So we'll see.
Last edited by mikeinsf; Feb 13, 2009 at 02:08 PM.
- more punchy bass
- clear and delineated lows, mids and highs
- more representation of the highs
- sound "stage" felt more at chest/neck level
I spent a fair amount of time upgrading the system, actually "replacing" is a better word. The only thing of the stock system that remained when I was done was the tweeters in the doors up by the side mirrors.
After I was done, this system consisted of:
- Kenwood's 2nd-to-top head unit
- Upgraded footwell drivers to MB Quart
- Boston Acoustics component speakers to replace the stock ones behind the seats
- Boston Acoustics crossovers to channel the frequencies
- 8" Boston Acoustics sub driver in a custom enclosure I built to fit into the center console behind the seats and replace the stock "sub"
- MTX amp to drive the sub
- Kenwood 4-channel amp to drive the other speakers
This system completely trashed the sound of the SL system, period. Compared to it, the SL's system is indeed poor.
I don't understand why one would try to convince others what they're hearing is gravy when it's not, regardless of whether one earns a living as a recording engineer. Speaking from experience, if you install a decent sub in the car, cross more of the lows into that, manage to lift the sound up above your knees, and get the highs represented, you WILL get a better sounding system, whether at a standstill or on the highway. I'm not trying to tell people what they're hearing is total crap, but much better can certainly be had.
I'm about to pull the trigger on a Reus system based on what I've read in these forums. The only people I've read who trash it are those who don't have one. In the BMW it was much easier to rip everything out and start from scratch, so the component list above made sense. In the case of the SL a more careful approach is necessary because I don't want to go messing with the COMAND unit, so I'm stuck with the audio signals it generates. Seems the Reus system will deliver the sound I want without tearing up my car. It seems those who have the system are very happy. So we'll see.
Good luck and I hope you enjoy it.
Good luck and I hope you enjoy it.

As you very correctly describe, the advantages will diminish somewhat once on the highway with the top down. That doesn't mean they go away. You'll still end up with much better sound than stock, at any speed.
Last edited by mikeinsf; Feb 13, 2009 at 02:39 PM.
As you very correctly describe, the advantages will diminish somewhat once on the highway with the top down. That doesn't mean they go away. You'll still end up with much better sound than stock, at any speed.
once on the highway, that's the only reason that would put me off buying an
expensive system.I'm glad your buying it for you, and not for demonstrating to all the world. Just a thought, have you ever tried adjusting your current sound system, mine has quite a lot of options.
Well I just gave the deposit for the Reus Audio system, yes they will fly to Puerto Rico for the installation.
Will keep you posted.
I spoke with Cliff last week and told me the same story/details.
I did place the order the first week of February 2009.
He did email me the tracking number of the parts to be installed.
Hope to get the system installed already.
Let's stay in touch.



