Help me love the HK Logic 7 Sound System
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MBWorld Fanatic!
Joined: Jun 2012
Posts: 1,155
Likes: 4
From: SF Bay Area
C55 AMG, 300D-T & Karmann Ghia
Help me love the HK Logic 7 Sound System
Ok, after a full year of ownership, I have yet to find a stereo setting that works with all my music. I'm finding the system in my C55 to be 'boomy' with bass and not really much else...
Although most of my attention has been on performance mods and maintenance, on occasion I fiddle around with audio settings in an effort to stop my front door pockets from rattling every time I turn up the stereo. I have settled on turning bass way down and moving the fader towards the back seat. Maybe I'm just picky, but I don't think a premium factory sound system should sound like I have a 12" sub loose in my trunk rattling off my trim!
My girl's MK5 Jetta has a more balanced sound system!
Now, I am not interested in aftermarket since it is operational and that would mean big bucks- I just need to know if there are settings I should be messing with... btw: I primarily use an AUX in iPod (with no EQ settings turned on)
Although most of my attention has been on performance mods and maintenance, on occasion I fiddle around with audio settings in an effort to stop my front door pockets from rattling every time I turn up the stereo. I have settled on turning bass way down and moving the fader towards the back seat. Maybe I'm just picky, but I don't think a premium factory sound system should sound like I have a 12" sub loose in my trunk rattling off my trim!
My girl's MK5 Jetta has a more balanced sound system!
Now, I am not interested in aftermarket since it is operational and that would mean big bucks- I just need to know if there are settings I should be messing with... btw: I primarily use an AUX in iPod (with no EQ settings turned on)
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Joined: Jul 2008
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From: Va Beach, VA
05 C230K SS (sold), 06 C55 (sold), 08 Yamaha R1 (sold), 16 X5M
there aren't really any settings in the system besides fade and balance and switching between stereo or "Logic7"...I personally think the bass is lacking in this car compared to the equivalent bose systems in infinity or Jeep. Plus I think my sub is coming loose because there is one song that I play that makes something awful rattle in my back dash around the subwoofer area, lol...
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Joined: Jun 2009
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From: Atlanta Metro
Current: C217 V12TT AMG Previously: C55 AMG, SL65 AMG
I've gotten used to the sound over time. I use the surround feature and have the bass and treble turned up some. My doors don't rattle; on occasion depending on the song and if the car has been in the sun the rear sunshade will rattle, and sometimes the front center speaker will rattle at certain frequencies. Some songs have weak bass, others overpowering. Overall I live with it and like the way it sounds compared to others.
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MBWorld Fanatic!
Joined: Jun 2012
Posts: 1,155
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From: SF Bay Area
C55 AMG, 300D-T & Karmann Ghia
I have to get a liner for my door pockets or empty them completely- the rattle is crazy for me whenever something is in there. My girlfriend keeps little trinkets in there to annoy me. My sunshade could also be a culprit since I still haven't been able to get it to go down.
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Joined: Jul 2012
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2013 c63 Magnuson SCed
I'm of the opinion our stock HKs suck. Muddy bass, a lack of strong mids and tinny as Heck highs. We bought the wife a new '02 Passat way back and it's stock Bose sounds much crisper than anything my stereo can do. Occasionally, my bass sounds better, but it's usually too muddy to be very enjoyable. 
I had an audiophile-quality stereo in an ungodly noisy VW some 15 years ago and would kick an old lady to have that in this comparably quiet cabin.
I had an audiophile-quality stereo in an ungodly noisy VW some 15 years ago and would kick an old lady to have that in this comparably quiet cabin.
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MBWorld Fanatic!
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From: Chicago
2025 AMG E 53; 2018 GLC300 4Matic; 2003 360 Modena
The rear sunshade is known to break at the plastic rivets holding it in place. It's a real pain to fix it though. The rear deck is not easy to remove. The rattles in the front doors are the power window switch assemblies.
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2013 c63 Magnuson SCed
Overall, the system's kind of flat and doesn't have enough control to change it. I'd like to start w/ a sub, amp and speaker swap and keep the stock HU, but 8ohms has me concerned.
MBWorld Fanatic!
Joined: Jun 2005
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From: Chicago
2025 AMG E 53; 2018 GLC300 4Matic; 2003 360 Modena
I took my door panels off twice for the various mods that I did. Each time I fiddled with the speakers to fix the rattles, no luck. The third time I used the materials in the rattle kit supplied by MB and the directions given in point 7 from another poster here (not sure of his name, my screen print didn't capture it). Not until I did what point 7 says did I eliminate the rattles in the two front doors. The OP also mentions that it greatly enhanced the sound. quality.
Member
Joined: Jun 2008
Posts: 154
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From: Phx, AZ
N/A
there aren't really any settings in the system besides fade and balance and switching between stereo or "Logic7"...I personally think the bass is lacking in this car compared to the equivalent bose systems in infinity or Jeep. Plus I think my sub is coming loose because there is one song that I play that makes something awful rattle in my back dash around the subwoofer area, lol...
I also agree this Harmon-Kardon system is lacking bass and clear sound compared to the BOSE system they used to use in the C class.
(though not stock)
Junior Member
Joined: Oct 2012
Posts: 51
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From: San Francisco, California
SOLD - 2005 C55
I also had this annoying 'buzzing' sound from the center front speaker. Took to SF MB and they told me it's a fix of $800 ($180 labor+$500~$600 speaker). So I took to mufller shop and took care of the resonator and the problem was 'eased'.
One of these days, though, I'd really wanna new system as the HK system is 7 years old and I'm sure it was much better in 2005.
Rick
One of these days, though, I'd really wanna new system as the HK system is 7 years old and I'm sure it was much better in 2005.
Rick
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Joined: Apr 2005
Posts: 64
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From: Los Angeles, CA
2021 GLC43, 2014 G550, 2000 C280 Sport EX: 2019 C300 Convertible, 2010 GLK350, 2006 C55 AMG
I'm with you on that. So far I've compared it with my old 2000 C280 SS's 8-speaker Bose System and the 2013 GLK350's standard 6-speaker system which I have on loan for a week. The GLK has so so so much bass (sans really low-frequency) that I get a migraine (oh, and it they've built it well with no rattling so far) In my opinion the bass in the 2000 Bose sound system sounds richer and deeper than the HK system. The 2006 HK just lacks.
Super Member
Joined: Dec 2009
Posts: 826
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From: Sweden
2011 C63 AMG, 589hp
I have installed an Rockford amplifier to run all the 4 doorspeakers.Then i have installed an JBL boombox with dual 12" with an Rockford monoblock to run those ones.
now i can play loder so i cant hear the rattle *lol*
now i can play loder so i cant hear the rattle *lol*
Super Member
Joined: Dec 2009
Posts: 826
Likes: 106
From: Sweden
2011 C63 AMG, 589hp
To the right in luggagecompartment i think?
But i connected my line to amps at the rear of headunit.
A bit trickier, but i also connected speakerlines from new amps to doorspeakers.
I didn´t have any subwoofer and amplifier in mine as std, but still Harman Kardon speakers.
I must say.. dammit,, the new amps giving the speakers the juice they needed.
My pants just above my feets are the ones that 'rattle' now,, no sound from them thou
And then the twin 12"s at rear,,,, yeah!!
Really sounds good with good old punkmusic
But i connected my line to amps at the rear of headunit.
A bit trickier, but i also connected speakerlines from new amps to doorspeakers.
I didn´t have any subwoofer and amplifier in mine as std, but still Harman Kardon speakers.
I must say.. dammit,, the new amps giving the speakers the juice they needed.
My pants just above my feets are the ones that 'rattle' now,, no sound from them thou
And then the twin 12"s at rear,,,, yeah!!
Really sounds good with good old punkmusic
