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A cheat

Listed below is a list of the tweaks and settings that I have made to the system, which has had a very positive impact on the sound quality:
I just scanned over this thread and counted 10 people with the same rattling/buzzing issue on the passenger side at low frequencies. I'm now adding myself as #11. Seems obvious something is going on. Interestingly, another member on the thread titled "Standard Audio or Harmon Kardon" posted that he also had the issue, brought the car in, and the dealer fixed it. So that gives me hope it can be resolved.
I only started noticing the issue this weekend (I've had my car since May), after messing around AGAIN with the audio settings to try to improve the sound.
I was following the detailed steps set out by bigk200 who suggested de-emphasizing the driver's side speakers and switching off surround sound.
Rather then go through the elaborate taping and covering of the speakers that he suggests, however, I cheated a little and merely shifted the balance one notch over to the passenger side. That, combined with turning off the surround sound definitely helped - at least from the driver's side only. Big thanks to bigk200 for figuring out what to do. Now I've got to resolve my buzzing.
 
I am hoping someone that purchased the service manual, can post the page that shows how to remove the door panel.
I am sure there are a few hidden screws under covers that need to be popped off, and then the perimeter of the door would be pried off with a Y removal tool - I just don't want to experiment and start trying to pop the covers off in the wrong spots and they break.

One the cover is off, it should be relatively easy to come up with a fix, or see what may be loose or rattling - perhaps some sound deadening/anti rattle material could be added.
 
Put me on the list, mine rattles as well, however i don't find it happening often enough to be overly annoyed by it, but it still would like to have it addressed if possible.

On a separate 'issue' I just noticed how the lack of real power from the amplifier. Didn't notice until my wife turned up the volume on a song she liked and it was almost to the max. After on a separate occasion I turned the volume up as loud as it could go and it was surprised that it was actually tolerable still. This might be the only car stereo i've ever had where you can turn the volume up to max and it's not ear bleeding loud. Not that I want it to be ridiculously loud, but this amp is just plain underpowered. Can the amp itself be changed for a better one? Or maybe add a separate amp to power the 'subwoofer' (what a joke) since lower frequencies take the most power.
 
isn't it possible the Amp is oK but the speakers have a very low "sensitivity:?

From crutchfield:
Sensitivity measures how much sound a speaker yields from the power applied to it. If you have a low-powered car stereo (15 watts RMS per channel or less), like most that are factory-installed, speakers with high sensitivity ratings (over 90 dB) will make the best match. If you have a high-power system (16 watts RMS or more), like that provided by an aftermarket stereo or external amplifier, then consider speakers with lower sensitivity ratings. Properly powered, they'll provide excellent sound quality.
 
See mibi you are spot on that's what I'm trying to determine is it the amp? the speakers?

I defiantly know I need a sub. Does anyone know the model number of the amp? the model number of the speakers? Maybe then we can research a little more. I visited a couple local audio shops and like I stated before they wanted to revamp the entire system.
 
isn't it possible the Amp is oK but the speakers have a very low "sensitivity:?

From crutchfield:
Sensitivity measures how much sound a speaker yields from the power applied to it. If you have a low-powered car stereo (15 watts RMS per channel or less), like most that are factory-installed, speakers with high sensitivity ratings (over 90 dB) will make the best match. If you have a high-power system (16 watts RMS or more), like that provided by an aftermarket stereo or external amplifier, then consider speakers with lower sensitivity ratings. Properly powered, they'll provide excellent sound quality.
Of course it's possible the speakers could have lower sensitivity ratings, but I would bet the amp is definitely underpowered for the number of speakers that are in the car including the sub, which is 14 total btw, that's a lot of speakers. In a basic 5.1 home surround system an AVR usually only powers the 5 passive speakers while the subwoofer has it's own built in amplifier, this is done this way for a reason. Also, it would be exponentially more expensive to replace all or some of the speakers in the car for speakers w/ higher sensitivity than replacing or adding an amplifier. To be honest, I know a whole lot less about 'car audio' than home audio, but some the same principles still apply.
 
Discussion starter · #69 ·
I have used an ipod with music recorded at very a high level (i.e. loud), and I can say with certainty that the system is capable of producing very high volume. So the speakers and amp are probably not the problem. I think it's the head unit or the software that it is running.
 
bigk200- so you think the preamp out line level output is too low unless a different source like the iPod is used? interesting.... when you play it loud using iPod, how does the system sound?
I went and drove a Giulia this weekend ( still waiting for my ordered car to be delivered) and I felt the HK sounded fine, just that volume had to be turned up..its not anywhere as good as our volvo xc60, or my 997.1 or macan was with Bose, but it was acceptable.. just dont call it a hifi setup!
 
Discussion starter · #71 ·
It's been a while since I listened to the iPod because the system stopped recognizing it. I think this will be fixed if I can ever get the infotainment update. When I played some of the louder music at high volume the system actually sounded pretty good. I could play it loud enough that I could not stand to make it even louder. It was loud. However, the volume is still toward the high side of it's range, and when I played quiet orchestral music I could not make it loud enough to hear over the road noise. But the system can definitely be loud with the right input. And the volume is worst when listening to the radio or satellite.
 
This is good input in tuning the sound system. I agree whole-heatedly with turning off surround sound all it does is muddy up the stereo signal.

I've read a few threads now on getting good performance (or heavily criticizing) the HK sound system and the one point I never see brought up is the source signal. I'm curious to hear what you Alfista's are using for your input. As you know the best audio system in the world can only make a garbage signal sound like, well, really well-reproduced garbage. Radio (which includes Serius XM) are basically sonic crap, severely compressed and clipped. MP3 doesn't fare much better. I can't vouch for ACC as I haven't put it to the test yet, but in theory it should have a much broader range with less distortion and compression artifacts. But still quite a ways off from true audiophile recording.

Personally most of my listening is streamed off Spotify and there is a world of difference in sound quality from that source - although even then you're dependent on what was posted to their library, and it goes all over the place. Anyone out there tried streaming Tidal? I'd be very curious about that.

Interesting times when it comes to our music libraries, don't you think? I'd love to hear your thoughts on this and what you're using.
 
When I first took delivery of my QV I cranked up the bass setting. I have since figured out that doing this will trash the rest of the sound because the amplifier does not have enough power to drive more base, and also because the sub-woofer does not have its own dedicated amp. Furthermore, the sound coming from the woofers (not the sub-woofer, but the woofers) would sound very muddled and imprecise.

Listed below is a list of the tweaks and settings that I have made to the system, which has had a very positive impact on the sound quality:

1.) Turned off the surround sound option. I think it actually degrades the quality of the sound.

2.) I have not done it yet, but I will eventually replace the rear sub with a larger sub and a dedicated amp.

3.) I reluctantly set the bass setting to "0". The overall sound of the system is better when it is not trying to push so much bass.

4.) I discovered that the sound coming from the dash mounted tweeters is way to loud. This is not surprising considering they are firing directly into the glass, which then sends the sound directly into the driver and passengers ears. If I increased the tweeter setting to something greater than zero so that the overall sound would brighten a little, then the dash mounted tweeters would become even more annoying. I had some very thin round black chair glides that I bought from Home Depot with an adhesive back, and so I placed one of them in the very center of each tweeter. The idea was to reduce the sound coming from the teeters just a little bit, and it actually worked. I will probably look for a more permanent solution later on, but the chair glides actually do not look too bad. Before I installed them I stuck them to my forehead first to degrade the adhesive with body oil so that they will be very easy to remove.

5.) After I did #4 above I was able to increase the tweeter setting to +3, which brightened the overall sound of the system without making the dash mounted tweeters way too loud.

6.) I also found that the mid-range sound seemed to be way too loud, and I figured out that my left ear was getting a huge dose of sound from the middle speaker in the drivers door. I did not notice the same thing when I sat in the passenger seat, but it was very noticeable in the drivers seat. This excess sound from that one speaker in the drivers door also made it difficult to choose a balance from left to right in the car, and it made it difficult to find a good setting for the mid-range sound level. After more listening I finally figured out that the sound from the mid-range speaker was too loud because it was firing directly into the side of the steering column. The sound would essentially be concentrated in that space between the door and the steering column, and as a result the drivers left ear would hear way too much sound from that one speaker. I decided to reduce the sound from that speaker by covering up half of it with clear packing tape. I just stuck a piece of tape on half of the speaker, and then used a razor blade to cut a circular perimeter. The clear tape does not cover up the visual aspect of the speaker; it only reduces the sound. This turned out to the be perfect solution to reduce the excess sound coming from that speaker.

7.) After I solved the problem described in #6 above, I then determined that most optimal balance left to right balance was in the middle with equal sound on each side of the car. Before I covered up a portion of the mid-range speaker in the drivers door it would have been impossible to find a good setting for the balance.

8.) Solving the problem described in #6 also finally made it possible to find a proper setting for the fade from front to back. I think I settled on 2 (or maybe it was 3) clicks to the back of the car.

9.) And then after the balance and fade was set I increased the mid-range sound setting to +2. This setting had always sounded terrible until I solved the problem described in #6 above, but now the +2 setting sounds very good.

I am sure that other people will have different opinions regarding the proper adjustment of this system, but this is an accounting of what made the system sound better to my ears. After doing all of these adjustments I think the system sounds pretty darn good, and has eliminated any desire on my part to spend $4 or $5k on a major after market solution. The only thing I would like to do now is spend some money on a bigger sub-woofer with a dedicated amp.
The H&K set-up in the QV is a tried and true system common in a lot of BMWs and Mercedes, and in every one of those set-ups, they sound like crap. Generally they're too bright (too many 4" mids) and lack convincing low end grunt. It's not the speakers that are the problem. It's the baked in factory EQ, and insufficient tone control available to the user.

The only fix I've discovered that can really sort it out is to use an OEM integration amp like the Audison Prima 8.9. The Prima has a Digital Signal Processing stage and a multi channel power amplifier in one small package. While not cheap, in terms of bang for the buck it's a steal.

Here's a full write up and tuning walk thru I did on the HK Logic 7 system in my 2010 Mercedes S550: www.w221audio.wordpress.com

I have an almost identical system in my 2016 C300 www.w205audio.wordpress.com

The QV would set up closest to how the S550 is.
 
It's been a while since I listened to the iPod because the system stopped recognizing it. I think this will be fixed if I can ever get the infotainment update. When I played some of the louder music at high volume the system actually sounded pretty good. I could play it loud enough that I could not stand to make it even louder. It was loud. However, the volume is still toward the high side of it's range, and when I played quiet orchestral music I could not make it loud enough to hear over the road noise. But the system can definitely be loud with the right input. And the volume is worst when listening to the radio or satellite.
I think you are right about this, the lower volume level was when listening to satellite radio. I'll test it with my iPhone direct connection shortly to see how loud it will go. Again, I don't really care about listening at super loud levels, it's just something i noticed about this system.
 
Here is my little update on my door rattle @ certain frequency issue on the HK system.

so I took my car in the dealership for the brake knocking noise and the door panel rattle issues.

Apparently, according to them, the speaker grill was loose. See attached note from my invoice.

After picking up my car, I proceed on playing some music. I'm happy to report that sound has improved dramatically. The 95% of the rattle is now gone. The sound has become more solid.

I can however still hear maybe 5% of vibration but I think that's just the nature of this car along with the lightweight component being used. I can totally live with that.

On the side note, the car was in the dealership overnight, I didn't expect to have such separation anxiety.
 

Attachments

What infotainment version?

After picking up my car, I proceed on playing some music. I'm happy to report that sound has improved dramatically. The 95% of the rattle is now gone. The sound has become more solid.
Did they update your infotainment system version? It does not state that on your service ticket. What version does your car have?
 
First I would like to say hello (which I actually did in relevant thread already ;)

many thanks for the tweaks - I will give it a try.
According to SW swap - I have also AR Giulietta Veloce MY2016 with BOSE sound system, and subwoofer sound way better in that small sister.
Is it a good idea to swap BOSE sw-unit from Giulietta and put it into Giulia (and connect to existing amp)?

[update] - I conducted these tweaks (except SW swap ;) - bass is much better (clearer, more precise) even if eq reduced to +0 - that's great, I can finally hear bass guitar in "hotel california". Highs coming from tweeter are also much less intrusive and disturbing thanks to Ikea pods, even if eq gives them boost +3. Only thing which I don't like (besides two ugly white pods under the windscreen) is sound on the left hand side. Left side sounds "empty", silent, bit like behind the wall. Is it just impression or I used too thick tape (didn't have "stretch" foil) or I covered too much space (it is like 58%-60% of speakers surface covered)?

Did you have similar feelings?
 
I've been trying to fine tune the HK Stereo since I got the car 3 weeks ago.
I'm an audiophile myself; Below are the ideal settings for the HK system in my opinion:

Bass +1
Mid +1
Treble +4
Surround ON

anything above the settings = distortion at high levels
also, I could say that after 3 weeks, Its beginning to sound very decent
 
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