Harman/Kardon Logic7 Speaker Repair and Sound Test
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- čas přidán 28. 07. 2024
- In this video I repaired Harman Kardon Logic 7 Mercedes Speaker and then sound tested it. Check out my other videos and subscribe for more!
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This is called an "Inverted" topology for the woofer components; the coil extends from the front of the cone so that the magnet can be placed inside the void of the cone. This works well at low frequencies but not so well for midrange and high frequencies, so it is normally done for woofers. But it also provides the most benefit on woofers, because they normally have more physical depth. Also - the discoloration you notice on the cone, dust cap, and spider is due to many years of exposure to ultraviolet light, which attacks the dyes in the cone and causes it to become hard and brittle, and it also does the same to the foam surround. Harman, Bose, Alpine, ASK, Panasonic, and PSS all produce some inverted-style subwoofers.
Very nice, for a second it reminded me of the Cerwin Vega stroker!
My Stoner Mind *cat appears*
Except the magnet is in Front of the cone
My Stoner Mind how I found your channel 1 year ago
So c
Wow! Amazing how you repaired the speaker.
amazing repair! :)
Thank you! :))))
Thanks for the tutorial! Man my w204 Benz speakers started to smolder and a smoke smell came out the dash and on the rear speaker.
Luckily I found one reasonably priced online.
Like that intro song by the pharcyde (Bullshit)! Keep bangin'
Hello jakim innym głośnikiem moge zastąpić ten który regenerowałeś
Hello!!
Can you help me fix mine, i have no
sound
While connect with bluetooth or aux
Onyx Studio 7
What is the ohm of this subwoofer supposed to be? Great video by the way !
*How many Ohms does this exact one have??* Thanks in advance
good stuff ! I would like to check my merc subwoofer where is the location of that thanks!
Rear middle center in trunk for my son's c230 sport. If you mean the amplifier. parts.smithmercedesdealer.com/v-2005-mercedes-benz-c230--kompressor--1-8l-l4-gas/body--sound-system
Should I repair or replace my blown HK L7 speaker in my Benz? Please help!
Repair it or get exact same one. If repairing doesn't cost you too much then repair it.
nice video .. i saved 150$ thanks to you
Hi, I have a problem with the H K system in my 2006 CLS. The bass power weakens after a short time I turn the music on. If I disconnect and reconnect the battery, it’s fine for a while but then it starts again, sometimes it only takes 5 minutes and other times I get up to an hour of normal function. The front door speakers loose the bass power the most. Could it be the amplifier failing, or can the speakers cause this as well?
Many thanks!
I think it will be failing amplifier. But if bass stops abruptly then it might also be speaker.
@@AudioTherapy0 Thank you! Bass is still there but not that sharp as it is when the battery is reconnected. It sounds more like an average audio system.
Are these amps serviceable?
Many thanks!
@@W15Garage these amps are not serviceable, they’re run off of optical (laser) cable, and you are incredibly hard pressed to find anyone with the rig to diagnose them like that.
Most just swap out the failing amp.
That being said, the front drivers are pushed semi-hard on a fair bit of bass frequencies, and the amplifier does have LF/RF/LR/RR channel specific protection circuits to protect the drivers from outright blowing up. If your amp is cutting out only one driver, there’s a likelihood the glue holding the cone to the spider has failed, and the voice coil is very possibly beyond saving.
Infinity is owned by Harman Kardon, as is JBL, both the Kappa line from Infinity, and the older GTO line from JBL are modernized variants of the drivers that went into these Mercedes. Use an OEM, or replace them with the drivers listed above to rule out a failing amp.
The amps in these cars do often fail mechanically from liquid exposure, and electrically from having too many protection incidents. Logic 7 system is Audio 50 option for Benz, if you’re getting a replacement amp, verify the VIN number has that option listed under the build sheet on VinDecoderz.
@@bleachstain9785 Hi, thanks for your reply, it makes sense! Could you please advise what are the ohm specs for the front door speakers? Also if you happen to know an exact speaker model from JBL that would be a good fit, it would be greatly appreciated.
Thanks
how do you put spider back in place after adding glue? There is no space to press it down
I don’t quite remember how I did it but I struggled. If I remember correctly I pressed it down with bent tools and 90 degree tweezers. Thanks for watching!
Hondita accord ²⁰¹⁰, i know i have some like this in my chicharrón, but *i wanted to type some'n to tanks this guy good video and the good way his answering in the comments to the cuestions...👍*
Wow, I've never seen a speaker of this kind very good tutorial !!!
What is the name of the song at 3:15 / 7:47 on the video?
Like!
canal apenas um tanker Thanks! Music is: Joakim Karud - Love Mode
Thanks for the music and the tutorial I just arranged one more of my speakers!
canal apenas um tanker You Are Welcome! :))
canal apenas um tanker darude sandstorm
What speaker I can replace this to give me a better sound
Thanks
Infinity Kappa or JBL GTO line
Great joob!!
Thanks!! :D
I have a Bose Woofer with similiar technology!
*job
Why did the thumbnail says "MUST SEE!"???
Because it is very unique and strange speaker. :))
i wanna take that stock sub out and put another 10 in my benz , along with my 2 12s
Hello, do you know if this is a 4ohm speaker?
I don’t know. May have been 2ohm.
that was a 4 ohm speaker , you can see on the multimeter ( if it was set on the 0-200 ohm position ) DCR 3.6 ohm
Hi, the car is W221 s500 2005. I bought the car with this problem and so far I can't find a solution and cause. The system is Harman/Kardon Logic7 and it works differently every time the car is started. Sometimes everything works normally, but on the next ignition, only the rear left door and subwoofer work. i will be glad if someone can help me with advice on what and where to look.
I replied to Vilimos above in the main comment thread.
My comment there will pertain to your issue as well, but it sounds like a failing amplifier may be the cause of yours. Although you can diagnose that it’s not the laser input cable by going to the drivers rear in the trunk, pulling the panel off, and locating the orange plug for the laser connector, wiggle it and the cable running out of it about ONLY A LITTLE (It’s very fragile) while you have music going and someone to listen in the car, if there’s changes in the audio from that then you need a new laser cable, which is on a giant laser loop in the car and costs almost $1,200 for replacement.
If that is the case, you’d be better suited spending that money on an aftermarket headunit, and a 4/1 or 6/1 channel aftermarket amplifier to drive the speakers and subwoofer.
Best of luck, and update me in this thread if you need any further help.
Is there any good aftermarket supwoofer that fits in the whole? 500-1000W would be great
Infinity Kappa 8” or 10”
Infinity Reference 10 7/16”
Closest to stock power specs you’ll get with a focus on sound quality and sensitivity.
@@bleachstain9785 Could you technically just replace the speaker by itself without having to worry about getting an amp for it or changing any of the wiring out? I really don't wanna have to take the car apart to replace a blown speaker. That infinity kappa 8'' looks great
@@AngryLoser9690 yes, I did not add an amplifier to my 8 inch Kappa, however I did have to make an adapter plate to fit the factory mounting location and I did have to cut out a hole and what would’ve been the factory subwoofers grill from the sheet metal given how the cone was oriented.
It’s just as loud if not a little louder than stock, clarity has significantly improved. That being said when I had the sub out I discovered a dead sub channel on my amplifier, so the Kappa will gladly take half of the factory power and still sound just as loud, with a significant uptick in clarity and responsiveness.
@@bleachstain9785 Do you think I could find a sub that's shorter in length so I don't have to cut a hole through the grille in the back? Or are you talking about the grille that's underneath the sub in the trunk?
@@AngryLoser9690 i’m talking about the grill that’s in the trunk underneath the sub, the cone on the factory subwoofer is mounted facing the trunk.
Infinity makes two different 10” reference series drivers that will fit, both of them are shallow mount and will not necessitate cutting out that metal grille.
How much it cost to repair one of this
it's not worth repairing , as you can find a lot of good working ones for cheap on ebay , a sub speaker like that ( even newer and more powerful with a neodymium magnet ) for 20 - 30 usd !
I don't know if someone have compare have bose before,i did it and bose actually sound better for me,more natural
stanley chin the best soundsystem in cars is the bang&olufsen in the new audis.... sounds really really good
Upside down cone!
Where the magnet?
It was on the top
Excellent video, one of the best I've seen on CZcams. I'll be going into my HK 7.1 speakers in the near future so I ordered up a frequency generating cable for my phone and the proper glues for doing the job. I loved the sound when I got the car but it has degraded over time. New speakers are unobtanium so repair is the way to go, and, to be honest, it's probably preferred. In my research I found that if you made a 3.5mm adapter cable for your phone, and put out a 50Hz continuous tone, you can adjust the spider when you are gluing it so that the voice coil does not rub. This seems to be preferred over shimming and looks easier. There's a video on that here => czcams.com/video/NpMYZq-qQNo/video.html
I haven't done the job yet but your video will help a great deal. Thank you for making it !!
გრეით ვიდეო
It reminds me of the stock door speakers in a 2006 ford fusion
Hey nice video i have the same speaker on my mercedes w209 clk 350. One question i have been having problems with the speakers because it was sounding like crap (that brrr brrr brrr you know ), i took it off and it seems that the glue expired and i need yo glue it again. What kind of glue do you recomend? What glue did you use? Big thumbs up and thank you in advance.
This speaker had very strange wax type of glue and that made impossible to glue everything back until I totally cleaned that old glue off. I use russian made glue “Moment”. But you can use something different like epoxy glue. Thank you :))
Audio Therapy perfect!!! Thank you very much!
@@AudioTherapy0 I know I'm super late here, but can you please give some advice on how to remove the speaker from the car? My cone is separated, like yours was. It makes it sound absolutely terrible. Especially on certain songs..
Hey bro,just saw the video,I was wondering what you used to dissolve the glue ?
+PetruV Hi there! I didn't dissolve the glue because that glue was like paraffin and it came off very easily. In some cases when speaker parts are glued with epoxy, i use hair dryer or heating gun to loosen that epoxy. If it is just a regular speaker glue, then I use acetone. But keep in mind that the acetone can damage plastics and some materials that are sometimes used in speaker.
A small doubt about my Similar 8 inch subwoofer is that it has a lot of mechanical excursion noise...like grinding noise...when it's operating under substantial pressure and input load power.
Should I reduce my input level (gain)? Contrarily, I have heard that we need to feed good power to the driver unit?
Please help!
Is it in the box?
@@AudioTherapy0 Yes, it's a Alpine PWE-V80. A powered Subwoofer. The input gain that i was talking about is from my aftermarket head unit. I control it that way by keeping off the Remote knob dialed all the way up. It just gives me a bit better control in unit numbers.
However, my point is when my 'loud' is ON, the music sounds richer through the speakers but acts as a bass boost to my sub.
Now, the gain is set at 75%. But not until after having been half way up in the Volume level does the bass really kick in from the sub unit. Any clue?
Its hard to tell what makes that noise in subwoofer without listening it.
@@AudioTherapy0 Alright, thanks very much. 😊
@@bommareddybrijendrareddy9301 gain is not a volume knob, it adjusts input sensitivity (the amount of power coursing through your RCA’s).
Too much power, it’ll start to sound like crap, aim to have your gain set between 30-50% and use an equalizer to boost narrow bands of frequencies to achieve the effect you desire.
Where’s the removal and installation video?
what glue do you use to stick it back together again
I used Speaker Repair Adhesive, Foam Edge, Spider, High Strength, Clear, MI-3035 from Amazon , costs $8 only. Works fantastic.
Magnet on front realy wird
whats the song on the background?
The background song is "Longing" by Joakim Karud and the test song is "Feel Good" by Syn Cole..:)
Oh by the way the intro song is "Bullshit (instrumental Version)" by J Dilla...:)
Joakim karud longing
I keep getting a rattling noise, is this normal in my E320?
No. Its not.
Do you know what it may be?
It may be number of things. It may have rotted out surround or some part may be detached and needs to be glued back
I have a 2009 MB C350 with the Harmon Kardon system and the main speaker in the driver's door has started rattling-I fear it's voice coil is fried. Are replacement speakers expensive and/or difficult to find?
It can’t be fried. Looks like some part detached and needs gluing back.
I thought that Logic 7 is a BMW's exclusive audio system...
Harman/Kardon Makes Logic7 Sound System For Both Companies.
What do you think about the Harman/Kardon in general? Is it a good idea to buy one of their modern systems?
I really like harman/kardon they make very unique and high quality speakers. I think it will be good idea.
Because I am barely confused with my Edifier 530D, and now, I am saving money for something "branded". ...