Speaker Replacements OEM - Mercedes Benz SLK Forum

SLK R171 General Discussion SLK 200, SLK 280, SLK 300, SLK 350, SLK 55 AMG

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#1 Old 3 Weeks Ago
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Speaker Replacements OEM

Hi, one for the UK owners here. Just to let you know that Mercedes still supply the door speakers ( woofer and midrange with the crossover in a black plastic module) and they are only £64+vat each. I thought they would be much more expensive as ebay has them between £180 and £250.. second hand!.
Bought mine from Merc Leics which were sent up from Merc Germany on VOR.


I replaced them myself this weekend, easy to do, ten mins per door, and to be honest, they sound lovely- (thanks to the site for explaining how to remove the door panels!)


With the roof up they offer a nice smooth and balanced sound (along with the tweets on the door tops). The Audio20 amp is only 20watts per channel so they are never going to 'blow the bl**dy doors off!' but they are surprisingly loud and have a nice bass element to them which compliments the midrange really well.


I had a little Hertz subwoofer installed in the boot last week (I know, I know, old skool!) and it really makes a vast difference to the overall sound with that magical 'punch', so overall I'm a happy bunny.


….just need to dampen the boot with soundproofing as there are tons of gaps that let the sub bass through the car so that's my next project...then after that I'm tackling the install of a new double din headunit…...it's like 1988 all over again!


Thanks.
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#2 Old 3 Weeks Ago
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Quote:
Originally Posted by youarewhatyouis View Post
….just need to dampen the boot with soundproofing as there are tons of gaps that let the sub bass through the car so that's my next project...then after that I'm tackling the install of a new double din headunit…...it's like 1988 all over again!
I’m no expert but if you soundproof the boot. Don’t you need to be IN the boot then to hear your subwoofer?
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#3 Old 3 Weeks Ago
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Slap that Bass into submission!

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Originally Posted by Merc55 View Post
I’m no expert but if you soundproof the boot. Don’t you need to be IN the boot then to hear your subwoofer?

Good point. What I mean to say is that I don't like the bass to be heard outside the car via the boot lid, which is very thin. I also don't like vibrations in the car via the plastic boot / roof / side panels which tends to dissipate the 'punch' of the bass and makes it muddy and boomy.

This can make the bass reverberate far too long instead of a short punch - depending on where your frequency, phase and cut-off are set..etc…. Of course I want to hear it in the cabin , and as it's such a small car, even my small sub-woofer can be heard very, very easily, but I like it to be controlled, punchy, not boomy and kept as much as possible within the car as a whole. I don't want the general public listening to my Steely Dan, TOTO and deadmou5!


I'm no expert either, quite the opposite, but I used to drive a van around London in the late '80s and had a sub in the back that was fun but boomy! My friends taught me about sound deadening the van and sound proofing the panels to tighten up the bass and it sounded much better. Plus it stopped me sounding like an idiot when I drove around sounding like a sonic boom. So I'm going to 'apply' the same principles on my car and see if it helps tidy up the bass, internally and externally. I'm open to any advice on this subject so if you have any experience then please share.
Thanks!
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#4 Old 3 Weeks Ago
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Originally Posted by youarewhatyouis View Post
I'm open to any advice on this subject so if you have any experience then please share. Thanks!
Well true you can dampen the boot to keep it from resonating. If you take of the plastic inner of the bootlid there is plenty of room to install sound deadening to avoid it from rattling. Also the rear side panels can be treated in the same way. You will need to hear it from the cabin so it needs to be loud somehow. I used to have two 1000 watt 12" JBL GTi Subwoofers in the trunk of an XKR convertible. I blew them both in the end after some good years of fun. I also blew up a 1400 watt subwoofer amplifier protected by a 120 Amp fuse. So it will need to play very loud in the trunk to still hear it on the freeway at 100 kmph. I then decided to switch to subs in the cabin. In the XKR I replaced the rear seat with a subwoofer enclosure holding two 10" subs which still looked like a seat cushion. The seat was to small to sit on anyway. In the SLK there is no rear seat so I put the Sub in the passenger footwell. That is a bit of a compromise. For big bass you need a big enclosure. For big feet you need a big footwell.

This is how I did the sound deadening and sub configuration
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#5 Old 3 Weeks Ago
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Hi
Have you still got the "dead speakers" you took out
Sounds silly, but I would really like them
My "does anyone have any dead speakers " thread explains all
Thanks in anticipation
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#6 Old 3 Weeks Ago
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dead speakers

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Originally Posted by pinky4262 View Post
Hi
Have you still got the "dead speakers" you took out
Sounds silly, but I would really like them
My "does anyone have any dead speakers " thread explains all
Thanks in anticipation
Hi, yeah I do have both the original L&R 'door pods' that I replaced but I'm keeping them for the same reason you are thinking of - future upgrade.

Short story, I bought the car in May and both the front bass speakers were busted, one was just dying at any sign of bass and the other was silent. The garage whom I bought it from 'fitted' 'replacements'...took 'em three weeks to source as they were quite expensive. What they actually did was to remove the woofers, then proceed to cut the cage out that supported them, and then screwed in a three way and re fit the door, they also cut off the crossover and binned it! So I was left with a massive midrange sound, no bass and damaged pods. I don't think they thought I was the kind of person to take the doors off and check what had been done. I did that and they hadn't even sealed the woofers in, just screwed them onto the remains of the cage with two little screws and left them hanging there. The sound just bled all over the place and the bass just gave up and floated around the pod and off to Morrisons for all I know.

The speakers 'now worked' and that was that. Hence going to MB UK and ordering the real deal last week.....and what a difference!!

But I'm keeping the original pods as they are, as you say, handy for templates for upgrades and such, the mids are still in them etc.

Shame you didn't live nearer, you could borrow them but Perth is a bit of drive for me

Happy to provide loads of measurements, photos etc...or do something on web ex.

Kind regards.
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#7 Old 3 Weeks Ago
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Woah nelly! streets ahead of my minimal ambitions! haha....awesome job on the upgrade. Unfortunately I got laid off in May so I'm being super tight on money/ toys/ eating haha etc..
I'll have a go at dampening the boot a bit and see if that wins me any benefits. Then perhaps when Im working again I'll be able to do a HU change and give myself more control over what hits the sub - right now it's just a tap off the stereo main outs and only controlled by the sensitivity and cut-off dials of the sub amp......not a lot of finesse there!!! phase seems to do nothing and the freq does very little too...but it's a start.
Right, off to do some damping.
thanks!
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