When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Today I finally finalized the installation of the STEG BZN8 bass-drivers.
The sound system in my C300 now consists of the following:
- STEG BZN4C component set consisting of mid-drivers in the doors and tweeters
- Crossover installed between the speakers in the front doors and the output coming from the MBUX
- Burmester mid-drivers in the rear doors
- STEG BZN8 bass-drivers
- Axton A101 mono amplifier driving the STEG BZN8
- Self-made cables both inout and speaker-cables
Hi, I like your approach, I'm the same, not willing to pay for the plug & play and up for the challenge of making it work. I'm across the pond from you in Sweden so I can most likely get the same products as you.
For the foot well speakers, you went with the BZN8 from Steg, I have the basic system too, was the original a 6,5" and the rest just a big bracket?
I have a 3D printer at home and all I need in terms of software and knowledge to make my own brackets if needed. Do you think a generic low profile 8" woofer would be possible to fit with a custom bracket?
My first modification will probably be a high-pass amp and a stand alone sub, perhaps under the seat if it will fit, or in the trunk. Since I have a C300e with the battery in the back, there's really no room to hide a bulky box.
Hi, I like your approach, I'm the same, not willing to pay for the plug & play and up for the challenge of making it work. I'm across the pond from you in Sweden so I can most likely get the same products as you.
For the foot well speakers, you went with the BZN8 from Steg, I have the basic system too, was the original a 6,5" and the rest just a big bracket?
I have a 3D printer at home and all I need in terms of software and knowledge to make my own brackets if needed. Do you think a generic low profile 8" woofer would be possible to fit with a custom bracket?
My first modification will probably be a high-pass amp and a stand alone sub, perhaps under the seat if it will fit, or in the trunk. Since I have a C300e with the battery in the back, there's really no room to hide a bulky box.
I would measure first to see if an 8” shallow would fit. Also run it in winisd to see if it models well within the airspace. I believe it’s somewhat like a sealed enclosure and not IB. I personally bought the 6.5” adapters from aliexpress which I’m surprised by how good the quality is.
I would measure first to see if an 8” shallow would fit. Also run it in winisd to see if it models well within the airspace. I believe it’s somewhat like a sealed enclosure and not IB. I personally bought the 6.5” adapters from aliexpress which I’m surprised by how good the quality is.
Adapters to fit a generic 6,5" in the fotwell?
I've only seen speakers, and most quite expensive too.
Adapters to fit a generic 6,5" in the fotwell?
I've only seen speakers, and most quite expensive too.
Correct. But it’s advised you still run a subwoofer in the trunk. The plug and play options though for the front firewall subs are expensive indeed, and imo NOT worth it unless you’re sure you’ll keep that car for a while. I preferred to run a 6.5” RS6 arc speaker in there instead. Cheaper, better performing, and I can swap it into another car if I wanted to.
Correct. But it’s advised you still run a subwoofer in the trunk. The plug and play options though for the front firewall subs are expensive indeed, and imo NOT worth it unless you’re sure you’ll keep that car for a while. I preferred to run a 6.5” RS6 arc speaker in there instead. Cheaper, better performing, and I can swap it into another car if I wanted to.
correct! I have yet to fit them into the car but will make an update when I do. From what I can tell they should fit fine, including sealing up the chamber well. But you have to add your own gasket to seal it which isn’t a problem.
Where did you get the 12V source from, is there a terminal near by? I assume the 12V battery is somewhere in the rear?
battery is in the rear but you can tap it from the front footwell distribution block. But I am tapping it directly from the rear battery under the trunk floor since I’m pulling like 1800w
battery is in the rear but you can tap it from the front footwell distribution block. But I am tapping it directly from the rear battery under the trunk floor since I’m pulling like 1800w
Were you able to find a good routing for the power through the cabin without too much disassembly?
Were you able to find a good routing for the power through the cabin without too much disassembly?
I ran my power within the trunk since that’s where my amp is (Hard to hide a Sundown Salt 2 amp in the front). And for a smaller amp for the speakers I would still advise to have that amp in the trunk since it would be easier to install and access. If you want to hide the amp, there is a bracket on the left hand side in the trunk behind some carpeting where the stock burmester amp would usually sit. Having a shorter power wire in general is just better and safer overall, even if it’s properly fused with the correct wire size.
Where did you get the 12V source from, is there a terminal near by? I assume the 12V battery is somewhere in the rear?
I advice you to watch the Gladen video on Youtube where go through the process of mounting their speakers and DSP.
This walks you through how to get power to the amp.
I am quite happy with the setup I have now in my C300.
The only thing missing is dampening of the "housings" the 8" speakers are mounted in.
The music I listen to (Rock) can get quite boomy at times because I forgot to add some dampening to those chambers.
I saw a new alternative for front subs, Helix 8", available as 1x2 ohm or 2x2 ohm (S2/D2)
To fit them an adapter is needed that is sold by the same company.
Haven't tried, seen or heard them but will see what my local dealer has available
When adding front door tweeter to basic 5 speaker system, is the plastic cover prepared for the tweeter or does it need to be upgraded to the cover from Advanced system?
Same question for adding mids to the rear door, is wiring and mounting available?
I haven't found any replacement Coax for the rears so I suppose a set of used ones from a Burmester system is the closest to an upgrade.
I think I will go with the Match kit for the front doors and the Helix Ci3 subwoofers upgrades with a non-DSP mono amp from DLS to power both subs with a high to low pass adapter.
Is there a coax for the front, I have only found two-way kits.
But I suppose just replacing the single mid speaker with a better one could be a soution, OEM replacement plastics were a bit pricy, maybe if I can get some used from the scrapper I will consider.
Porsche Taycan, Range Rover AB, Range Rover SVR, S Class, Mclaren 570s, Urus Hybrid (soon), M3, RS6
Originally Posted by RealElwood
I haven't found any replacement Coax for the rears so I suppose a set of used ones from a Burmester system is the closest to an upgrade.
I think I will go with the Match kit for the front doors and the Helix Ci3 subwoofers upgrades with a non-DSP mono amp from DLS to power both subs with a high to low pass adapter.
I would 1000% recommend buying a Match DSP Amplifier and tuning the DSP, at least for the door speakers. When tuning it you have to buy a measurement microphone but it's a fairly easy job once explained simply.
Originally Posted by Ruppia
The same front coax speaker will fit on rear
It doesn't fit on RHD cars, I had to return my coax and I used some audition coaxials with a custom bracket instead
It doesn't fit on RHD cars, I had to return my coax and I used some audition coaxials with a custom bracket instead
Why wouldn't it fit? Door speakers are identical in RHD and LHD cars. Only difference is with front bass speakers, that's why Focal makes them in two versions - one for LHD and one for RHD.
I have replaced factory speakers from Advanced Sounds System with those Focals, but without front bass (yet). Quality improvement is very noticable, but will still need to replace bass, as you can hear that now they are the weakest link.
Go with coax in the rear and component in the front. Component Focal comes with passibe crossover, so no need for any cabling, and speakers fit perfectly in oem places (including front tweeter).
Last edited by Felix2024; Mar 14, 2025 at 04:38 AM.
Porsche Taycan, Range Rover AB, Range Rover SVR, S Class, Mclaren 570s, Urus Hybrid (soon), M3, RS6
Originally Posted by Felix2024
Why wouldn't it fit? Door speakers are identical in RHD and LHD cars. Only difference is with front bass speakers, that's why Focal makes them in two versions - one for LHD and one for RHD.
I have replaced factory speakers from Advanced Sounds System with those Focals, but without front bass (yet). Quality improvement is very noticable, but will still need to replace bass, as you can hear that now they are the weakest link.
Go with coax in the rear and component in the front. Component Focal comes with passibe crossover, so no need for any cabling, and speakers fit perfectly in oem places (including front tweeter).
My car was meant to be an advanced sound car as it's Premium Plus but it only had 4 door speakers and 1 woofer. For some reason the brackets in the rear were different. I put ambient lighting door speaker grills in too (picture attached), I had to screw them in as the rears door cards are also different. My supplier told me that the rear door for certain model cars/years is different but wouldn't expand. I've encountered 1/2 other people who had the same rear speaker mount issue, the Germans that have been doing these builds haven't.
I bought the original Focal RHD woofers to see if I could get them to fit but the front left one is not a "straight plug and play" unless they've made a w206 version in the last year. The top tab of the left woofer needs to be slightly modified, the RHD gladen woofers which I wanted to initially get were released that same day so I changed them for those. Btw I changed every speaker, installed the match8 and put a mille pro d2.3 subwoofer (also attached as a picture) powered by a jl xd600. After DSP tuning this smashes the Burmester 3D I had in my S Class and every factory system I've got in any of my cars.
That's strange about brackets in your car. Never heard about it before, good to know that there might be differences.
As for front bass speaker, yes - there is a new frant bass from Focal dedicated for W206, and also available in RHD and LHD versions. It's has slightly different casing than older version for W205.
I will think about the amp in the future, but i don't know how long i will keep this car. I mean i like it a lot, but thinking of selling it and getting C300d later on, as i'm driving quite a lot recently, so should be better fit for me.
I don't like subwoofers, as they usually tend to give more boomy bass. I mostly listen to rock and metal, where you don't need so much lowe extension, but having wll controlled bass is most important.
Last edited by Felix2024; Mar 14, 2025 at 06:31 AM.
Porsche Taycan, Range Rover AB, Range Rover SVR, S Class, Mclaren 570s, Urus Hybrid (soon), M3, RS6
Originally Posted by Felix2024
That's strange about brackets in your car. Never heard about it before, good to know that there might be differences.
As for front bass speaker, yes - there is a new frant bass from Focal dedicated for W206, and also available in RHD and LHD versions. It's has slightly different casing than older version for W205.
I will think about the amp in the future, but i don't know how long i will keep this car. I mean i like it a lot, but thinking of selling it and getting C300d later on, as i'm driving quite a lot recently, so should be better fit for me.
I don't like subwoofers, as they usually tend to give more boomy bass. I mostly listen to rock and metal, where you don't need so much lowe extension, but having wll controlled bass is most important.
The amplifier is plug and play and can be placed right next to your woofer, it'll be very easy to put it into your next C Class if that's the plan. The power distribution unit, fuse box and the space to take the cable to the head unit is all in that passenger foot well. If you are going to change the woofer in your C300 I would suggest buying a Match 8 or Match 10, the MBUX plug and play loom and a UMIK-1 measurement microphone to tune the DSP with. All you have to do is set the frequency ranges, the characteristic name and play white noise on each speaker. The software will do the rest. It's a big cost but 100% worth it. Also it sounds like the helix front woofers will be more than enough for you, the german forums that I think you said you've read rave about how good they are.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
