C43 Burmester Upgrade
#77
Junior Member
750 watts. I have the JL Audio HD750 amp mount in the package tray below the cargo load floor. I’ll see if I can grab a picture. It fits perfectly. The subs I have (in case anyone wants to replicate the set up are two JL Audio cs110lg-tw1
#78
Junior Member
#84
MBWorld Fanatic!
Join Date: Nov 2003
Location: Earth
Posts: 2,233
Received 451 Likes
on
347 Posts
2015 C300 4Matic Sport
Quick question about the JL Audio Fix 82 inputs.
OP used channel 5 and 6 for the subs, but Fix 82 has 7 and 8 dedicated to sub inputs. Why not use those?
it says here :
https://jlaudio.zendesk.com/hc/en-us...channels+7%2F8
Channels 7/8 must be connected to the factory subwoofer signal as it contains a needed Low-Pass Filter. Often times when the OEM system has a dedicated subwoofer amplifier, the amplifier will have some noise well above the range of the subwoofer. This is normally not an issue since the subwoofer can not reproduce the higher frequencies anyway. The only time this becomes a concern is when you want to sum the subwoofer signal with the midrange and high frequency channels to have a full range signal. The noise that would otherwise only go to the subwoofer and remain inaudible will now be added to the main speakers and will be plainly audible. These dedicated channels have built in low pass crossovers that help to eliminate the higher frequency noise before it is summed together with the other signals. This helps to ensure that the resulting full range signal is clean and noise free.
OP used channel 5 and 6 for the subs, but Fix 82 has 7 and 8 dedicated to sub inputs. Why not use those?
it says here :
https://jlaudio.zendesk.com/hc/en-us...channels+7%2F8
Channels 7/8 must be connected to the factory subwoofer signal as it contains a needed Low-Pass Filter. Often times when the OEM system has a dedicated subwoofer amplifier, the amplifier will have some noise well above the range of the subwoofer. This is normally not an issue since the subwoofer can not reproduce the higher frequencies anyway. The only time this becomes a concern is when you want to sum the subwoofer signal with the midrange and high frequency channels to have a full range signal. The noise that would otherwise only go to the subwoofer and remain inaudible will now be added to the main speakers and will be plainly audible. These dedicated channels have built in low pass crossovers that help to eliminate the higher frequency noise before it is summed together with the other signals. This helps to ensure that the resulting full range signal is clean and noise free.
Last edited by benzdude; 07-28-2018 at 04:22 PM.
#85
Senior Member
#87
Has anyone tried using the Audio 20 Harness that different Amplifier MFGs offer and connect an amplifier with MOST / Fiber Optic input? Also does anyone have the Burmester connector part number either on the cable or the amplifier? Please let me know.
Thanks
Greg
Thanks
Greg
#89
Junior Member
let me know what you end up doing. My foam stuffed between the top and trunk ceiling didn’t really last. The foam has a memory compression and the holding power is kind of weak. The downside is that the subs fall over after about a day or two.
#92
Would anyone be interested in a box that would plug into the OEM harness at the AMP location that would split out all of the connectors and allow you to plug in your own Amp without cutting wires? I have found the connectors to do this. Let me know,
Greg
Greg
#95
MBWorld Fanatic!
Join Date: Nov 2003
Location: Earth
Posts: 2,233
Received 451 Likes
on
347 Posts
2015 C300 4Matic Sport
I need some help, my outputs are not even. Is this a problem? Can I see your Fix 82 screen shots. Also, I have sub channels on 7/8. I keep getting calibrate errors if I use 5/6. Front left RMS level is 1.13v and front right is 1.48v. Could it be the left wiring? I thought the Fix 82 would balance things out.
Last edited by benzdude; 08-19-2018 at 11:10 PM.
#99
MBWorld Fanatic!
Join Date: Nov 2003
Location: Earth
Posts: 2,233
Received 451 Likes
on
347 Posts
2015 C300 4Matic Sport
I need some help, my outputs are not even. Is this a problem? Can I see your Fix 82 screen shots. Also, I have sub channels on 7/8. I keep getting calibrate errors if I use 5/6. Front left RMS level is 1.13v and front right is 1.48v. Could it be the left wiring? I thought the Fix 82 would balance things out.
Now I have two last issues:
1. The AP8.9 turns on fine, but has an delay of a few seconds before audio starts (mute delay?). The OEM amp starts playing immediately and then 7 seconds later the AP8.9 has sound. (this is annoying and I not sure how to fix)
2. My JL Audio ACP208LG-W3v3 subwoofer only accepts 70mv to 1.40v max (on low level), however at 3/4 volume (playing 50hz sine wave), the voltage of the Audison AP8.9 sub preout is 2.40v. Do I simply turn down the channel 9 output in the Audison software settings until its below 1.40v?