its quiet sunday afternoon, wifes doing over time, baby is sleeping, so i figured i would sneak in and catch up on another build log
Many of you know that we have become quite familiar late model Bimmers...probably over 30 or so in the past few years...but interestingly, almost all of them have been 3 or 4 series...so it was quite exciting for me to book a brand new 2015 F10 series M5.
Depending on how you look at it, the simple nature of the car either goes with or against the nature of the car...which is a relatively subdued looking luxury cruising packing a tremendous wallop in the form of a 500 plus HP twin turbo v8.
1. achieve a much higher level of sound quality
2. maintain a 100 percent oem appearance in the interior
3. maintain as much stealth and space in the trunk as possible
in other words, this is kind of our most basic active sq install...nothing fancy or showy, everything geared towards sonic improvement and daily utility.
lets first take a look at this beast:
lets get started. luckily, almost all late model bmws share the same basic speaker configuration and mounting layout...so our experiences with the smaller models is almost 100 percent translated to this car. in the process of taking it apart and performing the install, i found a lot of similarities and some differences...in general, the car is slightly more of a pain to work on than the 3 and 4 series but not overly so...it would suggest to me that the F30 line of cars are on a slightly newer interior material and assembly process than the F10.
anyway...first up is upgrading the underseat woofers...and as usual, we chose to go with a set of Gladen Audio oem fitment flat woofers...whcih i feel is the best midbass option out of the ones commonly available...there are others that can go deeper and louder to be used as subwoofers, but these do a great job of providing impact and seamless integration between the true subwoofer and the midrange.
here are the horrendous bmw underseat units removed from the car:
the inside is fully deadend with STP CLD damper:
and the contact area on the back of the enclosure received a layer of ballstik foam to help with the panels buzzing against each other:
the Gladen woofers were then installed and wired up:
and then they were reinstalled into the vehicle, topped by the oem grille for a completely stock appearance:
moving onto the front stage...first, two pairs of new speaker wires were run into the door:
the midrange and tweeter are both morel, chosen for their sound quality and also oem fitment ability. the morel MT230 tweeters were nearly a direct snap in to the stock housing
the tweeter house was then snapped back into the vehicle and wired up:
i then fabricated a set of adapter rings for the morel hybrid 4" midrange and painted them black:
the morel mid was then snapped into the baffles, and it was bolted back into the vehicle:
the same process was then repeated on the passenger side:
then comes pics of the wiring bundle as it travels from the front of the car to the rear...as is our standard MO with late model bmws, all the cables were run down the driver side of the car, as far away from the stock main power cable connecting the alternator and the battery as possible. the bundle is organized and ziptied to the factory loom every few inches:
i then took off the rear deck cover, and sound proofed the rear deck with STP cld damper...i also found out that the rear vent shelf is a source of rattle, so i took that off, and laid down some simpliciflock fabric at the rear edge where it contacts the rear window glass, and also applied foam on the underside, so now the piece of fully insulated from rattling against any other hard surface:
moving onto the trunk wiring...the two cables that went up the passenger side of the trunk is the main power and ground cables, and here they are, ziptied to factory loom and the power cable lead down to the fuse holder and battery, located in the trunk well...the battery location one of the key differences between this car and the F30 series:
on the driver side, we had the oem amp and other accessory modules...when i pulled the carpet back, i realized this whole area looked like some type of crazy server farm compared to the 3/4 series, which basically had a single amplifier in there... this one had quite a few modules and even a little fan that circulated air over them...quite interesting:
i took the oem MOST optical connector off and connected it to the extension cable that came with the Mobridge MOST optical adapter piece, and ran it up to the oem loom:
and there, it terminates at the mobridge module. now this may look like your standard DA2 MOST to analog preamp, but it is actually the new Mobridge DA3 piece with its on built in DSP, able to do a fully active 3 way system and sub. This is my first time using the piece and i will do a brief review of it at the end
from there, the cable runs up to the underside of the rear deck for the amps: