I know it’s only been a couple of days, but made any progress? 🤓
You've clearly done your homework Neal! Can't wait to see the install and hear your feedback.Been sitting on the fence amp dsp wise for a while. OEM integration is important with BMW idrive to me and the BMW M3 run a smaller capicity lithium battery led me to consider power efficiency. Rather than go multi amp and traditional a/b on components as per last build decided to look for class D and . So been looking through 1 box solutions running class d with dsp . Also getting digital audio out of the BMW idrive system was important to me rather than processing and amplifying the analog outputs.
I initially did that on my last BMW system and got average results.
BMW until recently have been using MOST digital infotainment bus which is fibre optic based. MOST is a ring topology with a series of nodes with different functions. I’m order to get digital audio out of MOST you need a device that represents a amplifier to the system.
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BMW implemented MOST 25 with the 25 being the speed of 25 mbits a second ( similar to the bit rate on a Netflix 4K video with multi channel sound ) The audio outputs of the various devices is known as Sinks,Some are in mono and others such as parking distance is in surround. The amplifier recognises these sinks and maps them to the appropriate channel.
There aren’t many car stereo manufacturers that have engineered solutions for Most and those that do only map everything to two channel audio with the exception of Mobridge. They have three groups of products. First is a basic Most to toslink device, second group is MOST to DSP and the third is a MOST / DSP / AMP.
With the amp it’s a 10 channel DSP and a 9 channel amplifier. It has 3 levels of outputs ( peak ratings into 4 ohms so guessing half for RMS )
6x150 for running components
2x300 for running mid bass/ woofers
1x500 into 4 ohms or 800 into 2ohms.
1 rca out for bigger subwoofer amp although I understand it ca
This number of channels is perfect for my install and power is at good levels for my system.
The other feature is that you can map four dsp maps to the BMW idrive presets and toggle through them via the idrive. Great for changing dsp settings for passengers such as a map with different time alignment ot rear speakers turned up.
Going to do the following
Channel 1/2 Front Focal k2 tweeters
Channel 3/4 Front door Focal es100k
Channel 5/6 Rear door K2s / es100k running passive
Channel 7/8 BMW Harmon Kardon 8 inch underseat woofers
Channel 9 Boston Acoustics SPG555 & Passive radiator ( yes it’s old and I must be one of the few still running these)
So I’ve ordered a Mobridge Most25 8.1.1 Amplifier and @mobridge has been kind enough to hook me up and is sending one to New Zealand for my install.