[cellsafemode]

Are you still taking your audio input from the bose amp output or did you splurge for a MOST-to-non-proprietary digital signal and remove the bose amp entirely?

[MPScan]

Originally Posted by cellsafemode

Are you still taking your audio input from the bose amp output or did you splurge for a MOST-to-non-proprietary digital signal and remove the bose amp entirely?

Everything was done post-Bose amp. That's what the Mosconi DSP was supposed to do is clean and separate that signal. Probably why ANC was a problem.

It does sound awesome. But I can't help but think that the entire stock headunit and Bose system/amp is preventing it from getting to that next level. Unfortunately, there are basically zero options for replacing the head unit and I have no idea what the MOST-to-signal pros vs. cons are.

I'm all ears to someone who's tried that option.

[classicrockr]

Originally Posted by MPScan

Finished install pics. The footwell enclosure was carpet matched as close as possible and the Fifty lights up in RED at night. It doesn't take up too much room at all really. Second is everything in the trunk, next to the stock amp and electronics which were kept. The Mosconi DSP (small silver box, lower right) takes everything from the Bose system after the factory amp, cleans it all up nicely, and outputs clean signals to the JL HD 900/5 amp.

Notice the paint isn't in that area on the car. mine's the same way - are ALL the Camaros missing paint in this area?

[ctrlz]

Originally Posted by MPScan

BTW - If you guys want to see video, the shop who did all the work put video of the install on their Instagram. It includes close-ups of each piece of it. You can view it here:

https://www.instagram.com/p/BO7_rggA_vB/?taken-by=avibostonhl=en

Very nice, indeed!
Is the back-lighting of your "Fifty" logo always red, or is it synchronized to the interior color?

[MANNAXMAN]

Originally Posted by MPScan

Looks great. Just curious how the footwell sub enclosure is secured to the car? Is it easily removable if you had to access something behind it?

[CaliMBF]

Wow, that set up looks great. I've got a couple questions. Why did your shop suggest keeping the Bose amp? My shop suggested removing the Bose amp and putting in a JL Audio Fix86 between the stock head unit and the new amp to give us a flat signal. I understand that's what your DSP is essentially accomplishing, but wondering why the Bose amp was kept in the equation. Second, the footwell sub enclosure looks amazing, I'm wondering if you are getting any rattles from the bass? I noticed you Dynamated the doors, did they apply Dynamat in the footwell area as well? What was used for sound deadening?

[ctrlz]

Originally Posted by CaliMBF

Wow, that set up looks great. I've got a couple questions. Why did your shop suggest keeping the Bose amp? My shop suggested removing the Bose amp and putting in a JL Audio Fix86 between the stock head unit and the new amp to give us a flat signal.

The head unit is sending MOST-encoded audio to the Bose amp. The speaker outputs from the Bose amp are fed into a signal processor to get a properly equalized (or de-equalized, depending on how you see it) line level signal for an aftermarket amp.

If your shop has some way to get a line level signal from the head unit, please let us know. There are some MOST decoders out there, but no one has found one that works for our car (yet).

[MPScan]

Couple answers to some of the questions above:

1. The FIFTY logo is only backlit in red. I have an Escort 9500 radar detector mounted under the rearview mirror that has a red display, and wound up keeping the internal LEDs on red, so I am simply going with a single color theme.

2. Sub is mounted to car with some sort of holding concrete clay. I can still smell it a little in the interior. It's definitely solid with no rattles at all. Scroll back in this thread -- I think I posted a pic before the carpet was put on and you can see the clay on the left and right sides of the sub.

3. I didn't ask why they chose a post-amp signal. Probably to keep all the factory functionality, I would guess. That's what they said they were doing and I didn't know a pre-Bose option was available. Per the last post above, apparently it isn't? (yet?).

[SomeGeoffGuy]

Originally Posted by ctrlz

If your shop has some way to get a line level signal from the head unit, please let us know. There are some MOST decoders out there, but no one has found one that works for our car (yet).

I was thinking the same thing. It would be nice to grab a bass output before it went into the Bose amp and had ANC added onto it. Plus, maybe you could remove some base from the factory speakers and the whole system would sound better with the addition of the sub.

-Geoff

[2006Moy]

My 1ss is the same way I had to keep the factory amp. IF we ever get some new head units available maybe we can ditch the factory amps.

[cellsafemode]

What is needed is someone to test something like this

http://car-solutions.com/en/car-most...-bos-mi009.php

There is an HMI multiplexer device that is known to work with 5th gen camaros and it does have audio-out RCA connectors, but it's unclear if it works wtih the 6th gen and unclear if those connectors capture all audio heading towards the bose amp or only a subset.

[ctrlz]

Originally Posted by cellsafemode

What is needed is someone to test something like this...

I don't know enough about MOST encoding, and every time I google the topic I fall on my face because "most" is both an ambiguous and common word!
I am not sure if there is a standard way audio is inserted into the data stream. A whole frickin' internet out there with tons of coding guidelines... yet MOST is like hieroglyphs before the Rosetta stone.

I hope our implementation of MOST is shared across multiple GM products which should create enough of an opportunity for someone to manufacture a decoder for aftermarket audio.

[CaliMBF]

I wrote JL customer service directly to get a straight answer on the FIX86 and its placement in the system. Their reply is below. You were absolutely right ctrlz. I guess that's why I haven't pulled the trigger on my upgrade yet, b/c even the high end custom shops in my area still don't have enough knowledge on working on our cars yet. However, I will point my shop to this thread as it's by far the best when it comes to replacing a Bose vert system. Thanks again for starting this thread!

Carlos Chavez (JL Audio)
Jan 13, 15:26 EST
Hello,

Correct, you'd have to place the FiX-86 in line between the OEM amplifier and the aftermarket amplifier. Be aware you'll probably need to disable any Active Noise Cancellation in that vehicle as well.

[ctrlz]

I did some thorough searching on MOST today and had much more success than previously! I'm not sure how much it will really help, because GM's implementation of MOST is still unique to GM.

For reference, our Camaros use MOST50 over copper for communication between the audio components.

First my big find. You can download (for free) an entire book (in English) on MOST from this location:
http://www.mostcooperation.com/publications/most-book/
There is some interesting stuff on audio around page 300.

Second, to get the most specific information on this topic, it is worth searching Camaro6 for posts by gblaue. He keeps a low profile, but one can quickly infer he has a firsthand working knowledge of Bose amplifiers, but not the exact amp in our car.

I get the impression we are unlikely to see a MOST-to-lineout audio decoder unless Chevy itself decides to produce one.