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DynFan
04-15-2012, 04:04 PM
Hello! New to the board and want to introduce myself with a question that has me stumped.

I recently purchased a used Volvo S80 equipped with Dynaudio speakers/passive crossovers and powered by a class D Alpine amp/DSP fed by fiber optical digital input signals (no RCA outs). Blown away by the fundamental sound quality of the system EXCEPT that is clearly under powered and needs a sub.

I don't want to go active and don't need time alignment either and don't want to flatten the EQ curve and re-work it. Love it just the way it is. Dynaudio and Volvo engineers have done stunning work but apparently some penny pinching accountant decided the anemic class D amp is sufficient but it clearly isn't (for my taste anyway). I think my only option is taking a high level feed from the factory amp/DSP so what I am looking for is the cleanest, most unaltered signal possible to feed both a two channel Butler amp for mains, along with a sub amp. The only "processing" i need to for high pass filter to the sub. The existing speakers have passive crossovers voiced exactly the way I like them - just need more power.

I'm stumped because I can't decide between a processor such as an Audison Bit Ten which seems like a quality product but perhaps way overkill for what I need, or maybe a simple but high quality line level converter is a perfect solution? It is WAY more important to me to maintain signal integrity than to have gobs of processing power and capabilities. I am from the camp that simple, yet high quality components are preferred over complex designs with lower quality components.

So with that background and objective, is there an "ideal" solution or does every option come with compromises?

Worlddre
04-15-2012, 04:29 PM
look into the navtv tm6 most preamp integration. It is the first processor of its kind. It plugs directly into the MOST fiber optic inputs at you amplifier and gives you un altered front, rear and sub preamp outputs. In that vehicle this will likely be the best signal you will get to your aftermarket amplifiers. Its still in testing so if you gave navtv a call stating what you want they will probably give you a hell of a deal on one as they are still looking for test subjects.

DynFan
04-15-2012, 05:59 PM
Hey thanks, very interesting. I will give them a ring.

martiandancer31
04-15-2012, 11:32 PM
i wouldn't use a LOC if you want to maintain signal integrity. I'm sure you can buy amps with optical inputs, or a DAC unit with optical input and that will fit your needs much better.

DynFan
04-16-2012, 12:33 PM
MD,
Thanks but because the digital source is MOST, not toslink, there don't seem to be many/any options I can find for the specific Volvo model and year I have. Does anyone know if the fiber optical out signal from the deck has already been processed or is it a flat, 2 channel signal? Trying determine if the MOST converter by Motuslab "AGW Light" would be an option as well or do these things have to be programmed specifically for a make and model of vehicle. Thanks for any insight . . .

fasfocus00
04-16-2012, 01:09 PM
so 2 channel amp for fronts (not active) and mono for bass, i'd do an Audiocontrol LC6i into an Audiocontrol 2XS. connect the speaker level inputs from the front tweets, front mids, and the factory sub into the LC6i. LC6i main into the 2XS with the factory 90hz crossover chip. 2XS High to your 2 channel and Low to your mono.

Worlddre
04-16-2012, 07:25 PM
If navtvs tm6 couldnt help then the m0bridge DA1000 will grab the Most Signal before the factor amp like the tm6 would and give you front rear and sub out. And so you know the most signal in those vehicles in unaltered before it gets to the amplifier. All processing is done inside the amplifier so when you grab signal before the amp with one of the products i have suggested you are guaranteed an easily gotten full range signal whereas if you go after the amplifer with anyones loc you will need some sort of summing making the install a bit more of a pita. The LC6i included as if i recall it only sums for the sub channel and takes the rest as is.

groundpound4200
04-17-2012, 03:50 PM
MD,
Thanks but because the digital source is MOST, not toslink, there don't seem to be many/any options I can find for the specific Volvo model and year I have. Does anyone know if the fiber optical out signal from the deck has already been processed or is it a flat, 2 channel signal? Trying determine if the MOST converter by Motuslab "AGW Light" would be an option as well or do these things have to be programmed specifically for a make and model of vehicle. Thanks for any insight . . .

I'd put money on it being a highly EQ'ed signal coming out of that fiber optic cable. Many of the higher end OEM integration units have capabilities to defeat this preset EQ

tc300
04-17-2012, 04:15 PM
This is gona be an install for an "expert"!!!! Lol

---------- Post added at 12:15 PM ---------- Previous post was at 12:15 PM ----------


I'd put money on it being a highly EQ'ed signal coming out of that fiber optic cable. Many of the higher end OEM integration units have capabilities to defeat this preset EQ



Ya i was thinkn the same thing...

Worlddre
04-17-2012, 04:35 PM
I'd put money on it being a highly EQ'ed signal coming out of that fiber optic cable. Many of the higher end OEM integration units have capabilities to defeat this preset EQ

It's not....signal out of any MOST radio is full range 2 channel digital audio. All processing is done within the factory amplifier. Using either the M0bridge DA1000 or Navtv TM6 is the only way to grab that untouched un molested digital full range signal

DynFan
04-19-2012, 08:23 AM
I talked to NavTV and they are supposed to get back with me to confirm if compatible with my Volvo. The Mobridge number was busy for hours so gave up and will try again later. Also talked to dealer for Motuslab about their AGW Lite/Plus. Feedback their was that the MOST interface has been problematic so he steered me towards a Mosconi processor from the amp out signal. Back to where I started. I will see what NavTV has to say and keep trying a while longer with Mobridge and if no luck there I guess my default is the $440 Audison Bit Ten I guess

BassMechkanic
04-19-2012, 10:22 AM
look at the JBL MS8, but cant go wrong with the Audison piece.

Worlddre
04-19-2012, 11:51 AM
there are 14-15 mobridge dealers in denver give one of them a call they may be able to help a bit more. Sounds Good Audio is on top of that list.

DynFan
04-20-2012, 01:18 PM
Update: There is a chance I will be beta testing the Nav-TV Volvo unit, should find out Monday. The Mobridge number forwarded me to Rockford Fosgate who is their master distributor in the US. They were suprised to hear that Volvo uses the MOSTbus system and also no idea why Mobridge didnt list it as an option. I have emailed Mobridge in Austrailia to see what they say.

I'll give one of the Denver dealers a call but I'm guessing they don't know either.
Cheers

DynFan
04-28-2012, 12:19 AM
Got the first production NAV-TV Most Preamp Processor for Volvo headed my way. Sounds very promising.

Worlddre
04-28-2012, 09:47 PM
good to hear

DynFan
06-14-2012, 03:46 PM
Ok! Good news to report for those interested. The Nav-TV TM6 is an amazing little unit. It does indeed take the direct fiber optic (MOSTbus) feed which is a flat, 2 channel signal and then converts to an analog (RCA) output to Center, Front doors, Rear doors and Subwoofer.

Although it was ready to go for later model Volvo's, my 2007 with the premium Dynaudio system was a different configuration so it took a while for them to reverse engineer but I am very happy to say it is working beautifully, with an ultra pure clean signal feeding my Bulter amp. Stunning sound quality - dead quiet and ultra dynamic.

The installation is a snap. I installed under the passenger seat (unit is about the size of a couple decks of cards side by side). Just needed a battery hot and ground so I spliced into the factory amp cable for that and plugged the fiber cable in and instant preamp/processor. I ran my RCA's to the trunk to my amp and then spliced speaker wire back to the factory harness speaker wire. TM6 has a remote turn on lead for the amp as well.

The interface is impressive as well. Installed on my laptop I simply connect via USB while music is playing or off line and make changes and hear results in real time. Up to 31 band EQ, with time alignment and slope (Q) settings for each driver. You can create and save different profiles to compare one setting against others or baseline.

Great guys to work with there too. For anyone who has a fiber optic (MOSTbus) equipped car like Volvo, Audi, Porsche, etc this is the first and only option that I know of to feed a pure digital fiber optic signal to a preamp/processor and aftermarket amp instead of having to take a feed from the outputs of the factory amp. No simple task but Nav-TV pulled it off. You dont have to be an audiophile to appreciate the sound quality either. I demo'd the set up to my wife and I couldnt get her out of the car until she heard all her favorite tunes.

Anyway, in summary it took a while to get the model specific programming done but now that it is finished I can say it was definitely worth the wait and I am very happy I didnt opt for the compromise route.

any questions about the sound or installation or whatever, just let me know and I'll be happy to respond.

Cheers