sound system upgrade - Volvo V40 Forums
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post #1 of 15 (permalink) Old 30-06-2015, 02:45 PM Thread Starter
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sound system upgrade

I would like to know if I can upgrade my high performance sound to Premium sound by Harman Kardon I have the 7 inch screen and sensus Nav systemso it shouldnt be too much of an issue right?
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post #2 of 15 (permalink) Old 30-06-2015, 11:31 PM
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Major issue.

The HK has a massive speaker that sits in the top of the dashboard for starters.


Previous - S60 SE 2004 D5 (Owned 2010-2015) RIP
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post #3 of 15 (permalink) Old 01-07-2015, 12:23 AM
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I'm contemplating a sound system upgrade as well. I wonder if just a driver change will affect an improvement, or if it's the amp/driver that would be required. I'm also looking at the boot seeing a great spot for a false floor and slimline sub. I'll probably start with the sub and see what it sounds like.
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post #4 of 15 (permalink) Old 01-07-2015, 09:18 AM Thread Starter
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does that mean a dash board change or is it factory fitted? which means it cant be added afterwards

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post #5 of 15 (permalink) Old 01-07-2015, 01:20 PM
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Volvo dealers don't seem to be very helpful when it comes to stuff like this. The ones I've asked just shrug their shoulders.

I would have thought that the centre channel would be a biggy and not worth the effort (of probably a new dash), but surely they should offer an upgrade kit comprising the drivers, amp modules, then the ability to re-flash the a/v system.

Does anyone know if the stock system has some pre-outs to use for a sub amp? And is the stock amp behind the nav system, or under one of the seats?
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post #6 of 15 (permalink) Old 02-07-2015, 05:46 PM Thread Starter
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yeah its a pain in the arse when you don't get the customer service I'm willing to pay if it can be done as I want the same quality of sound in my car as I have at home
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post #7 of 15 (permalink) Old 03-07-2015, 02:57 PM
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Originally Posted by Spruce Moose View Post
Volvo dealers don't seem to be very helpful when it comes to stuff like this. The ones I've asked just shrug their shoulders.

I would have thought that the centre channel would be a biggy and not worth the effort (of probably a new dash), but surely they should offer an upgrade kit comprising the drivers, amp modules, then the ability to re-flash the a/v system.

Does anyone know if the stock system has some pre-outs to use for a sub amp? And is the stock amp behind the nav system, or under one of the seats?
I've managed to get hold of the wiring diagram and the 2 audio systems (Performance and Premium) are very different beasts.

The Performance Audio system has the amplifier built into the Integrated Audio Module (IAM) in the centre console (it has the CD drive in it). The IAM is controlled by the Infotainment Control Module (ICM). The ICM accepts inputs from the controls via CANBus, and then talks to the IAM via the MOST bus over an optical link. As far as I can see, there are no analogue low-level outputs on the IAM, only the speaker outputs.

The Premium (HK) system uses a different IAM and a separate amplifier, the Audio Module (AUD), located under one of the front seats. This drives all the speakers including the centre dash speaker. The IAM transmits the selected audio feed to the AUD module digitally over the MOST bus, and there is no low-level analogue ouput from the AUD module either. There is also a massive amount of extra wiring (e.g. it has 3 antenna inputs compared to the 1 for the Performance system) and extra MOST optical fibre links involved, which is probably only practical to fit at the factory before the interior has been fitted.
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post #8 of 15 (permalink) Old 03-07-2015, 03:17 PM
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Love your work mate, appreciate the info.
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post #9 of 15 (permalink) Old 04-07-2015, 01:04 PM
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So on the stock system, this is under the passenger seat. Would this just be the amplifier module, or something else? Ie can I safely ditch this to put my aftermarket amp under the seat? Would be a more convenient location than the boot...
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post #10 of 15 (permalink) Old 04-07-2015, 04:31 PM
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So on the stock system, this is under the passenger seat. Would this just be the amplifier module, or something else? Ie can I safely ditch this to put my aftermarket amp under the seat? Would be a more convenient location than the boot...
That is the AUD module. It's not just an amplifier, it does the digital to analogue conversion as well. The connectors from right to left are:
1) Power
2) Primary MOST bus (optic fibre)
3) Speaker outputs
4) Secondary MOST bus (unused)

You can't remove it as the IAM only outputs a digital stream which the AUD then converts to an analogue signal and amplifies. The traffic on the MOST bus is packet-based (like ethernet) and as well as sending the packetised audio the IAM also controls the AUD output via control packets over the MOST datalink (i.e. the volume, balance etc).

If you want to fit a sub, you are going to have to tap in to one of the outputs in the third connector and do high-to-low level conversion to a separate amp (or have a sub amp that accepts high-level inputs).

It's a 16-way connector and the pins for the speaker connections are assigned as follows:
1(Grey/Black) & 9(Green/Black) - Left Front
2(Grey) & 10(Green) - Centre Front
3(Yellow/Black) & 11(Violet/Black) - Right Front
4(Grey/Red) & 12(Green/Red) - Left Rear
5(Yellow/Red) & 13(Violet/Red) - Right Rear

I would tap in to one of the front or the centre speaker connections, as if you have got dolby surround enabled I think it applies some delay processing to the rear channels.
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