2013 S5 B&O Speakers Ohm Rating

[Rusty Axle]

Anyone know what the ohm rating is for the factory B&O system?

I'm considering swapping out the factory speakers for some higher quality aftermarket units.

Did this once before on a Mercedes prior to installing an analog to digital converter in front of aftermarket amps, and the difference in fidelity with just the speaker swap alone was impressive.

I may be happy with just a high end speaker swap and nothing more, along with some good damping.

[Luis_Heineken]

you can remove one speaker, then measure it with a multimeter

[cspcrx]

I thought someone said they were 8ohm. There is a thread "replacing all the b&o speakers". I believe the ones he replaces, dash and doors, were all 8 ohm.

[diegom305]

same as S4. 8Ohm

[cspcrx]

Someone just confirmed for me that the dash speakers on the B&O system are 4 ohm. I am going to replace mine this weekend with VOCE av3.

[Rusty Axle]

Interesting - 4 Ohms in the dash and 8 Ohm elsewhere. I have Voce units for the front dash as well, so that sounds like a safe swap at least. Now to understand what to do with the Audisons re replacing the 8 Ohm door speakers.

I started another thread and then noticed the responses to this one. Typically get an email alert but didn't get any on this one so figured it went unnoticed.

Thanks for your responses.

[cspcrx]

I have not installed them yet. I picked up some 1ohm and 2 ohm resistors just in case. Another member had them installed and they used 2ohm resistors to help them match the other speakers.

[Rusty Axle]

If needed, the resistors would be placed downstream from the speaker in order to avoid impacting fidelity?

[cspcrx]

Put it on the positive lead. Basically it lowers the power getting to the speaker to make it less bright.

[Rusty Axle]

Thanks.

Putting a resistor on the positive terminal would mean that the signal passes through the resistor before the speaker. Aside from bleeding off some of the voltage, will a resistor modify the signal in any way, and possibly impact fidelity?

I plan to replace all factory speakers with Audison speakers. I'm thinking that the speakers would be "matched", and therefore the concern about speakers being bright could be managed by the factory controls?

Thanks again for your response, I enjoy being a do it yourself type and this is an area where I am lacking in understanding.

In a previous car, I wanted to keep the factory appearance and controls, so wired in a Fosgate signal processor in front of a couple Infinity reference Series amps driving Infinity reference Series speakers, including a single 12" sub in sealed cabinet. And also covered the entire floor pan, inside door panels, trunk and inner rear fender panels with Dynamat. The car was much quieter, and the sound from the stock system was quite good after being tuned with the Fosgate.

The S5 however has a lot more speakers to deal with so looking for a phased approach, possibly speakers only then followed up by more extensive work if the speaker only upgrade doesn't get the job done.