[dappamikey]

What is required other than the obvious (tweeters, housings) - Will I need coding - If so, how much will it cost....Also thinking about adding an amp/sub for rear - Will there be any issues...An ICE engineer I regularly use seems to think I wont need any coding as not amping interior speakers - is this true.

Mikey

[makkan00]

Originally Posted by dappamikey

What is required other than the obvious (tweeters, housings) - Will I need coding - If so, how much will it cost....Also thinking about adding an amp/sub for rear - Will there be any issues...An ICE engineer I regularly use seems to think I wont need any coding as not amping interior speakers - is this true.

Mikey

Adding tweeters does not require coding. I am selling tweeters / mids and you can find details in the classified section.

Re: amp / sub
If you like the current sound of your BMW, yes you can add amp/ sub without coding. But your installer will be adding LOC.

Coding to hi-fi HU helps if you are going for alpine kit upgrade or complete aftermarket sound system.

Some use DSP or clean sweep to get clean signals from the headunit.

So it is down to personal choice which route you want to go.

[foxy-stoat]

Adding standard tweeters to standard mids is a matter of plugging the tweeters into the mids - done.

You need to buy the front door mouldings and cut thru your rear door cards but its pretty easy I'd say.

[AlanQS]

BMW scrapped the rear tweeters in their HiFi/business sound a few years ago and I think the OP is only talking about the front tweeters. Indeed, on a standard setup, rear tweeters would not improve the sound at all.

As has been said, the tweeters plug into the mids in the front doors and you will need a new moulding (big one on the E90) and just the triangular piece for an E92. In either case, don't forget the foam filler piece as well.

Up till 2011, no coding was required for the Alpine upgrade because the Alpine amp used high level inputs (i.e. from the speaker wires and therefore amplified output from the head unit. For other amplifiers which take a low level input (unamplified) the car needs coding to tell the headunit that it is using low level outputs not speaker outputs.

[mv57]

No one so far has mentioned cross overs. Dont know if the standard twerters comes with this.

Just food for thought.

[IanS100]

Originally Posted by AlanQS

BMW scrapped the rear tweeters in their HiFi/business sound a few years ago and I think the OP is only talking about the front tweeters. Indeed, on a standard setup, rear tweeters would not improve the sound at all.

As has been said, the tweeters plug into the mids in the front doors and you will need a new moulding (big one on the E90) and just the triangular piece for an E92. In either case, don't forget the foam filler piece as well.

Up till 2011, no coding was required for the Alpine upgrade because the Alpine amp used high level inputs (i.e. from the speaker wires and therefore amplified output from the head unit. For other amplifiers which take a low level input (unamplified) the car needs coding to tell the headunit that it is using low level outputs not speaker outputs.

I thought the coding was to flatten the EQ which BMW had tweaked to compensate for the lack of tweeters

[AlanQS]

I don't think that's the case because when I got my Alpine upgrade in 2009, BMW stated that no coding was required for this. I don't know why 2011 onwards cars need coding, but when using third party amps taking normal outputs, the head unit has to be told to stop using the output amplifier as it's not needed.

[makkan00]

Originally Posted by AlanQS

I don't think that's the case because when I got my Alpine upgrade in 2009, BMW stated that no coding was required for this. I don't know why 2011 onwards cars need coding, but when using third party amps taking normal outputs, the head unit has to be told to stop using the output amplifier as it's not needed.

Alan, unfortunately all cars benefit from hi-fi coding. LCI/ Pre-LCI does not matter and sound always improve with alpine retrofit kit.

There are HUs in 2011 and onward with BT built in HU. They require coding by a different method.