How to: Change Brera Rear Speakers

5605 Views 5 Replies 3 Participants Last post by AlfaCub, Aug 20, 2011

misterchase

Discussion Starter · Aug 13, 2011 (Edited)

Changed my rear speakers today for some Infinity Kappa 8cms. Thought I would take some pics for the benefit of others.

First partially remove the door seal

then remove airbag badge to expose allen head bolt, and unscrew it

Then pop off B pillar cover exposing top trim screw and unscrew that. You can now pop off the leading edge of the trim, I stuffed some rolled up cloth in between the panel and the car to give me some access.

The speaker is held into its carrier with 2 crews, but its easier to remove the whole carrier (4 10mm bolts) a ratchet ring spanner is essential for that. Disconnect wiring plug (pinch lugs on back) and then withdraw carrier.

There is enough slack in the wiring once you unclip it to allow you to cut the plug off and crimping on other connectors as required.

The speakers i fitted didn't quite fit in the carrier so some fettling was required, I enlarged the 4 holes in the carrier as well to 9mm to allow adjustment. Its worth taking the grills off the trim panel to check for fouling. The grills have retaining clips on the back.

First side took 3 hours, second side took 45 mins once I knew what I was doing.

Cheers
MC

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misterchase

Discussion Starter · #3 · Aug 16, 2011

AwB said:
Excellent post! The real question is do they sound any good? (are you driving from the headunit or an amp?)

I've disconnected the stock rears as they sound pants, muddy the mid-range and throw off the "staging" (which isn't ideal in my setup anyway). I imagine the difference is night and day for the highs, but I don't expect you'll get many lows with a woofer cone that small.

Curious also where you found the 8cm drivers - have searched but haven't come up with much in that size.

I'm driving them from an Alpine W407BT Headunit. 4 x 50w is plenty

I've set the HPF on the rear channel to 80hz as the JL 16cm in the front give plenty of bass, the sound is so much clearer now. I ran one original and one kappa at the back and and flicked balance left to right and the difference was stark. Only problem now is the dash tweeters are struggling a bit. Once those are sorted I'm done, I don't think Ill need a sub, the JLs get the wing mirrors vibrating nicely :lol:

I was lucky with the 8cms, just did a search on ebay and they came up, got em for £35, not bad for infinity Kappas!

Cheers
MC

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misterchase

Discussion Starter · #5 · Aug 19, 2011

AlfaCub said:
Am in the process of changing speakers out in both the Brera and Spider. How deep were the Kappas you fitted in the rear? Simaudio in Poole did the front ones but say there is precious little depth for the back ones!!

Hi Specs are:
INFINITY KAPPA 32.3CF CAR SPEAKERS
3.5" / 8CM 2-WAY CO-AXIAL
40MM DEEP
80MM CUTOUT REQUIRED FOR MOUNTING
35W RMS
105W PEAK
90DB SENSITIVITY
85HZ-21KHZ FREQUENCY RESPONSE
4 OHM

Cheers
MC

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