GLK-Class (X204) Produced 2008-2014

Best front door for speakers for non HK in 2022

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Old Jun 12, 2022 | 09:51 PM
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Best front door for speakers for non HK in 2022

I've been reading the old threads and people been raving about Infinity Kappa, so naturally I looked up the latest model which came out as Infinity Kappa 603CF.
Are these really the best? The description says they work well with an existing head unit without the need for an amp, being 3 ohm.
I already have an amp and sub at the back, just wanted to upgrade the front audio.
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Old Jun 13, 2022 | 06:09 AM
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2006 Alfa Romeo Brera, 2010 GLK350, 2018 BMW 640i GT, 1997 Subaru SVX, 2012 Moto Guzzi Norge GT8V
Wow! For that price ($570 CAD) I hope they're amazing. My left front tweeter is dead but the stock speakers are quite decent.
I can't find anybody who sells speakers for the back doors.
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Old Jun 13, 2022 | 10:29 AM
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What fits in the front fits in back. I have 2 pair Hertz 165.3 an Audison bit 8.9 and a sub.

Last edited by Mmr1; Jun 13, 2022 at 10:39 AM.
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Old Jun 13, 2022 | 02:04 PM
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It's weird how Crutchfield says there's zero compatible speakers for the back doors, when they are the same size. Now some forum members say they are difficult to install, but not impossible.
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Old Jun 13, 2022 | 03:28 PM
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I hired an installer and they didn’t complain, I put the tweeters where there are holes for them at the top of the rear hatch, mine is a 13 . Ohms doesn’t determine how efficient they are, I think that is DB per watt at 3ft. In Chicago I know a very good installer
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Old Jun 13, 2022 | 07:00 PM
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Originally Posted by Mmr1
I hired an installer and they didn’t complain, I put the tweeters where there are holes for them at the top of the rear hatch, mine is a 13 . Ohms doesn’t determine how efficient they are, I think that is DB per watt at 3ft. In Chicago I know a very good installer
Did they use included crossovers or did they install using the existing chanel separation?

Last edited by MysticMan; Jun 13, 2022 at 07:40 PM.
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Old Jun 13, 2022 | 10:04 PM
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They came with a separate crossover but I used the one in the Audison bit 8.9
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Old Jun 13, 2022 | 10:24 PM
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Ok, I'm ordering Infinity Kappa 603CF for the front and Infinity Reference REF-6532IX for rear doors, no amp. Hope for the best.
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Old Jun 14, 2022 | 04:01 AM
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Why not use the same front and back if you can , look at the back pillars on either side of the tailgate window , there should be speaker perforations and a mounting spot under the pillar
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Old Jun 14, 2022 | 05:49 AM
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Originally Posted by Mmr1
Why not use the same front and back if you can , look at the back pillars on either side of the tailgate window , there should be speaker perforations and a mounting spot under the pillar
$400 price difference is a good reason for me.
I checked again on Crutchfield and it says they have not researched speakers for the rear doors. Thanks for the info that they are the same as the front.
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Old Jun 16, 2022 | 10:09 PM
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Here they come


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Old Jun 17, 2022 | 04:05 PM
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Originally Posted by Mmr1
Why not use the same front and back if you can , look at the back pillars on either side of the tailgate window , there should be speaker perforations and a mounting spot under the pillar
Are those perforations the placeholders for HK version? Because on a base model nothing comes out of them, I thought they were for ventilation. I could see how a tweeter can be wired there from a door crossover.
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Old Jun 17, 2022 | 06:34 PM
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I switched the rear doors to Infinity Kappa 63XF, found the stock on eBay, they are made from the same material as 603CF, should match better.
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Old Jun 18, 2022 | 01:14 PM
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The question is, should the included crossover be used or does head unit already provides the correct separation for a tweeter and the woofer?
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Old Jun 18, 2022 | 05:38 PM
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Factory speakers have crossover built in, yes use your new crossover.
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