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synergy141 12-07-2009 09:04 PM

Rear Harmon/Kardon speakers are blown , what are good speakers I replace Them with?
My two rear h/k speakers are blown in my 98 m3. Im looking for new speakers that are as good or better than the stocks. What do you guys recomend?

PS . I have an Alpine CDA-9884 Deck and an Alpine M500 amp with
12" Alpine Type S sub.

bigfeller 12-08-2009 03:22 PM

Are you running the rear speakers off of your Alpine deck directly, or will you be using the BMW amp?

synergy141 12-08-2009 05:05 PM

Ill have them hooked up to the factory bmw amp.

bigfeller 12-08-2009 05:22 PM

The H/K 6x9s are 2 ohms, if memory serves, which is what the BMW H/K amp is expecting to see. Your typical aftermarket car speakers are 4 ohms impedance.

If you hook up a 4 ohm speaker to your H/K amp, with the doubled impedance, your speaker will only see about 12-15 watts of clean (less than 5% THD) power from the amp, so it really doesn't matter what you pop back there- they will be running at well below their power capacity.

As for audio quality, these are rear fill speakers, and the amp has a built-in cross-over which will send the woofers ONLY mid/ low frequencies. You need therefore be concerned with only three things; efficiency (how loud they go for a given amount of input), size (you need a 6x9), and cost (as little as possible).

synergy141 12-08-2009 06:40 PM

What do you think of the Alpine Type R 6x9's? , do they have better sound quality than the factory H/K's ? .

bigfeller 12-09-2009 11:59 AM

Type R
The Type Rs will be just fine. As I mentioned, if you're running them off of the stock H/K amp, anything will do. As for sound quality, they will sound better than your stock H/Ks, though they will probably be a bit quieter (due to their higher impedance). If the price is right, go for it- they'll provide nice fill to bridge the gap between your fronts and sub.

tominizer 03-30-2010 07:27 AM

IF you run a 6x9 that's more efficient then the factory, even though it has a higher impedance, should not notice much of a difference. Why don't you get yourself into a 4 channel amp and give the whole system a boost ?!!?!?

nachos23 03-30-2010 09:21 AM

The best for your BMW.... Bavarian Soundwerks

iverson03tj 05-22-2010 06:20 PM


Originally Posted by nachos23 (Post 1405105)
The best for your BMW.... Bavarian Soundwerks

isnt bsw only good if you dont want to by-pass the crossover and/or amp?

never knew setting up a good sound system could be so hard*mumble*

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