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Old 08-20-2004, 03:11 AM   #1 (permalink)
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I have a 2004 325i without HK premium sound upgrade - I guess it comes with 10 speakers without subwoofers.
What would be the simplest way to add subwoofers?
I'm not picky about SQ but enjoy much deep bass sound.

Can subwoofers (either powered or not) be added to the stock amp?
If not, should I add an crossover?
How about replacing the stock amp with multichannel amp that support sub output?

Many thanks,
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Old 08-20-2004, 11:00 AM   #2 (permalink)
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No you can't add any more speakers to your current amp. You would need to add another amp to power your sub(s). Replacing your existing amp isn't necessary either.

The EASIEST way to add some low end to your ride would be to buy an Infinity Basslink. The sub and amp are built into one unit and installation is very easy.

If you want more bang for the buck, get a decent amp and a single 12" sub in a sealed box. My recomendation would be a Kicker CompVR 12" with an AlpineV12 or Kicker ZR series monoblock Class D amp.

If your not terribly familiar with +12volt audio, I would have a professional install it. It's not rocket science, but with pro install, you know it's done properly, and you get a lifetime warranty and someone to yell at and have fix for free if something happpens.
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Old 08-20-2004, 01:08 PM   #3 (permalink)
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Thanks, man.

BTW, where is the mono amp for sub to be connected? To the in-dash HU or to the stock amp?
How is 2 rather small subs compared to 1 large sub? As my trunk is usually full, I rather go for mountable 2 small subs than one large boom box.

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Old 08-20-2004, 01:31 PM   #4 (permalink)
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Frequency response is directly proportional to the diameter of the sub. The bigger the sub the lower the frequency achievable. So one big sub would be able to reproduce lower frequencies (deep bass) at a much higher amplitude compared to two small ones. Also keep in mind regardless of size, every sub needs a specific sized enclosure. So two subs (regardless of diameter) may well take up more room in your trunk than one larger sub.

On a side note, quality is also proportional to sound quality. In other words, i have one REALLY GOOD 8" sub that is capable of very low frequencies and very high output. It takes up very little trunk space and is plenty loud for me. The down side is, they aren't cheap and require a larger amp than would a cheaper sub. You should find a pic {HERE}
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Old 08-20-2004, 01:56 PM   #5 (permalink)
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I see. Thanks again.
I then rather go for one large sub.

What do you think about Bazooka Tube like BTA10100 (http://www.cardomain.com/item/BAZBTA10100)?
Installation seem easy as it is powered.
Can it be installed underneath the rear passengers' seat?
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Old 08-20-2004, 02:10 PM   #6 (permalink)
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Not a fan of Bazooka. We used to sell them, and never liked 'em. I seriously doubt they have one that would fit under the rear seat (I know it won't in an e36).

If you want something simple, buy the Infinity Basslink. It's more money, but you get what you pay for. BMW soundproofs the car well, so you don't want to skimp, you'll be disapointed.
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Old 08-20-2004, 03:25 PM   #7 (permalink)
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You could pay to have a custom box built / do it urself. I am going to get my E46 sound upgrade here soon, and I am putting a removable custom box right above the battery; leaving full trunk space open and still getting some 'bump'. Keep in mind, you will need a sub that can fit in small enclosoure space... I personally am going with a Kicker COmp VR 10", maybe a 12" depending on how the box turns out for space.

Whatever you do, make sure you have some decent power at your sub, the BMW trunk is sealed VERY well, and you will need lots of power to get the same sound as other cars; inside the car (less rattles and 'bumpin' outside the car ).
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Old 08-20-2004, 08:46 PM   #8 (permalink)
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Forget the Bazooka tube. Even the salesman at Circuit City said it wouldn't add much in a BMW.

I bought a Basslink on eBay and had it installed. I'm very happy with the sound. Before that I had changed my head unit to an Alpine because I wanted MP3 capability, but the sound difference from adding the Basslink was much greater than changing the head unit.
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Old 08-20-2004, 09:59 PM   #9 (permalink)
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Infitity Basslink seems great.
How the connection made between this powered sub and stock audio?
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Old 08-21-2004, 10:57 PM   #10 (permalink)
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I don't know, because I've not installed one (but I do know it's good, because I know the company well, AND know satisfied customers of the product), but I would assume the necessary connections would be as follows:

Power (accessable in the trunk)
Ground (accessable in the trunk)
remote (accessable in the trunk)
tap speker leads for signal (accessable in the trunk)

Keep in mind this is the best "simple addition" of bass, not the cheapest or most cost effective. I definately recomend it, but you can get better for a similar amount, it just requires a more labor intensive install.
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