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Determining factors on sub purchase

Discussion in 'Mobile Phones / Entertainment' started by brentl, Nov 3, 2003.

  1. Angelo_Petralba

    Angelo_Petralba Well-Known Member

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  2. Sean^M

    Sean^M Well-Known Member

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    an album isn't really car audio material since records don't rare well in a car [​IMG]
    computer test tones I can accept. CDs I cannot, since again, they are filtered below 20Hz, and most subwoofer amplifiers that are worth anything use a subsonic filter anyway.

    eD is an ok company, but not my personal pick, as their representatives are completely clueless. For the money, some of their products are a good value. I do however dispute their claims to beat JL's W7 line, just as I dispute the misleading similar claims of MTX and their 9500 line of drivers.

    Regarding Xmax, that's important to any design, as the excursion combined with the cone surface area determine how much air the sub is going to move.

    Power handling determines very little to be honest. Power handling is merely a measure of the driver voice coils' ability to dissipate heat. The more power you put to a sub, the more heat the coil(s) will need to handle without melting. More power doesn't always mean a louder speaker.
     
  3. brentl

    brentl Well-Known Member

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    "most subwoofer amplifiers that are worth anything use a subsonic filter anyway." Sounds a little eliteist to me[​IMG]

    See the other thread(show me your ride) about Kenwood mono amp. One of them has one, does that mean it's worth anything?

    B
     
  4. Andrew S-

    Andrew S- Well-Known Member

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  5. Scott L

    Scott L Well-Known Member

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    Yea whoever said ED is better than a W7?? Certainly not ED, I have yet to see one ad from them.

    Just fyi, an EDa comes with a 3 year warranty. A W7 is 2 year AND it has to be installed by a dealer or they "approve" your installation. (source)
     
  6. Sean^M

    Sean^M Well-Known Member

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    Saying that most if not all good amps have a subsonic filter, does not, conversely mean that any amp with a subsonic filter is a good amp.
    That was an illogical argument, and Kenwood is still crap.
    Their reliability is lousy, and has been for at least the past decade or longer.

    As for eD, the W7 comparison was from one of their reps, who I will once again point out, can't find his ass with both hands. He was completely unable to back up any of his claims regarding things like driver sensitivity or efficiency.

    The excursion of the sub will always determine how much air it can move, regardless of the enclosure type. The farther the cone travels, the more air it'll move, be it in front or behind the cone, and thus through the port or not.

    As for power handling, It's still only a singular factor in a much more complex calculation, and alone, is meaningless. I ran a pair of twelves with 160 watts RMS each and I'd hit over 150dB in every IASCA Pro event I entered using an Orion 280GX with a pair of Cerwin Vega LE-12D subs in a vented enclosure I designed. I've seen people who couldn't hit that with two twelves in a different car, box, and driver make, using nearly ten times that amount of power.
    My point is that no single spec on a speaker will automatically make it superior to another speaker.
     
  7. Sean^M

    Sean^M Well-Known Member

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    by the way regarding JL and eD, they have polar opposite views on sales as well.
    eD only sells through their website from everything I've been able to find. Not something I see in local shops.
    JL *only* sells through brick and mortar shops, and they do not authorize any online sales, much like a number of other higher end audiophile grade companies.
    I'm not saying either approach makes a company better.. just difficult to compare a warranty and a requirement for professional installation based on that difference.
    Look at car alarm companies. None of them will warranty their products if not installed by an authorized professional. Most won't even supply wiring color codes for the alarm harnesses to the end users.
     

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