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Multi-Way Conventional loudspeakers with crossovers

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Old 10th December 2012, 01:19 PM   #851
dewardh is offline dewardh  United States
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Quote:
Originally Posted by planet10 View Post
As you play music the drivers change in a dynamic manner, a series XO can compensate for those changes.
This is a possible (theoretical) advantage of series over parallel passive crossover topologies, but with active the amplifier does the same thing even better . . . it "washes out" the effect of the dynamic changes in driver behavior. I'm not convinced that it makes a whole lot of difference, but the immunity from driver effects, dynamic and otherwise, that the intervening amplifier provides is one of the arguments for an active design.
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Old 10th December 2012, 03:52 PM   #852
ORNJ is offline ORNJ  United States
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I am sure that this has been mentioned before on here but I feel that Linkwitz's explanation of why active is better makes perfect sense..

The amplifier has more control over the driver and you can implement different types of crossovers for the best possible sound.

That said, I also feel like having to have 2,3, or even 4 channels of amplification for each speaker gets to be a little bit ridiculous and sends the power bill through the roof.
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Old 10th December 2012, 04:57 PM   #853
dewardh is offline dewardh  United States
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That said, I also feel like having to have 2,3, or even 4 channels of amplification for each speaker gets to be a little bit ridiculous and sends the power bill through the roof.
Not an issue if you use appropriately sized amplifiers. Four 60 Watt amps (on the same power supply) don't draw any more idle current that a single 500 (which is what it takes to match their performance).
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Old 10th December 2012, 05:34 PM   #854
ORNJ is offline ORNJ  United States
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Wow, I knew you needed more power for passive XO but I didnt know it was that much more.
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Old 10th December 2012, 05:54 PM   #855
dewardh is offline dewardh  United States
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It's just double (3dB) . . . which is pretty much enough to account for crest factor and (passive) crossover losses (in a reasonably designed system). Some people will argue that the passive systems needs even more power, but I think that perhaps they exaggerate . . .
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Old 10th December 2012, 06:12 PM   #856
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Originally Posted by planet10 View Post
As you play music the drivers change in a dynamic manner, a series XO can compensate for those changes.

dave
Any dynamic of driver that is not linearly dependent to drive signal is non-linear distortion.

How do XO components working within their linear regions correct a non-linear behavior?

Regards,

Andrew
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Old 10th December 2012, 06:28 PM   #857
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Originally Posted by Barleywater View Post
Any dynamic of driver that is not linearly dependent to drive signal is non-linear distortion.
For one, all dynamic drivers change their T/S parameters with level (and temp & barometric pressure), T/S are not scalars but curves -- no driver has completely horizontal curves

dave
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Old 10th December 2012, 06:38 PM   #858
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How do XO components in their linear range compensate for changes is T/S parameters?

Regards,

Andrew
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Old 10th December 2012, 06:47 PM   #859
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It is not the XO components, it is the way they are wired, And changing T/S are just an outward expression of the driver changing thru-out its band.

dave
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Old 10th December 2012, 07:01 PM   #860
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A parallel or series circuit of linear components has linear transfer function at every node.

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Andrew
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