Hi guys,
Pls educate me. Does baffle step difraction affects
speakers of all sizes or will bigger speakers be less
affected ? Also with regards to zobel network if my
understanding is correct, it is implemented to compensate
for the rise in impedance of the speaker. If this is so, why
is it that the FR guys are'nt using it in their speakers ?
Thanks
Pls educate me. Does baffle step difraction affects
speakers of all sizes or will bigger speakers be less
affected ? Also with regards to zobel network if my
understanding is correct, it is implemented to compensate
for the rise in impedance of the speaker. If this is so, why
is it that the FR guys are'nt using it in their speakers ?
Thanks
The effects of the baffle impacts all speakers until you get to an infinite baffle. The only thing that changes are the frequencies that are impacted.
As for zobel on full range designs, if there is no XO then there is little need for a zobel unless you are trying to change the impedance for less impact on the amp.
When you throw a XO into the mix, the rise in impedance, if not accounted for, will change way way in which the XO operates as you move higher in frequency. The zobel can be used to give a flatter impedance which can make it easier to get a XO to work propely, especially if you aren't using a XO optimizer. With modern software, the need for a zoble is lessened.
Regards,
Dennis
As for zobel on full range designs, if there is no XO then there is little need for a zobel unless you are trying to change the impedance for less impact on the amp.
When you throw a XO into the mix, the rise in impedance, if not accounted for, will change way way in which the XO operates as you move higher in frequency. The zobel can be used to give a flatter impedance which can make it easier to get a XO to work propely, especially if you aren't using a XO optimizer. With modern software, the need for a zoble is lessened.
Regards,
Dennis
JC951t said:
You can use a second woofer exclusively as baffle step compensation. "2.5 way" designs use this.
You can do a bipole speaker, which inherently compensates for bafflestep
You can hornload everything, which changes the nature of radiation. Big long midbass horns can push the transition down to bass range and out of the 'traditional' baffle step region.
Curves and bevels smooth the transition but it still takes place, just in a more controllable fashion.
Baffle Step starter
http://t-linespeakers.org/tech/bafflestep/intro-bds.html
Sometimes a zobel can be useful on a FR, all depends on the amplifier used with.
Many of us use amps with high output impedance. They tend to put out more power is delivered as the impedance rises -- if you look at a typical FRs impedance curve you can see that this is at the very bottom & very top -- exactly where many FRs need help. Adding a zobel in this case would defeat the synergy of the amp/speaker combination.
dave
http://t-linespeakers.org/tech/bafflestep/intro-bds.html
Sometimes a zobel can be useful on a FR, all depends on the amplifier used with.
Many of us use amps with high output impedance. They tend to put out more power is delivered as the impedance rises -- if you look at a typical FRs impedance curve you can see that this is at the very bottom & very top -- exactly where many FRs need help. Adding a zobel in this case would defeat the synergy of the amp/speaker combination.
dave
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