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Hi,

Hmm, I suggest you think a bit harder....

First, the lower the crossover point the less critical timealignment becomes.

Secondly, with a 4th order highpass at 1.44KHz the attenuation at 720Hz will be the same as a second order highpass at 2.88KHz (but below that the higher order filter will have a lot more attenuation).

You must understand that the Orion was designed from the word go to be active, use high order filters and all such stuff. For a conventional speaker using conventional and affordable drivers it is probably close to the limits of what is doable.

Lowthers, AER etc suffer from a rather uneven frequency response which requires correction using acoustic or electric equalisation. Acoustic equalisation means usin g a horn and a front one at that (eg Beauhorn Virtuoso).

Supravox Drivers (which I'm afraid we distribute in the UK so you might discount my recommendation) are much better balanced tonally and can handle more LF than most AER's or Lowther if you get the Signature Version. In that case you don't quite get as much efficiency, but reflex and/or TQWT enclosures will at least give a evenly balanced sound, using the right drivers you can even get away with dipoles.

Efficiency is a direct result of size and frequency, that means for loud LF you must go large. The way out is to up the power to "insane level", use drivers with a large cone surface and a small box, with a suitable equalisation.

The way I do that in my current system is with two 12" long throw pro-audio drivers and around 250W power in a 15" cube.

Well, it can use some mods to get the best from it (change levels from pro-audio to something more compatible with home audio, upgrade the rather basic Op-Amp's and coupling (electrolytic) capacitors, but the basic stuff is there and even unmodified, as long as you set the levels right and when coupled with a sensible relatively cheap multichannel Amp (Panasonic aparently has something reasonably nice - the XR45) can be surprisingly better than the same money invested into a 2-Channel Amp and a passive crossover....

Ciao T

<blockquote data-quote="3DSonics" data-source="post: 626681" data-attributes="member: 1907">Hi,Hmm, I suggest you think a bit harder....First, the lower the crossover point the less critical timealignment becomes. Secondly, with a 4th order highpass at 1.44KHz the attenuation at 720Hz will be the same as a second order highpass at 2.88KHz (but below that the higher order filter will have a lot more attenuation).You must understand that the Orion was designed from the word go to be active, use high order filters and all such stuff. For a conventional speaker using conventional and affordable drivers it is probably close to the limits of what is doable.Lowthers, AER etc suffer from a rather uneven frequency response which requires correction using acoustic or electric equalisation. Acoustic equalisation means usin g a horn and a front one at that (eg Beauhorn Virtuoso).Supravox Drivers (which I'm afraid we distribute in the UK so you might discount my recommendation) are much better balanced tonally and can handle more LF than most AER's or Lowther if you get the Signature Version.&nbsp; In that case you don't quite get as much efficiency, but reflex and/or TQWT enclosures will at least give a evenly balanced sound, using the right drivers you can even get away with dipoles.Efficiency is a direct result of size and frequency, that means for loud LF you must go large. The way out is to up the power to &quot;insane level&quot;, use drivers with a large cone surface and a small box, with a suitable equalisation. The way I do that in my current system is with two 12&quot; long throw pro-audio drivers and around 250W power in a 15&quot; cube.Well, it can use some mods to get the best from it (change levels from pro-audio to something more compatible with home audio, upgrade the rather basic Op-Amp's and coupling (electrolytic) capacitors, but the basic stuff is there and even unmodified, as long as you set the levels right and when coupled with a sensible relatively cheap multichannel Amp (Panasonic aparently has something reasonably nice - the XR45) can be surprisingly better than the same money invested into a 2-Channel Amp and a passive crossover....Ciao T</blockquote>

[QUOTE="3DSonics, post: 626681, member: 1907"] Hi, Hmm, I suggest you think a bit harder.... First, the lower the crossover point the less critical timealignment becomes. Secondly, with a 4th order highpass at 1.44KHz the attenuation at 720Hz will be the same as a second order highpass at 2.88KHz (but below that the higher order filter will have a lot more attenuation). You must understand that the Orion was designed from the word go to be active, use high order filters and all such stuff. For a conventional speaker using conventional and affordable drivers it is probably close to the limits of what is doable. Lowthers, AER etc suffer from a rather uneven frequency response which requires correction using acoustic or electric equalisation. Acoustic equalisation means usin g a horn and a front one at that (eg Beauhorn Virtuoso). Supravox Drivers (which I'm afraid we distribute in the UK so you might discount my recommendation) are much better balanced tonally and can handle more LF than most AER's or Lowther if you get the Signature Version. In that case you don't quite get as much efficiency, but reflex and/or TQWT enclosures will at least give a evenly balanced sound, using the right drivers you can even get away with dipoles. Efficiency is a direct result of size and frequency, that means for loud LF you must go large. The way out is to up the power to "insane level", use drivers with a large cone surface and a small box, with a suitable equalisation. The way I do that in my current system is with two 12" long throw pro-audio drivers and around 250W power in a 15" cube. Well, it can use some mods to get the best from it (change levels from pro-audio to something more compatible with home audio, upgrade the rather basic Op-Amp's and coupling (electrolytic) capacitors, but the basic stuff is there and even unmodified, as long as you set the levels right and when coupled with a sensible relatively cheap multichannel Amp (Panasonic aparently has something reasonably nice - the XR45) can be surprisingly better than the same money invested into a 2-Channel Amp and a passive crossover.... Ciao T [/QUOTE]

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