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Multi-Way Conventional loudspeakers with crossovers

Infinite Line Source: analysis
Infinite Line Source: analysis
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Old 30th January 2018, 10:16 PM   #431
wesayso is offline wesayso  Netherlands
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Actually, it isn't one big reflection, but a line or array of smaller ones, all arriving at different intervals, probably easier to absorb due to that one wall reflection. No floor or ceiling to battle.
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Old 30th January 2018, 10:59 PM   #432
gedlee is offline gedlee  United States
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I understand what you are saying, I just don't think that it is significant. Floor and ceiling reflections are diminished by high DI as well.
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Old 31st January 2018, 04:28 PM   #433
BYRTT is offline BYRTT  Denmark
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Infinite Line Source: analysis
Originally Posted by samuelj View Post
At low frequencies the farfield to nearfield transition point would be closer to the line source, maybe even before reaching the listening distance. So it should be relatively easier to crossover to a point source above that.

Now if we cross a line and a point source at a frequency ( 450Hz for example) where the nearfield of the line source extends way beyond the listening distance, we should match their levels at 4m not 1m.
That way at 2.5m the point source will be 2dB hotter and at 6.5m the line source will be 2dB hotter.
This gives +- 2dB between 2.5m and 6.5m. Not bad given the situation.

Crossing a line source to a subwoofer or a supertweeter ( say above 14kHz or so) could be understood. But why would anyone cross a line to a point source at 450Hz??
To avoid another long line of midbass drivers or is it a well executed compromise for improving something else? or both?
Check out the new McIntosh xrt2.1k. They use point source for 150Hz- 450Hz and line source for bandwidth below and above that.
Thanks help then think will use one or the other and not mix them, well lets see .

Last edited by BYRTT; 31st January 2018 at 04:31 PM.
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