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In Reply to: RE: Bohlender-Graebner Neos posted by Roger Gustavsson on July 20, 2015 at 07:40:29
Aah, bugger!! Now I won't be able to implement Satie's Neo8 mids! :-((
Andy
Follow Ups:
Never fear, you can apparently get a similar performance from a line array of the Dayton AMTPRO-4 8" air motion transformers - better performance and more linear FR on top at the expense of having to high pass it 1/2 to 1 octave higher up or with a steeper XO.
Thanks, Satie but the spec says " Thanks to its ability to be crossed over as low as 800 Hz ".
Q1: what HP slope do you think they are thinking of?
Q2: if it's, say, 800Hz @ 12dB ... I would have to take the bass driver up this high too match - but, given the 2.5 bass drivers which I'm using in my Frankenpans have (stock) a 2nd order LP filter @ 500Hz, this shouldn't be a problem (in terms of the ability of the driver to go up this high).
Regards,
Andy
The Neo 8 have a similar FR and single unit rec XO is 500 hz.
Assembling a line array (8 units per side - and probably ok with 6 units per side) fills out the FR below the single unit rolloff.elbw. So the proper XO for the array would be ~400 hz at low order - 1st or Bessel (low Q 2nd) A bit of additional baffle - at least on one side (think bass panel) should help with the low end FR. The thing to remember is that the lower the freq the more additive the output from the line array - since output has very little vertical components and only at lower freq do they add up as do cones or domes..
Andy, you can still get them from the German distributor. Not very cheap but they can select matching ones.
.
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