Final debate on 120-700 Hyperbolic with B&C 8PE21

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Posted by IslandPink (A) on March 3, 2011 at 12:23:09

I've been working away on Hornresp doing a hyperbolic design ( T=0.5 or 0.6) for 8PE21 that will cross at approx 120Hz to a tapped horn and 700Hz to a 288-H on Azura AH425.
This horn is modelled at about 3000cm2 mouth, 81cm2 throat ( ie. about 4 inches ) and 85cm length . It looks very nice and is close to what I want . Size-wise it fits my room nicely if I built it as a rectangular 1.6:1 mouth of 70x43cm in the Bruce-Edgar style ( conical sides ) , mounted long-axis vertically . Too much wider would be a problem ...

Now, searching as many of Bruce's posts as possible, I get a good feeling about this, but I notice Bruce said somewhere that the transition from a rectangular horn to a round one would be audible at 900Hz crossover. I'm just wondering (a) if I can get away with these at 700Hz and (b) what aspect would be audible - would it be soundstage effects or colouration ?

Comments gratefully received
MJ

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Topic - Final debate on 120-700 Hyperbolic with B&C 8PE21 - IslandPink 12:23:09 03/03/11 (15)

RE: Final debate on 120-700 Hyperbolic with B&C 8PE21 - reVintage 04:48:41 03/05/11 (10)

RE: Final debate on 120-700 Hyperbolic with B&C 8PE21 - IslandPink 09:04:56 03/05/11 (9)

RE: Final debate on 120-700 Hyperbolic with B&C 8PE21 - reVintage 11:47:06 03/05/11 (8)

Input data for this : - IslandPink 12:12:03 03/05/11 (6)

RE: Input data for this : - reVintage 14:18:11 03/05/11 (5)

RE: Input data for this : - IslandPink 14:28:50 03/05/11 (4)

RE: Input data for this : - reVintage 01:03:38 03/06/11 (2)

Hmm yes .. - IslandPink 03:49:02 03/06/11 (1)

RE: Hmm yes .. - reVintage 04:41:43 03/06/11 (0)

RE: Input data for this : - reVintage 14:49:54 03/05/11 (0)

RE: Final debate on 120-700 Hyperbolic with B&C 8PE21 - IslandPink 12:03:15 03/05/11 (0)

RE: Final debate on 120-700 Hyperbolic with B&C 8PE21 - djk 14:54:22 03/03/11 (3)

RE: foam - IslandPink 02:57:21 03/05/11 (0)

RE: Final debate on 120-700 Hyperbolic with B&C 8PE21 - JoshK 06:58:10 03/04/11 (0)

RE: Final debate on 120-700 Hyperbolic with B&C 8PE21 - tubebuilder 21:16:46 03/03/11 (0)

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