Is it possible to cover the whole spectrum, high SPL, low distortion with a 2-way?

Simply put: if you want wider coverage (at least on plane) than roughly 60°, for a given throat size, horn length and shape, you'll need some sort of pinching/narrowing in the horn path in order to 'shape' the wavefront (and avoid beaming).
 
Last edited:
Some may argue, "what about this?"
A (blue) horn and no pinching to speak of.
 

Attachments

  • BlueHorn.jpg
    BlueHorn.jpg
    128 KB · Views: 347
Last edited:
The Meyer is quite nice !
The throats of the 2" BMS horns do also look like the one on the Klipsch, i.e. quite simple actually.

While it shouldn't be that difficult to calculate throats with smooth transistions I guess it is quite difficult to make a mould/template for such a throat. Maybe practical waveguides for which the models/templates are made by the stretching of foil and or fabric are not that bad either.

Regards

Charles

Regards

Charles
 
Inside RCF HF940 throat (ignore the rope)))

The HF950 is probably one of the best best horns on the market.

It's a shame RCF didn't deem it necessary to improve the quality of fit and finish.
The smaller RCF horns, cast/molded in one piece, are much better.
 

Attachments

  • HF950_Exterior.jpg
    HF950_Exterior.jpg
    67 KB · Views: 430
  • HF950_Vanes.jpg
    HF950_Vanes.jpg
    138.8 KB · Views: 430
  • HF950_Mouth.jpg
    HF950_Mouth.jpg
    106.8 KB · Views: 431
  • HF950_Split.jpg
    HF950_Split.jpg
    115 KB · Views: 432
Last edited:
For comparison, HF 94 and HF 64 (last 2 images) including throat adapters:
 

Attachments

  • RCF HF64_1.JPG
    RCF HF64_1.JPG
    341.8 KB · Views: 66
  • RCF HF64_2.JPG
    RCF HF64_2.JPG
    319.4 KB · Views: 67
  • RCF HF 94_4.jpg
    RCF HF 94_4.jpg
    24 KB · Views: 68
  • RCF HF 94_3.jpg
    RCF HF 94_3.jpg
    20.3 KB · Views: 69
  • RCF HF 94_2.jpg
    RCF HF 94_2.jpg
    106.4 KB · Views: 71
  • RCF HF 94_1.jpg
    RCF HF 94_1.jpg
    111.1 KB · Views: 409
A German guy measured a BMS 4590P mounted to an old Seeburg Acoustic Line 60x40 horn.
 

Attachments

  • Acoustic Line Seeburg HJ-236_Small.jpg
    Acoustic Line Seeburg HJ-236_Small.jpg
    112.4 KB · Views: 100
  • Acoustic Line Seeburg HJ-236_2_Small.jpg
    Acoustic Line Seeburg HJ-236_2_Small.jpg
    148.7 KB · Views: 110
  • bms4590p-hj236_fgang_6m-1024x520 (1).png
    bms4590p-hj236_fgang_6m-1024x520 (1).png
    80.3 KB · Views: 98
  • bms4590p-hj236_hor_6m (1).png
    bms4590p-hj236_hor_6m (1).png
    231.6 KB · Views: 107
Ah OK !
I quess this waveguide does still behave better than an old 2344 for instance. Or am I wrong ?
My gut feeling tells me that sharper shapes used for diffraction work better up to higher frequencies in achieving wide dispersion but smoother ones have less unwanted side effects (like uneven frequency resonse and horn honk).

Regards

Charles
 
Last edited: