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Joseph Crowe

Horn No.1155 — Biradial for Mundorf 29CM1.1R

Regular price $625.00 CAD
Regular price Sale price $625.00 CAD
Sale Sold out
Quote REV01 07/07/2020: Terms adjusted to 25/25/25/25.  
Payment timeline based roughly on this schedule.  Late payment is fine as long as the job is fully paid by the end of the year.  
P1 downpayment 
P2 Due 08/07/2020
P3 Due 09/07/2020
P4 Due 10/07/2020
This is a custom product/quote for Mr. Matison

The 1155.2 horn is a special horn designed to work with the Mundorf 29CM1.1R tweeters.   The 1155.2 Horn is built to order.  
Technical Drawing click HERE.
The original blog post featuring the first project can be found HERE


  • Funds in CAD Currency 
  • Price is for QTY 3 horns (LRC)
  • Solid Walnut Hardwood (Pictures are shown in mahogany)
  • Plastic throat adapter to ensure smooth horn flare transition 
  • 1.2kHz Fc 
  • Precision CNC machined and stained  
  • Lead time 5 weeks
  • Support stand and rear foam (optional) 


  • Support Stand (can be quoted)
  • Rear Foam (can be quoted) 

Acoustical Measurements 

The below measurement is a comparison between the 1155 Horn (Green) and the driver mounted to a regular speaker baffle (Red).  

Off-Axis Performance 

The 1155 horn drastically improves the off-axis performance providing much wider coverage in the upper treble and also controlling the coverage in the midrange so that it matches the power response into the room.  This drastically improves the natural sound of instruments giving them better musical timbrel accuracy.  Edge diffraction is completely eliminated with the 1155 horn which improves transient detail.  

How it’s made video click here.