Back Loaded Horn
The Design

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The backloaded horns "secret sauce"

A Backloaded Horn’s main design goal is to increase the bass efficiency of a speaker. You might have done this as a child : you folded a piece of paper into a cone shape and spoke through it, so that it sounded louder. This is a simple example of a real life horn. Other, musical instrument examples, are the tuba or the trombone. These horns are easily made for high and mid frequencies, because the horns have acceptable sizes. A back

loaded horn is designed for low frequencies - usually from 200 Hz and below. 

The backloaded horn differs from a conventional front loaded horn in several ways: 

  • It takes the wasted back wave of the speaker and routes it to a horn labyrinth which exits at the cabinet rear.

  • The horn path is curved or folded to save space.

  • The horn path is usually longer than a front loaded horn.
     

The advantages of a backloaded horn are several:

  • Double the bass from a smaller speaker - a small speaker can have the bass of a much larger speaker.

  • The back wave of the speaker is not wasted in a cabinet, or distorted as from a ported cabinet.

  • The back wave is in phase or timed so as to enhance the front wave - this makes for a more dynamic sound.

In summary

A backloaded horn produces a more dynamic sound and deeper bass in a smaller cabinet size than regular speakers due to its unique design.