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lefreQue optimizes your wind instrument! Although seemingly a simple solution, this lefreQue sound bridge is a high tech product. It's unique design resulted from many years of passionate scientific research and development. lefreQue sound bridges combine an unequaled acoustic performance with a universal and easy fit. All material are carefully selected and partially hand crafted. lefreQue sound bridges enhance the sound characteristics of all wind instruments. Once you go lefreQue, you will never go back.


Please use this link to visit their website to download helpful sizing charts and manuals for your instrument!

Why lefreQue?
From a sound quality perspective, the tube of your wind instrument would ideally consist of one piece. For practical reasons however (tuning, transport, technical constraints), wind instruments - as we use them today - consist of different sections.
LefreQue is a revolutionary sound bridge that acoustically connects the sections of your wind instrument, combining the benefits of both. The result is an unequaled improvement of your sound quality: purer overtones, accurate tuning, clear response, smooth intervals, extended dynamics, surround projection.

What is a lefreQue?
The lefreQue is a sound bridge that will make all wind instruments sound better. It consists of a bridge that is built up by two metal elements that will repair the sound breaches that occur in different parts of a  wind instrument. You can put the lefreQue on your instrument using an especially developed elastic band. You do not need to change anything on the instrument itself.

Saxophone and flute player Hans Kuijt at first invented the lefreQue for the saxophone, being unsatisfied with the sound quality of even the very best instruments. He concluded that all connections between the different parts of a wind instrument have a negative influence on the sound quality and tuning. Cork is a material that absorbs sound. You can use it perfectly to fit a mouth piece airtight to the instrument but at the same time, the properties of cork are such that it obstructs proper transmission of the required sound from the mouthpiece to the instrument. It actually mutes sound. lefreQue solves these problems.

Finding that the invention worked perfectly on all types of saxophone, Hans was curious to find out what the lefreQue would do on his flutes. On the flute there are no cork connections, but the lefreQue does the job essentially in the same way. Clamped connections at the joints of all wind instruments introduce  frequency dependent resistances (sound breaches), which can be corrected by using the lefreQue sound bridge.

Size Chart:                                                                  

  • Soprano Sax 1st connection                           
  • Alto Sax 1st connection                                
  • Alto Sax 3rd and 4th connection                      
  • Flute 1st connection                        
  • Flute foot joint                                         
  • Flute crown                                                   
  • Piccolo option 1                                          
  • Clarinet 1st and 2nd connection                    
  • Clarinet 3rd and bell connection                   
  • Trumpet
  • French Horn



  • Alto Sax 1st connection
  • Alto Sax 3rd and 4th connection
  • Flute 1st connection
  • Flute foot joint
  • Flute crown
  • Trumpet
  • Tuba, Euphonium, etc
  • Trombone
  • French Horn

lefreQue Dutch Original Sound Solution Sound Bridge

$44.95 Regular Price
$31.47Sale Price
  • lefreQue Dutch Original Sound Bridges are held onto the instrument via an elastic band, sold separately. You can find the bands and sizes here.

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