Organ Service Corporation

190 East Washington Street    P.O. Box 372,  Marengo, IN  47140

Phone: (800) 457-4408   Fax: (812) 365-2208



Conn Organ Model Information

Conn Electronic Pipes

(The following is from the Conn Guide to Better Organ Installations in Churches and Auditoriums)

Conn Electronic Pipes come in three models.  The smaller, or treble unit, is the model 145 and comes in three different types with the only difference being the configuration of the pipes on the walnut wooden base.  The 145 pipes have been designed to complement the brighter stops of the string family, the higher harmonics of the diapasons and mixtures, and when added in parallel with the Leslie, the flutes take on a sparkle that the Leslie alone us unable to provide.

The model 146 is made up of larger pipes mounted on the same size wooden base as the 145 and are capable of handling the lower octaves of the manuals.  These lower range pipes bring out the body of the diapasons and add authenticity and richness to the reeds.

The pipes are meant to be used on the manual voices only.  Although the 146 pipes will produce the tones of the pedal, string and reed stops quite well, it is necessary to have the pedal sixteen foot diapasons and flutes speak through ordinary cone speakers in order to bring out the deep bass tones which they produce.

The sound producing portion of the electronic pipes are the four, six by nine speakers located in the wooden base.  Each speaker has an impedance of eight ohms and the four of them are wired in series/parallel so the impedance of each pipe is eight ohms.  The tone is produced in a common manner, but the only way for the tone to be heard is through the pipes, each of which is permanently  tuned to resonate at a different frequency of the musical scale.  (The impedance of the model 144 is sixteen ohms.)

When the speakers are energized b a tone from the organ, the column of air in each pipe acts as a cushion on the tone and has to be put in motion before the sound can escape resulting in the volume building up gradually before the tone blossoms out the top of the pipe in all directions.  Secondly, the metal walls of the pipes, which are tuned to the frequencies being played, will begin to resonate.  Then the pipes which are tuned to the harmonics of the pipes being played will also resonate.  The result of all this resonating and pneumatic action within the pipes is a wall of sound totally lacking in the undesirable beam effect produced by ordinary cone speakers alone.  When the keys of the organ are released, the column of air within the pipes does not come to rest immediately, allowing the tone to linger for an instant before dying away completely.

Conn Electronic Pipes can be used on any Conn or Connsonata organ.  Their addition to even the oldest of Connsonatas improves the tone considerably and is well worth the expense and work involved.  When the pipes are added at the same time the organ is rebuilt, the tonal improvement is very noticeable. 


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