The
Conn Thetrette 580 is a fun organ to play. For a spinet organ it has a
big sound and a lot of features. Mine is in the main hangerage space
and connected to two leslies and sounds magnificent. The biggest
drawback is the missing notes on the upper and top keyboard. They
tried to compensate by having an extra octave on the lowest part of
the upper two keyboards. Plugging two Leslies is easy because they
provided sockets for both 6 and 9 pin Leslies that can be used at the
same time.