Hi. To amplify on Triode's details on his upgrade. A most informative and comprehensive walk thru each step of the upgrade is available to peruse at 6 moons. This should assist in determining if you want to perform this job yourself. Avantgarde Duo Upgrade Article/Pictures.
Experience with the new Avantgarde Duo Omega
I currently own a pair of Duos that I am very pleased with. However, there is a new Duo Omega version available (a kit can be retrofitted to the non-Omega version). Does anyone have experience or observations with the new Omega version? The upgrade kit can be user installed and is not inexpensive. Thank you for your thoughts.