The following articles are representative of the thoughts and work done by Mr. Duelund.

Files can be downloaded by right clicking on the link and choose “save as”. To view the files please use Acrobat Reader. Download Adobe Reader.

absolutfase_hear.pdf (37.0 KB)
AYLI.pdf (132.9 KB)
cab,_units_and_room.pdf (362.7 KB)
duelund-filter.pdf (173.8 KB)
elektronen.pdf (20.4 KB)
How to build to the limits of possibility. (367.1 KB)
Loudspeakers in practise (173.1 KB)
Loudspeakers, My hobby (51.1 KB)
ISO_9613.pdf (194.6 KB)
Loudspeaker_impedance_correction.pdf (16.1 KB)
snigende_gift.pdf (20.0 KB)
sound_and_brain.pdf (28.5 KB)

The unstoppable guys of have created a great little tool, which allows you to calculate target curves for the Duelund Synchronous filter.

We advise, you check it out: