Later models (A500, A2000 etc.) could disable the filter through software whereas the A1000 required a hardware hack. I can best describe it as taking the cotton out of your ears!
There was also a video hack that by clipping a resistor - the reds on the composite out were more accurate. I used to do those to just about any A1000 I came across. There should be references to both of those on the aminet archives.
If you have trouble finding them, let me know and I can try to dig up the old text files.
