Spider IV 75 I know this is an old amp but Many people still have it . and No Line 6 Support.
Please Note! This is a article found online . Does anyone know anything more on this .
This is what I found Online.
I There is a HUGE BUG with the Firmware 2.0 for the Spider IV 75.
If you try to restore the "Factory Presets" using the method by powering the
amp off, then pressing and holding the "A" button, then powering the amp
again, and waiting for the screen to ask you to confirm the reset of the "Factory
Presets", then you're going to make a MESS with the IQ of your amp. It simply
doesn't work at all ... the result is a HUGE NOISE for each and every preset
and for each and every amp setting.
The only way to go is to 1st make a safeguard on your computer of your
personal preset bundle under Firmware 2.0. Then you must install the old
Firmware 1.01 (or the last Firmware under which the reset method worked
without trouble), then you can SAFELY use the reset method (power on while
pressing "A" button), and then you must install the Firmwares back to version
2.0. In the end you wind up with your amp loaded with the Factory Presets
running under Firmware 2.0, and you can finally make a safeguard of that
Factory Presets Bundle on your computer.
Either Line 6 decides to update the Spider IV Firmware (like a version 2.01) to
include a FULL FUNCTIONAL RESET PROCEDURE, or you need to go back
to the last Firmware under which the reset method was still working fine.
Ray