TC Electronics BQ250 Reversed Active/Passive Switch and Over Loading The Front End Gain FIX !

[whamni]

If you have  a TC Electronics BQ250 with a reversed active/passive switch and overloading the front end. Well after a long time I finally found a cure !
First of, this doesn't fix the switch problem but it sorts out the front end gain overload.

This is the opposite to what TC will tell you to do, first turn the MASTER down then turn the GAIN up to 5 o'clock, turn your bass up, this will be loud,  you now will see the red LED come on to say it's clipping, now, turn up the MASTER till the LED goes out, that should be around 9 o'clock, BINGO it works.
So apart from the reversed switch, there is something wrong with the way it was wired inside !
Hope this helps for you, as I was about to file this amp under B for BIN.

Edited April 25, 2022 by whamni