On all my other bass amps ive ever had ive always gone from my direct out, (sometimes to a direct box), then to the board, but I was reading the mesa 400+ manual online and it was talking like it used the slave output as the direct out. And also it the direct out is 600 ohm balanced output, what does that mean??
heres the manual: http://www.mesaboogie.com/manuals/Bass 400 Plus.pdf
heres the manual: http://www.mesaboogie.com/manuals/Bass 400 Plus.pdf