Sent this to illidian, as he recently purchased awalkabout head from me (had my scout for sale, head and cab sold seperately; still have my racked head!)
Thought these might do somebody some good; skip it if they bore you...snip:
They're beautiful heads.
Really versatile...run input low and master high, and it's very clean; big, fat and tubey.
Reverse that, and run input varying degrees of higher, and master lower, and the tone gets more and more saturated til it starts breaking up.
Even with double bass, I typically run input at noon or one oclock, and master at 3-4.
Much of the headroom in the walkabout is in the input gain stage: don't be afraid to run it at 2-3 clock. Depending on the bass, that should be on the edge of the tubes beginning to get gritty.
With the Walkabout (and the M6 as well) using the active input not only cuts the gain too much (I think) but also takes a lot of the highs and color out of the tone. I never used it, even with my hottest basses.
One other walkabout note:
if it ever starts "acting weird," the first thing to do is clean the effects send and return jacks. Simply putting a cable into them once and a while will help. It's a known foible of the walkabout that those 1/4" jacks can oxidise, get dirty, and make it seem like the whole unit is failing on you. You can patch across them to fix it on the job...
My new in the bag/but old stock walkabout did this right out of the box...
cheers;
alan