Help identifying Yorkville 400B head jacks

hall1k · #1 09-08-2010, 05:23 PM

My new (to me, anyway) Yorkville 400B head has four 1/4" jacks at the back, two of which are coloured red and are for hooking up cabs. However, there's two other jacks right above the red ones and I have no idea what they're for. The manual only talks about the front panel, it surprisingly says nothing about the back of the unit. Any ideas what the two unlabeled, uncoloured jacks are for?

Jazz Ad · #2 09-08-2010, 05:35 PM

One is a TRS effect loop insert and the other one is a balanced line out in TRS jack form.
I don't remember which is which though.

hall1k · #3 09-08-2010, 06:37 PM

Are you sure? It seems odd cause those features are already provided on the front panel.

Jazz Ad · #4 09-09-2010, 12:49 AM

Yes. They are doubled in the back because the head is rackable and these are more practical to have behind when racked.

hall1k · #5 09-09-2010, 10:42 AM

oh okay, that makes more sense. ty for your help.