Mike Rivers wrote:

I just got a pile of Onyxen in for evaluation. Anything I should
look for?

You don't have to look very far to notice the new EQ (and proper bypass switch.) Main reason I opted for the 1620 rather than the 1220 was its additional (sweepable) mid.



The first thing I tried intuitively, plugging a generator into
the 1/4" jack on Channel 1, assuming it was a line input like all the
other channels. It didn't work.

I knew that a high impedance input was available with a swith on
Channels 1 and 2 - what I didn't realize until I looked at the block
diagram was that the switch doesn't convert the jack from a medium
impedance lowish gain input to a high impedance medium gain input, it
switches the channel input between the XLR connector and the 1/4"
jack. So if you want to use line inputs on Channels 1 and 2, you have
to select them for "guitar" input. It seems to have the same gain as
the line inputs, but it doesn't seem to be balanced like the other
1/4" inputs, so it isn't an exact replacement.

Right, it's a DI.

Plenty of line inputs on the other channels, particularly on the 2-bus models.