best way to run 2 8ohm cabs w/ 2000s

[THE COPS]

Hi there.  Here is some background...  I have a 2000s (used for guitar) that I have been running through a 16ohm sunn 412 (model t reissue cab - 300w).  I also have 2 412sr's.  My tech wired up the 8ohm output jack of the 2000s to be switchable between 4 & 8ohm. 

I thought I remembered reading that the 16ohm jack self switches to 8ohms - if an 8ohm cab is present out of the 8ohm jack.  Is this right?  SO theoretically I could run 1 cab out of each output, correct?

Am I missing something here?  Alternatively, I suppose I could run the cabs daisy chained out of the 4ohm tap?

thanks!

[noel]

The jacks were designed to be self switching but since your tech has made a switch for the 4 and 8 ohm jack I"d just check with him.  You have to be careful asking for advice on vintage amps when you're is not vintage (although yours is only very slightly modified).

[EdBass]

Search is your friend. This has been discussed numerous times over the years;
http://sunn.ampage.org/sdp/index.php/topic,3695.0.html
search for "output impedance".

[THE COPS]

I checked with my tech and apparently this 200s does NOT have self switching jacks.  I guess someone had done some work to it before I got it.  I just ran out from the 4ohm jack and daisy chained the 8ohm cabs together.  Worked a treat.

thanks!