Sunn Concert Bass Silverface Ohm rating?

[hotsnake]

Just bought an early 70's Sunn Concert Bass head - the one with the silver face and twin rca distortion jack on the back - and i'm wondering what the ohm rating is on it? The store told me it was rated at 150 watts which I have confirmed at the unofficial sunn ampage, but i'm at a loss for how many ohms it is. Can't seem to find any info anywhere. My guess is that it is 4, and to be on the safe side i could run 2 8 ohm cabs out of it yet if it is a 2 ohm head like the later 70's models i'd like to run 2 4 ohm cabs. I've got 24 hours to return this for a full refund but don't want to blow it up before I have a chance to return it if need be...Help! Quick!

[Metal Matt]

Originally Posted by hotsnake

Just bought an early 70's Sunn Concert Bass head - the one with the silver face and twin rca distortion jack on the back - and i'm wondering what the ohm rating is on it? The store told me it was rated at 150 watts which I have confirmed at the unofficial sunn ampage, but i'm at a loss for how many ohms it is. Can't seem to find any info anywhere. My guess is that it is 4, and to be on the safe side i could run 2 8 ohm cabs out of it yet if it is a 2 ohm head like the later 70's models i'd like to run 2 4 ohm cabs. I've got 24 hours to return this for a full refund but don't want to blow it up before I have a chance to return it if need be...Help! Quick!

The later red and black faced Concert series amps are 200watts @ 2ohms.

The silver faced amps are 150watts @ 4ohms.