« Last post by Rip Van Dan on April 22, 2017, 05:21:53 PM »
OK, it used to be that we would say that was a WT800A series which seriously could NOT go down to 4 ohm bridged and that part is still true. Then along came the WT800B and WT800C and those would go down to 2 ohms per channel and 4 ohms bridged.
HOWEVER, after Marshall bought Eden and reviewed the amps they were not comfortable with the WT800B and C being run bridged at a 4 ohm load, even though the WT800 had been running bridged at 4 ohms since sometime in 2005. Marshall bought Eden in December of 2011 and during 2012 the WT800C started showing up once again with the text "Bridged Output only - 8 ohm minimum" next to the bridged output instead of the previous "4 ohm minimum".
If your WT800C doesn't have the backlit logo and the speakon speaker outputs on the back (as opposed to the banana connectors of previous WT800's), then 800-watts at 8 ohms is the limit for running bridged. Personally, I wouldn't try pushing it to 4 ohms bridged if it doesn't have the porchlight. If it's got the porchlight, I would run it at 4 ohms bridged in a minute. Marshall didn't change the WT800C at all, just changed the text at the bridged output.
I actually checked my manuals and the WT800B, which was the first WT800 to safely run at 4 ohms bridged and 2 ohms per channel, is dated July 15, 2005. The 2005 catalog features the WT800A series, there was no catalog in 2006, and the 2007 catalog features the WT800C. So the "B" version "probably" hit the stores in late 2005 or early 2006.
Another difference you can check that ONLY the WT800C had was a "mute to tune", which disconnected all outputs except the tuner output. You would engage the mute on that by "gently pulling the Input Gain Knob out. If yours does that, then it is a WT800C. Unfortunately I don't have a date on that Addendum so I don't know exactly when it was published.