Are these Daan Jacobs Monos?

[user 1995]

I've been gifted a pair of what I believe might be Daan Jacobs amps.
They sound very decent doing duty on my ET LFT8Bs which require a bit of juice.

Can anyone confirm that they are DJ amps and tell me more about them? Is there a valve on the output stage, I see some glass through a little slot at the back?

 

[Scrat]

 

[chrisc]

 

[GECO]

 

[user 1995]

 

[Brian Bester]

 

[Gerlach]

 

[GECO]

 

[user 1995]

 

[d0dja]

 

[user 1995]

 

[GECO]

 

[user 1995]

 

[GECO]

 

[Family_Dog]

 

[Zilch]

 

[user 1995]

 

[Zilch]

 

[GECO]

 

[GECO]