• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Riviera duetto amplifier,info needed

huggygood

Member
Paid Member
2011-03-19 8:42 am
france (bretagne)
hello
I had the opportunity to buy a pair of Riviera Duetto mono blocks and I am looking for information about these devices.
they are not at home yet, they are supposed to be broken down with a ground noise which is above the sound.
I did not find anything on the net, just one flyer on hifiengine.
View attachment hfe_riviera_concerto_praludio_duetto_flyer_de.pdf
 

huggygood

Member
Paid Member
2011-03-19 8:42 am
france (bretagne)
I received my two monsters and I'm not sure what to think about them.
It looks like a quality German construction with few low-end components but I can't find an equivalent diagram based on final 845 = 6j5 / GU50 / 845.
for the moment I found the two 6j5 cooked and pumped.
they are on order, I will see for the future.