HeavyCn
New Head-Fier
Hello,
First burn in the Cayin amplifier with the tubes and repeat the test.
This will probably be due to the bass fluttering because nothing has been recorded yet.
All the electrolytes in the capacitors have not yet received a run through with the inner foil.
And the tubes always need a certain amount of time to open completely.
Give the amplifier at least 100 hours play-in time.
That makes a lot of difference and can sometimes be a real rollercoaster ride.
If it doesn't get better after that, I would change the tubes before you complain about it.
There are sometimes defective tubes, even if they are new.
Especially with today's transport, packages are handled very roughly.
Something can lead to a defect.
I will definitely burn it in/give it some play-in time and go from there. I really appreciate your response and help!