2. amps-preamps
  3. 1222295130

Jeff Rowland 501s burn in ... a strange experience

I have received today my monoblocs 501 and borowed a ML 39:
ML 39
NBS monitor III
Capri
NBS Monitor III
monoblocs 501
NBS Monitor IV
Infinity Renaissance 90

around 2:p.m (Europe) I have installed the system:
sound very detailed, beautifull soundstage imaging & focus, great energy,
on the negative side, some high frequencies too harsch a little bit venomous

6 hours later (system working all the time) complete change ... do the monoblocs suffer jet lag? ... ;-)

the sound has become very fat and heavy, has the energy of a sleepy hypopotamus, everything is slow, too warm, without focus, like coming from bad tube components ...

from one extreme to another... how is that possible, so extreme, I am ???

any suggestions?

thanks
clavil

Showing 2 responses by muralman1

muralman1
1,527 posts
 
My class D amp builder, Henry Ho, told me this story. A buyer of his amp called him after a first listen, and said, "Henry, your amps have NO BASS!" Henry told him to be patient. A half hour later the guy called back, "Henry, your amps have TOO MUCH BASS!"

Henry now tells buyers he does not want to hear from them for at least a week of near continuous playing. Henry, who built class A amps first, didn't believe in breaking in gear either.
muralman1
1,527 posts
 
I have a different ICE amp, and what you are witnessing is well documented. Eventually it should sound fine. After break in you should try rolling what else you have in your system. Power cords should be upgraded first, and then you will find sources and speaker cables being of crucial importance to great sound. When you get it right...... you will know it.
More to discover