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Peachtree audio iDecco - not hearing any difference with the tube on or off.

So I bought a used iDecco and I am using it as a DAC preamp. It is connected to an Onkyo equalizer via its Line Out and the equalizer is connected to my Artcoustic PA300 power amp. I have no complains about its sound as is, I am extremely happy with my current setup, But I noticed that the tube does not really have any impact to the sound? Is it because I am using the iDecco as a DAC and not as an integrated amp? I havent had the chance yet to connect the speakers directly to the idecco and test the tube. I also just recently changed the tube from 6nj1 to Amperex orange label ECC88/ 6DJ8. I just cant hear any difference at all whether the tube is on or off.
jepoy
tuberist
951 posts
 
my tv system employs a Nova 125se and I could hear a slight loss of dynamics with the tube activated. pro reviewers have said the same. 
jepoy OP
6 posts
 
tuberist165 posts06-19-2019 1:38ammy tv system employs a Nova 125se and I could hear a slight loss of dynamics with the tube activated. pro reviewers have said the same.


Thanks for replying. Are the speakers directly connected to your nova?
reubent
7,071 posts
 
I had a Decco65 for a short time. I heard a slight difference when the tube was engaged in the circuit. Mostly what I heard was an overall softening of the music. Didn't really care for it with the tube engaged. Too soft.
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