2. amps-preamps
  3. 192410-110112

Lower power on left channel

Hi all, 

Does anyone have any ideas or come across this before?

I have a Primaluna Evo 300 pre-amp with a Primaluna Evo 400 power amp, using G/L KT 88 tubes. The other evening I was sat there playing some music and suddenly thought that it did not sound right, as I stood up and walked towards the centre of my speakers I noticed the the left speaker was down on volume compared to the right speaker. As I went to turn the system off I noticed that the KT88 tubes where down on heat to what they normally are.

I can not do much now till after Christmas but any help would be much appreciated

Merry Christmas 

Steve.       

bigred71

Showing 4 responses by bigred71

bigred71's avatar
bigred71 OP
17 posts
 

When I can get to the back of the amp I am going to change the speaker cables over and see if the loss of power is then on the right hand channel.

 

bigred71's avatar
bigred71 OP
17 posts
 

Hi Guy's

I have not checked the red light (bad tube indicator) I did not notice that any of them where on when leaning over the amp checking the heat of the tubes before turning the amp off, I will have to power the amp and check at the same time as changing the speaker cables over. Source wise, I have  tried change the input on the pre amp from Dac to phono pre amp, that did not make any difference.    

bigred71's avatar
bigred71 OP
17 posts
 

,

bigred71's avatar
bigred71 OP
17 posts
 

After swapping the speaker cables over on the rear of the amp the left speaker was still down on volume, I then removed the speaker grill and found that the Mid's speaker was not working. Removing the mid speaker I found that one of the connecting wires was off the terminal, after re-soldering the wire back on and refitting to the speaker, hey presto the all good.

Thanks guys for all your thoughts and Idea's 

Happy New Year

Steve.

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