WOPL 400 4-Fin Blew the -15v Pico Fuse
- Thread starter Boater222
- Start date
Resolved the issue and yes in roundabout way was preamp. Found the TT, the tuner, the CD player all worked fine, only the streaming audio was the problem. CD and streamer go thru same DAC. So anyhow, there is setting on output voltage in the streaming software, changed it from what I would consider standard 2.0V to 1.0V and wala, issue is gone. Guessing 2.0V setting is actually more than that in reality and tube preamp was getting overloaded. Thanks for all the input. The WOPL is seemingly bulletproof as well as sounding superb. I can remember back in the days before full monty WOPL and cranking loudly was always clouded with worry about failure (had lots of empirical evidence) No more worries, just trouble free operation. Thank you Joe!
Interesting because an audio forum I used to frequent would say to turn up the preamp to max and limit the input (presumably with a volume or sensitivity control) on the amplifier for the desired sound pressure level.
I tried this and what I found was that the distortion was lower with the preamp at max and the power amp set lower. I assumed the opposite, but there it was.
Also, guitar players know, to get the "dirty" sound you have to crank up the amp and keep the volume control on the guitar at a level that will not melt your eardrums; not the other way around.
Of course, none of this means anything to a PL400 because there is no limiting potentiometer on the input.
I tried this and what I found was that the distortion was lower with the preamp at max and the power amp set lower. I assumed the opposite, but there it was.
Also, guitar players know, to get the "dirty" sound you have to crank up the amp and keep the volume control on the guitar at a level that will not melt your eardrums; not the other way around.
Of course, none of this means anything to a PL400 because there is no limiting potentiometer on the input.