citysoundman
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- Joined
- Dec 25, 2021
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I've got a Definitive Tech PF15 sub, purchased in 1995. It has both low level RCA and high level speaker connections. I've always used the RCA connections from my Rotel preamp. I also have a Rotel power amp, which gets a separate feed from the preamp.
Yesterday after changing some stuff in my rack and disconnecting and reconnecting cables, the sub doesn't work - no audio is coming through but I hear a steady tone (60Hz?) that changes in volume as I adjust the volume pot. The tone is constant. But it goes away when nothing is connected to the RCA inputs. FYI I don't believe the subs RCA outs ever worked - I remember trying to send the signal through the sub to my amp input to try and use the sub crossover and never got an output signal so I guess there has been an issue here.
After feeling kinda dejected with the lovely thought of needing to get this beast serviced I tried the high level speaker connections and it seems to be working. That's a relief!
So I'm interested to see if anyone can help diagnose what the problem might be. Perhaps I can try and fix it if it seems doable.
And also, what's the consensus on using low-level vs high level connections? Is one preferred over the other?
Yesterday after changing some stuff in my rack and disconnecting and reconnecting cables, the sub doesn't work - no audio is coming through but I hear a steady tone (60Hz?) that changes in volume as I adjust the volume pot. The tone is constant. But it goes away when nothing is connected to the RCA inputs. FYI I don't believe the subs RCA outs ever worked - I remember trying to send the signal through the sub to my amp input to try and use the sub crossover and never got an output signal so I guess there has been an issue here.
After feeling kinda dejected with the lovely thought of needing to get this beast serviced I tried the high level speaker connections and it seems to be working. That's a relief!
So I'm interested to see if anyone can help diagnose what the problem might be. Perhaps I can try and fix it if it seems doable.
And also, what's the consensus on using low-level vs high level connections? Is one preferred over the other?