have you replaced your fuses to see if it happens again? |
Hi Jason,
Wow...sorry to hear...and lots in your description to 'chase down'. Lets start with the basics...discconect the turntable. there is lots that can happen there we should isolate. Does the system still have weak signal and feedback without being hooked up to the turntable or the turntable even being plugged in? (ie, thru the DVD player)?
If you turn the DVD player off, and just have the preamp and amp on...do you stll get feedback/static? If yes, then it is somewhere in your preamp or amp. Turn your system off...turn back on just the amp. Still any static? If not, it could be the pre or the cable inbetween pre and amp. If yes, it could be the amp...or the wiring in your house.
If you can try to do a few of these 'easier' isolations tests...and post them back, maybe some of us can help.
good luck. |
To make sure i got it right...pre amp (on), amp (on), DVD (connected but off), turntable (disconnected and off)...no buzz no matter how loud you turn it up. That's GOOD. Once you put the DVD on, you get noise? If so, it seems to be either: a) the power strip, b) the connection between the DVD and the preamp (ie, the cable or the actual RCA in-jacks in your preamp...try different onces), or c) the actual DVD player itself. Try to avoid the 3-2 reducer on the end of the strip...it means you have no ground. that could be part of your problem?
If your amp and preamp run thru power strip just fine...plug DVD player separately into wall direct and see what happens. |
If the preamp can make the sound smaller or bigger...but the preamp and amp are silent with no source attached to it no matter how loud you turn the preamp...then it has to be source. And is probably not grounding. i did not think grounding would get louder and softer with volume.
Might be your source or your cable in between your source and preamp. Try a different cable. If same, then try another dvd player. Hope the electrician can help. |
Hi TPG,
To Jdvorak's credit, the process you descrive is exactly what he has done. He has so far determined there is complete silence with the volume on the preamp loud with teh amp on...providing there is no source connected.
So it appears to be the source of the interconnect. So he needs to connect a new source thru the same interconnect and see. If no noise, it is the source. If noise, it could be the interconnects.
Jdvorak? Any news? |
HI Jdvorak,
i believe you said when you plugged in just the pre and the amp...with no source plugged or connnected...you could turn the preamp volume way up and there was no noise.
Is this correct? |
And when you do plug in either of 2 sources...from either of 2 plug outlets...into any of your preamp inputs...there is hum which gets louder with volume. And the feedback hum is in both speakers...and also in a replacement set of speakers using the same 'problem setup'.
- not amp or speakers,
- probably not grounding which does not vary with volume
- Normally, 'feedback' occurs when you are outputting sound, and there is a microphone picking it up and feeding back into the same system. i assume there is no microphone input in your CJ preamp
- is it the interconnect?
- is it possible there is a problem with preamp...but you cannot tell if there is no source attached because (as you said, if u plug in source, turn volume down, feedback goes away).
Try different preamp, or try to see if you can plug the DVD source directly into your amp temporarily...some DVD players have a built-in internal volume control...usually terrible but it should work. |
Hi Jdvorak,
The "good news" is this is not a subtle problem that comes and goes...it is fairly black and white. Which hopefully means you've got a real problem that is identifiable by an audiotech.
Sounds like it is not your preamp.
1. Try calling Ed at CJ (Sonograph is CJ, no?) He is amazing, helpful and knowledgable.
2. What happens if you swap out the amp? Do you think you can try even tiny one you can borrow from local store?
3. Do you think it actually is radio? i have heard of some radio, rfi feedback sneaking thru somehow...RFI blocks and stuff should help but this seems like a huge 'sneaking'. |
Have you swapped out the amp? is there a small one you an borrow? |
Tbg,
I hear you...i'm no techie, so just trying eliminate variable's the 'simple man's way'. |
Fantastic!!! Very glad was able to help...he really is THE MAN! Enjoy!!! |
How do you turn on your system? Amp turns on last...amp goes off first, right? |
