crackling sound out of right speaker

I am going to be working with the deal on this issue. And to ansswer Lewm's question, I physically switched left & right speaker cables, also switched cables alltogether so I think something is going on with the speaker.

Zd542 to answer your questions.
No I didn't swap IC's, just the speaker cables.
I believe that I hear it from both the midrange & tweeter.
I hear the noise both when I have the volume all the way down and when the volume is up, however it seems more pronounced when the volume is all the way down.

Hi Marakanetz, I'm not going to jerk it up and down, however I did adjust the volume and didn't notice any difference. I don't have a replacement preamp or receiver, I'm going to be bringing both the preamp and amp into the shop for testing.

Almarg, at the amp, I switched the left and right speaker cables so basically, left is right and vice versa.

Still the same issue with crackling in right channel, even with new input tubes. I'm over it...selling the amp and buying something else.
Thanks for all your suggestions.
I have an opportunity to buy a rogue eighty eight power amp, any thoughts on that piece?

I'm going to try moving some power cables that may be causing RFI/EMI and see what happens. Assuming that doesn't work, I'll reach out to my local dealer and see what they can do.
Thanks for all the great information and suggestions.

I brought the pre, amp and right speaker into the shop, the owner assured me it wasn't the speaker, he believes it's the input tubes in my amp, he loaned me a integrated amp and after hooking it up, the right speaker sounds fine. ill let everyone know what the actual culprit is as soon as I can.
thanks for all your suggestions

I did some more troubleshooting prior to bringing my equipment in and the issue moved to the left channel when I swapped left and right speaker cables, I guess we'll see what happens when I get my equipment back.

Lewn; I've done the following:
Changed speaker cables (tried different cables)
Switched Left and right speaker cables (the crackling moves from right to left)
Moved interconnects (right to left and vice versa)
Tried a different amp which didn't produce a crackling sound.
Replaced input tubes in preamp and amp.
Although I did notice that the crackling did become less after changing input tubes in the amp.

Lewm; agreed I believe it is fixable but quite frankly I'm a bit tired of messing around with it. I have had the amp in the shop and they said that nothing's wrong with it. I am sort of at my wits end with it, It's a great amp, considering the issues I've had and I don't plan to throw the amp away but to sell it with full disclosure what has been the issue and what has been done.

@Bevis yes I have changed interconnects as well.

I have talked to the tech on the phone, I'd rather not him come to my house. I;m over it....

I had one of the tech's out today and they seem to think that the issue is a ground loop of some sort, we found a hum coming from the speakers, unfortunately we weren't able to narrow it down to what specifically it could be.
I also did try to wiggle the tubes a bit to see if any change, but no change better or worse.

On another note, I was borrowing a rogue eighty eight from the same shop and today when I was listening to some music, the amp just quit working.

Lewm, you may very well be right. Here's the odd thing. I haven't noticed any crackling noise in the Sonic Frontiers Amp recently although there's still a hum which is a ground loop. The reason the rogue quit working, the fuse in the amp blew.