Axiom Home Page Forums General Discussion Technical Questions Axiom LFR DSP+ADA1000 amp random noise problem

What, no house calls?

I have no problem in shipping the DSP up to them. I can run the speakers with just the fronts (sans dsp).

It is an interesting poser. As there are simply just too many variables to really point the finger at the cause of the problem. All we can really do is eliminate the likely causes and see what falls out in the process. I know I am in good hands and Andrew is onboard to trying to figure out what is causing this. I'm in good hands as they say.

Why not just turn the dsp off?
I cant imagine a benefit to leaving my system power up while I'm not I'd using it.

The DSP doesn't have a 12v trigger so if you are turning it off, then you have to remember to turn it back on. With the rocker power switch at the back of the unit that is a bit of a bugger when it's mounted on a rack.

I am shipping the unit back to Axiom hopefully today, but I might wait until Monday so it's not sitting in a Fedex warehouse over the weekend.

The issue with the DSP has gotten worse, as I was watching NetFlix yesterday and the crackle/buzz sound started happening during normal listening, so I think it's an actual failure inside the unit. That actually is good news as if you can get it doing the problem most of the time it's far easier to diagnose and fix. Also helps to point to where the issue is coming from.

Huh
I assumed there would be a trigger

A trigger isn't needed because the DSP consumes very little power in standby.

FWIW, last week I heard a noticeable but not very loud somewhat rhythmic noise coming from somewhere in my system after turning it off. It lasted for no more than a minute then went away on its own. I had been playing music fairly loud and for a good few hours before this, but the noise was neither loud enough nor lasted long enough after shutdown that I was motivated to investigate further, so I can't say whether it was only coming from my LFRs or also other speakers. However, given that the DSP is the only component that doesn't automatically power off, they are an obvious suspect.

Perhaps this is an annual Halloween Easter Egg that Ian and Andrew built into the DSP?

It could have been your ADA.

I have just got my DSP back on Friday. I will see if the issue has been fixed and hopefully Andrew has left some notes about what he found inside the box.