Bizarre issue (Audio Alchemy)

hgeifman
see above.
I used the Dectet successfully with old system-- Linn Axis--Classe CDP10-into Conrad Johnson PV10 to the Krell no problems.
(only the Krell into the High Current input). No problems.

So far with PS-5 powering the AA units plugged into the wall (Rega, CD player into the Dectet) seems to be fine--at least now. 

It sounds like the Audio Alchemy DDP-1 DAC/pre amp with the PS-5 power supply upgrade needs to be plugged direct into the wall plug and not connected to the PS Audio Dectet.   Please keep us posted on how this works.   

"Inside the PS-5 are two separate, regulated power supplies: one for analog circuits, the other for digital and control circuits, which provide each the unique power qualities required to maximize their performance. These discrete supplies are routed into the DDP-1 (DAC/Preamp/Headphone Amp) through a special multi-pin connector on the rear of the unit for easy connectivity.

Additionally, the AC-to-DC conversion is performed inside the PS-5 to prevent interference with the sensitive analog audio circuits inside the DDP-1.  A balanced supply with separate analog and digital/control feeds, separate positive and negative rails for analog circuits, and large banks of storage capacitors for better filtering and improved dynamics".

Based on the above technology, my assumption is the Audio Alchemy PS-5 Power Supply needs to be plugged DIRECT into the wall plug and not the PS Audio Dectet.   

Yes I think the PS Audio Detect needs to be totally removed, use some cheap power strips if u need to. Try this out and let us know what happens.

Matt M

Here's the latest.
(I did follow advice and plugged the PS-5 power supply directly into the wall)
After several hours of trouble free operation "it" happened again. Loud horn like noise. I "played with" the volume control on the DDP-1 and this time the noise was impacted it cut in and out. I also noticed the volume indicating numbers on the DDP-1 turn red (opposed to normal black) and commence flashing.

I then turned everything off.
After a few minutes I powered everything up and --no problem.

At this point I called Audio Advisor and spoke with a tech.  He agreed the suspect, having replaced the PS-5 power unit--was likely the DDP-1. He noted microprocessors can go awry. Though not a common occurrence. 

They are shipping out a new DDP-1 (I will return the unit I have when it arrives). I have to note Audio Advisor couldn't be easier to deal with. I will break everything in my system down and re connect--carefully! Then it's crossed fingers time.

You folks here have introduced an interesting area for consideration.
The Dectet has worked fine--the Krell is plugged into the "high current" section and everything else into the two other "isolated" sections.

Set up instructions for the Audio Alchemy--DDP-1, PS-5 power unit and the PPA-1 phone pre do not get specific about ultimate power sources. I am pretty sure the problem was not the Dectet. Obviously some protection between the wall plug and expensive equipment is a must.

I am going to contact Peter Madnick at Audio Alchemy with all this and see what he has to say. Obviously if it is the DDP-1 Madnick will get the unit back from Audio Advisor. The issue of the Dectet and power sources is worth some expert advice regardless.

Hopefully the replacement DDP-1 will resolve the issue.  

We are entering a brave new world here. The DDP-1 is a very sophisticated piece of equipment--far more so than the old (and simple) Conrad Johnson it is replacing. That complexity is precisely why I am buying the Audio Alchemy units. I am ultimately going to add digital storage/player to the front end. (in the interim I am likely going to use my AK240 as a music source into the DDP-1).

I have to again note just how good the Audio Alchemy units are sound wise and offer a lot of flexibility. Hopefully I just got a "bad" DDP-1.

Also--this forum has a lot of benefit. I plan on being here regularly! Also will update you on how this "adventure" goes!