Simplifi Audio - DSpeaker 2.0 ultra power supply

Yes it does have a large transformer!
I recently took over my daughters bedroom as my listening room, with no dedicated outlet in that room yet.. When I would dim the lights on the ceiling fan there would be a buzzing through the speakers. After I hooked up the 11A the buzzing stopped.
Fantastic for 12vdc gear!
Do tell what you hear.

Rodge827, Its going to be hard to tell, for I am using the DSPeaker only on my subs. I assume that like all power supplies it will probably take time for the electronics to break in. But based on what I see inside of this thing it was a very good buy.

Rodge827, I performed some modification to the Astron power supply.
I like the fact that it has a detachable IEC but it is so close to the spade/banana terminals that only the cheapo power cord it came with could be used.
So,I removed the spade/banana terminals and soldered a 12V quick disconnect plug using only the top hole for connection.
Now, I am able to experiment with better after market power cords. I also put one of the WA Quantum fuse stickers on the fuse.

Just wanted to say I just bought the Dual Core from Underwood HiFi but Tim has been helping me with advanced calibrations and performing room response readings , numerous emails and phone calls. I believe he is now or soon to be offering free consulting. You send him your results and he gives recommendations. He knows everything there is to know about the dual core. Things the average person, at least me would never figure out through the directions. He is going to try and have Dspeaker put out a video on advanced operation of the dual core it is really capable of so much. The new power supply is only coming out possibly this week. I know he is going to Munich this week. Anyway , I certainly believe your problems but I have only positive things to say and very happy with the dual core's performance for room correction and preamp.