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In Reply to: RE: Zerozone Linear Power Supply posted by Duster on September 26, 2016 at 09:20:48
At last. After a 31 day wait my Zerozone ps arrived from China via ePacket (eBay). I unpacked it and connected it to my system using the supplied umbilical cable for a quick check. It checked ok. So on to da mod.
Here we go.
Replacing the DC connector with a speakON NL2MP 2 pole chassis mount connector on the Zerozone Linear PS (as mentioned by Duster)
Remove the 4 screws at both ends which will enable you to remove the top half of the enclosure. Desolder the IEC connections and the DC connections. Remove the 2 screws holding the IEC connection to the back plate. Remove the nut holding the DC connector to the back plate. You now have the back plate free of restrictions enabling you to work freely on enlarging the mounting hole for the new speakON NL2MP connector. The diameter of the replacement connector is 24MM. When you're finished with the hole slip the connector in and center punch the back plate for drilling holes for the 2 self tapping screws or nut and bolts you'll use to mount the connector to the back plate. Now work in the reverse and resolder you wires and triple check what you've done and close it back up. As you can see their is plenty of clearance for the new connector.
I reconnected the Zerozone to the Wyred 4 Sound Recovery "Black Box" using my diy umbilical cable and let it warm up for an hour. The enclosure was room temperature warm and stayed that way overnight. The first thing I noticed on playing my favorite test files from Memoirs of a Geisha was the clean and clear sound. Next was the deeper and solider bass. To my ears the entire frequency range that my ears can hear was well represented. and had much more dynamic impact than the iFi iPower ps (wall wart) that I had been using. Great value for a modest price and a fun mod with the potential for increased performance.
FYI
Diameter of speakON connector is 24mm.
pixelphoto (Marvin)
Follow Ups:
Yet another well-done DIY project, Marvin!
BTW, what tool and tool bit did you use for the hole enlargement?
Duster, I used a handheld rotary tool with a diamond cut off blade and a semi round metal file. I first found a 25mm round washer and used it and a scratch al to indicate the new cut out location. I removed as much aluminum as I could with the rotary tool and finished with the file. A drill press and 25mm drill bit would have been perfect but I have to work with what I have and that's usually good enough for government work. Still it was a clean job. FYI, don't make the hole to large because you need enough metal for the 2 screw holes.
Nice work, Marvin. Professional looking job!
My attempt to purchase the Zerozone didn't go well -- seller claimed he hadn't received the funds, yet refunded the money (that he insisted he hadn't received) within 10 minutes of my dispute submission to Paypal. Then he suggested I try and order again (!).
I decided to build the AMB Sigma 11 unit that the Zerozone copies. Haven't put it together yet (waiting on a few last parts from Mouser), but when I got to the DC cable connector, I figured that since the power supply will be dedicated to my Wyred Remedy reclocker, why use a connector at all? The best sounding connector is usually no connector. :) I'm going to run the cable straight into the terminal blocks on the circuit board, and just use a clamp/strain relief (link below) where the cable goes through the back wall of the enclosure. If I was going to move the thing around a lot the connector would make more sense (less flexing on the wiring), but I envision it just sitting there once I get done with it.
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