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The "Lovely Cube" Headphone Amp (Lehmann Black Cube Linear Clone) - Page 79

post #1171 of 1173

I've finally finished

post #1172 of 1173

Finished with the new power supply with changed voltage regulator? Any conclusions about the final sound?

post #1173 of 1173

Sorry about taking so long to get back.  I ran into an issue.  I can use my shunt PS on either the positive or negative but not both at the same time.  Let me explain!  When I hook up the positive or negative alone it works fine on that channel but if I hook both up at the same time it blows a 1.25 A fuse.  I'm not sure why it does this as the original design only uses around 145ma per channel and and I've been testing the PS with over a 200ma load on each channel without any issues.

 

I haven't give-up on this idea.  I ordered a new pcb for about $4 and I will build it up and play with it.  My current set-up is working good and I don't want to tear it apart and break it.

 

I just built a Millet Maxed with BJT's and it's sounding very good and have The Wire and Marsh Headphone amp waiting.  Half of the fun is the building for me.  But I do love listening as well.

 

 I will post the results.  If someone has a theory of why it's drawing so much current with both the positive and negative supplies hooked up I would like to understand this problem.

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