Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › The "Lovely Cube" Headphone Amp (Lehmann Black Cube Linear Clone)
New Posts  All Forums:Forum Nav:

The "Lovely Cube" Headphone Amp (Lehmann Black Cube Linear Clone) - Page 6

post #76 of 1038
9/18/10 at 9:35pm
Quote:
Originally Posted by sunneebear View Post

Finally got some time to put the pair of amps together.  Only a mock-up to set the layout for the case.  I am running it with a pair of LM4562 in class A (Purrin).  This thing sounds sweet.  Balance and SE.  All I have to do now is disassemble it and put the finally touches on the case and maybe some cosmetic work.  Thing is, it sounds so good I can't stop listening.  Next weekend I guess.


That is freaking-licious-awesome!!!  What DAC are you using?


Edited by purrin - 9/18/10 at 9:39pm
Reply

Head-Fi's Best Sellers

post #77 of 1038
9/18/10 at 9:39pm

Quote:
Originally Posted by dlaloum View Post

Very cool - where does one look up how to make a balanced amp?

You will need a balanced DAC. Get two amp boards. Feed DAC outputs L+ and L- into L and R channels on amp #1. Feed DAC outputs R+ and R- on L and R channels of amp #2. Instead of L, R, Ground on headphones, you wire L and R channel of amp #1 into Left headphone driver, and L and R channel of amp #2 into Right headphone driver.  You just leave ground unused.
 
Reply
post #78 of 1038
9/18/10 at 9:46pm
Thread Starter 
Quote:
Originally Posted by sunneebear View Post

Finally got some time to put the pair of amps together.  Only a mock-up to set the layout for the case.  I am running it with a pair of LM4562 in class A (Purrin).  This thing sounds sweet.  Balance and SE.  All I have to do now is disassemble it and put the finally touches on the case and maybe some cosmetic work.  Thing is, it sounds so good I can't stop listening.  Next weekend I guess.


Beat me too it! :) Looking forward to some pictures!

Reply
post #79 of 1038
9/18/10 at 10:00pm
Quote:
Originally Posted by purrin View Post




That is freaking-licious-awesome!!!  What DAC are you using?


Matrix Mini-i.

 

I have a set of Burson opamps that is currently split up in halves and used in other DIY projects.  Guess I will be soldering it back together while I enjoy the music.

Reply
post #80 of 1038
9/18/10 at 10:25pm
Quote:
Originally Posted by francisdemarte View Post




Beat me too it! " class="bbcode_smiley" height="" src="http://files.head-fi.org/images/smilies//smily_headphones1.gif" title=":)" width="" /> Looking forward to some pictures!


Balance Cube HPA.jpg

Reply
post #81 of 1038
9/18/10 at 10:46pm
Thread Starter 

Awesome build! What are you using for the volume control?

Reply
post #82 of 1038
9/18/10 at 10:59pm

The original pots driven in sequence by a geared counter shaft.

 

Pot.jpg

Reply
post #83 of 1038
9/19/10 at 4:09am

Just put the old Burson opamps back together and plugged them in.  Headroom, detail, extension and all ooohh sooo smooothhh.

Reply
post #84 of 1038
9/19/10 at 4:56am
Quote:
Originally Posted by sunneebear View Post

Just put the old Burson opamps back together and plugged them in.  Headroom, detail, extension and all ooohh sooo smooothhh.


What ic opamp were u using?

Reply
post #85 of 1038
9/19/10 at 6:32am

LM4562 in class A as suggested by purrin.

Reply
post #86 of 1038
9/19/10 at 8:09am
Thread Starter 
Quote:
Originally Posted by sunneebear View Post

The original pots driven in sequence by a geared counter shaft.

 

Pot.jpg


That's a ingenious solution and a great alternative to a pricey 4 gang pot. Did you make that or did you buy it where?

Reply
post #87 of 1038
9/19/10 at 8:51am
Quote:
Originally Posted by sunneebear View Post

The original pots driven in sequence by a geared counter shaft.

 

Pot.jpg

 

/emote worship

 

You are a mastermind!
 

Reply
post #88 of 1038
9/19/10 at 12:38pm

Thanks for the kind praise guys but I'm pretty sure I'm not the first to do this.   The idea came to me out of necessity.  When I first started DIYing, I could only afford used or surplus parts.  I found two mono Noble pots for dirt cheap and came up with this idea to use them.

Reply
post #89 of 1038
9/19/10 at 4:25pm

Necessity is the mother of invention

 

The pots are brilliant!

Reply
post #90 of 1038
9/23/10 at 11:48pm

Finally put the finishing touches on my balance Lovely Cube.  It's a cheap case but hey it works.

 

Face.jpg

 

The completed layout.  Sorry for the blurry phone pictures.

 

completed amp.jpg

 

I am running it with the Burson dual op amps.  I also put larger heat sinks in the two transistors in front of the two large capacitors because they get pretty hot.  Is this normal for this amp?  Even with the large heat sinks the case gets pretty hot when I put the cover on.  I will be putting holes or a grill of some sort on the cover when I get a chance.  I am pretty sure that the amount of heat generated is acceptable but I don't like hot amps so I will try to remedy this issue.

 

Burson op amp & heat sinks.jpg

 

Anyone with this amp or the M-Stage think it runs kind of hot?

Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)

Head-Fi's Best Sellers

Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › The "Lovely Cube" Headphone Amp (Lehmann Black Cube Linear Clone)