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PostPosted: April 7th, 2021, 11:20 am 
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Joined: June 4th, 2013, 2:39 pm
Posts: 306
Pelliott321 wrote:
A couple years ago I built a little SS phono preamp kit from DIYAUDIO that was designed to run on batteries. I was interested because I wanted to see the differences between 9 Volt batteries, SLA, and LiPo would sound like.
The 9 v batteries was horrible. The big SLA was a bit better and the LiPo was the best, probably because the internal resistance of the LiPo was the lowest.
The less than $100 board still was not very musical so I tried using a leftover shunt regulated PS from Twisted Pear that supplied mort than 10 times the required current and the sound was great.
In fact that phono preamp is living in a friends Uber system replacing a $6500 Ron Southerland phono and my friend could not be happier.

But....

My friend just cannot live with a cigar box phono preamp in his Uber-system so at his direction I am building for him an AN L3 phon preamp at almost $2k for him. Will see how this compares to the cigar box.


Auidiophiles are funny. ;-) I would be proud to have a cigar-box preamp that beat a $6500 one, and would make it the visual centerpiece of my system. ;-)


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PostPosted: April 7th, 2021, 11:38 am 
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Joined: January 15th, 2015, 7:19 am
Posts: 1389
Location: Baltimore MD
When I get the cigar box back from my friend if he decides on the $2k AudioNote Kit I am building for him the I will have the cigar box bronzed.
I will need to go back and compare it to my present phono preamp


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PostPosted: April 12th, 2021, 9:34 am 
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Joined: March 12th, 2013, 11:12 am
Posts: 657
The non-ferrous, non-resonant cigar box might contribute to the great sound, you might find the same circuit in a big metal box sounds worse? :obscene-drinkingcheers:



Grover Gardner wrote:
Pelliott321 wrote:
A couple years ago I built a little SS phono preamp kit from DIYAUDIO that was designed to run on batteries. I was interested because I wanted to see the differences between 9 Volt batteries, SLA, and LiPo would sound like.
The 9 v batteries was horrible. The big SLA was a bit better and the LiPo was the best, probably because the internal resistance of the LiPo was the lowest.
The less than $100 board still was not very musical so I tried using a leftover shunt regulated PS from Twisted Pear that supplied mort than 10 times the required current and the sound was great.
In fact that phono preamp is living in a friends Uber system replacing a $6500 Ron Southerland phono and my friend could not be happier.

But....

My friend just cannot live with a cigar box phono preamp in his Uber-system so at his direction I am building for him an AN L3 phon preamp at almost $2k for him. Will see how this compares to the cigar box.


Auidiophiles are funny. ;-) I would be proud to have a cigar-box preamp that beat a $6500 one, and would make it the visual centerpiece of my system. ;-)


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PostPosted: April 12th, 2021, 10:16 am 
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Joined: January 15th, 2015, 7:19 am
Posts: 1389
Location: Baltimore MD
Gary Dews of BorderPatrol only uses copper in his chassis (even in his budget DAC) at great expense and difficulty in getting them made.
He would use wood if allowed by UL.


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