[Tenormech]

I've been away from the forum for most of this year, as I bought some IEMs in September and then went back to school. With one set of closed headphones, one open, the IEMs, and my Leckerton amp I haven't been jonesing for any new gear and couldn't really afford any anyway. I'm stopping by today though, because I finally made the switch from the 8610 opamp to the ADA4627 that I bought from a forum member way back in September.
 
I'm surprised by what a difference these new opamps make with my Grado 325is. It's a different signature for sure. The resolution sounds much better to me, although I find them less mellow on the ears. I may switch back and forth a bit, but for the moment I'm really digging the increased details, as I'm hearing new things in my music. It makes me very glad I purchased an amp with opamp rolling capabilities.

 

[headwhacker]

I've been away from the forum for most of this year, as I bought some IEMs in September and then went back to school. With one set of closed headphones, one open, the IEMs, and my Leckerton amp I haven't been jonesing for any new gear and couldn't really afford any anyway. I'm stopping by today though, because I finally made the switch from the 8610 opamp to the ADA4627 that I bought from a forum member way back in September.

I'm surprised by what a difference these new opamps make with my Grado 325is. It's a different signature for sure. The resolution sounds much better to me, although I find them less mellow on the ears. I may switch back and forth a bit, but for the moment I'm really digging the increased details, as I'm hearing new things in my music. It makes me very glad I purchased an amp with opamp rolling capabilities.

I have a 325e coming in, I will definitely look forward into trying UHA6SMKII. SR80i already sound good on it with AD797.

 

[Tenormech]

After a few more days I'm completely enthralled with the ADA4627. I find them more revealing, including at the low end. My stock opamps are the 8610. Maybe I'll try some of the other options someday, but for now I'm loving these.

 

[duydangle]

  After a few more days I'm completely enthralled with the ADA4627. I find them more revealing, including at the low end. My stock opamps are the 8610. Maybe I'll try some of the other options someday, but for now I'm loving these.

What version of ADA4627 do you get? I am also looking for ADA4627 and AD797.
 
I am using LME49990 instead of AD8610. LME49990 is excellent in high and soundstage but I do prefer AD8610 for bass quality. I will switch back to AD8610 to have a more exactly comparison.

 

[penchant]

 


What version of ADA4627 do you get? I am also looking for ADA4627 and AD797.

I am using LME49990 instead of AD8610. LME49990 is excellent in high and soundstage but I do prefer AD8610 for bass quality. I will switch back to AD8610 to have a more exactly comparison.

I also settle down with LME49990. It has great resolution, treble and staging. The bass might need more weight, but it's ok with my IEM. Sometimes I think it is a little loose, but compared to the more "refined" yet "confined" sound of 627 or 797, this sounds more natural to me.

 

[Fegefeuer]

Anyone did a comparison with the JDS LABS C5D? SQ? Power? Driving various headphones? Hiss? Noise? 
 
I'm trying to choose between those two for my Iphone and additionally double amping or portable DAC/AMP for my work PC. The Leckerton does have an optical input which would greatly benefit my PS4 (for the case a game does HRTF mixing by itself, like future Morpheus titles).

 

[headwhacker]

  Anyone did a comparison with the JDS LABS C5D? SQ? Power? Driving various headphones? Hiss? Noise? 
 
I'm trying to choose between those two for my Iphone and additionally double amping or portable DAC/AMP for my work PC. The Leckerton does have an optical input which would greatly benefit my PS4 (for the case a game does HRTF mixing by itself, like future Morpheus titles).

 
I had C5D before and compared it to UHA-6SMKII with ADA-4627-1A using JH16. I hear more details and clarity on UHA-6S or at least instrument separation is better on UHA-6S. I also think it is more transparent than C5D. I never like the C5Ds bass boost because it feels like it muffs the mids and highs.
 
I even like my UHA-4 with OPA627 than C5D. In terms of output power, C5D is on par with UHA-6S.

 

[Fegefeuer]

Thanks headwhacker.
 
With the dual op amp option I could have even more power for (trans)portable headphones like the TH-900 or T5p/Sig DJ. I won't aim for a harder to drive headphone like the T1 as it might not be powered with well enough swing. Could have been cool of course if possible. 

 

[headwhacker]

  Thanks headwhacker.
 
With the dual op amp option I could have even more power for (trans)portable headphones like the TH-900 or T5p/Sig DJ. I won't aim for a harder to drive headphone like the T1 as it might not be powered with well enough swing. Could have been cool of course if possible. 

 
I'm waiting for an amp only design at around the same size but have enough power for something like a T1. If Nick can match the performance/power of O2 at UHA-6SMKII form factor then it will be awesome.

 

[Fegefeuer]

A pity that there's no O2/ODAC design with optical or additional coaxial input. Would be a major package for many needs. 

 

[thegunner100]

Has anyone tried the AD8620ARZ opamps and or compared it to the ada4627? 

 

[gnarlsagan]

Has anyone tried the AD8620ARZ opamps and or compared it to the ada4627? 

Yes, and I posted impressions earlier in the thread. Verdict: I didn't hear a difference.

 

[thegunner100]

Yes, and I posted impressions earlier in the thread. Verdict: I didn't hear a difference.

I did a search on the thread and saw that you compared the 8610, not the 8620. 

 

[gnarlsagan]

I did a search on the thread and saw that you compared the 8610, not the 8620. 

Ah okay thanks for clarifying. Haven't heard much about the 8620.

 

[Bugdozer]

The 8610 and 8620 are the same OPA but the 8610 is a single and the 8620 is a duel. In reading on the Leckerton web site, the 8620 will give you more gain with low impedance headphones by running duel OPAs for each channel.  For me, I don't have a need in my Leckerton but I do run a single 8620 in my iBasso P4.