Head-Fi.org › Forums › Equipment Forums › Portable Headphone Amps › New Leckerton UHA-6S MKII Portable Headphone Amplifier Announced (Update User Impressions Added July 20th 2012)
New Posts  All Forums:Forum Nav:

New Leckerton UHA-6S MKII Portable Headphone Amplifier Announced (Update User Impressions Added... - Page 132

post #1966 of 2193
Subbed.
post #1967 of 2193
I've been using this great amp for 2 weeks now and spent several hours comparing with O2. As far as transparency, detail resolution and imaging goes they are quite at the same level. The UHA-6SMKII appers to be a bit more balanced overall and does not bring any part of the music into a highlight. Whereas O2 seems to have some details in the highs a bit recessed compared to bass details.

The O2 though has a bit more thump in the bass than The 6SMKII. But it's not easily detected and with casual listening one would think they are the same. Overall they have more similarities than difference, especially in presentation, transparency and detail retrieval.

Anyone who has tried different opamps on 6SMKII care to share impressions on OPA627, ADA4627-1A and ADA4627-1B in particular.
post #1968 of 2193

Hey,

I'm using my 6s-mk2 with OPA209AID, and tried a new ADA4627-B (bought directly from Leckerton-Audio);

 

The 4627 has somewhat little less treble air (which translates into a little less shrilling, more forgiving treble, but i think also less detailed) - which makes the entire presentation seems a less brighter one.

Because this change, the bass seems bigger this way, and the effect goes to the sound-stage also a tiny bit.

 

personally, I preferred the more analytic approach (209). YMMV.

post #1969 of 2193
Thanks I like how the ADA4627-1A so far and I agree the bass is big on this opamp. I suppose the B variant should sound the same as the A and if you find it had less treble detail than 209, I think 209 will be brighter for me cause I find the 4627 already detailed but neutral.

Thanks for the impression, my biggest concern with OPA209 is being prone to interference.
post #1970 of 2193

I found the best way to use the UHA-6SMKII is as a source connected to my Mac using the optical/TOSLink cable. The soundstage is wider, imaging and details from the bass region to the highs are clear, smooth and well extendend with a very controlled presentation. The micro details are very clear and blends in very well with the music. The bass is bigger but not boomy. More details are actually getting resolved. Just amazing. 

 

I was expecting the same performance using the coax cable connected to my DX50 but the details are not as clear and the overall sound is softer in comparison.

 

I think people are ignoring/downplaying the Cirrus Logic DAC inside the UHA-6SMKII because it's not as popular as the Wolfson or the ESS Sabres. For me the TOSlink to Mac setup using the CL DAC is much better than my DX50 with a Wolfson chip connected to the UHA-6S via Line Out.

 

Nick really knows and does a good job implementing the CL chips inside his amplifiers. It's just a shame the USB is limited to 16/48. I hope he can upgrade this to 24/96 in future releases.

post #1971 of 2193

I think the UHA760 does this though?

post #1972 of 2193
Quote:
Originally Posted by lee730 View Post
 

I think the UHA760 does this though?

 

UHA760 adds half a step of an improvement over UHA-6SMKII overall but taken 2 full steps back on input options since it doesn't have the Coax and TOSLINK inputs. Not to mention a shorter battery life.

 

Nick however, will be adding them back to the next version of UHA760 or maybe a new amp adding 24/192 support but on a bigger case.

 

It would be nice if he is able to do this without making the amp too big.

post #1973 of 2193

I though the choice of 16/48 was to maximize compatibility over usb. you will most probably have the same sample choices as the UHA6 mkII when other connectivities become available (and they will).

post #1974 of 2193
Quote:
Originally Posted by headwhacker View Post

I've been using this great amp for 2 weeks now and spent several hours comparing with O2. As far as transparency, detail resolution and imaging goes they are quite at the same level. The UHA-6SMKII appers to be a bit more balanced overall and does not bring any part of the music into a highlight. Whereas O2 seems to have some details in the highs a bit recessed compared to bass details.

The O2 though has a bit more thump in the bass than The 6SMKII. But it's not easily detected and with casual listening one would think they are the same. Overall they have more similarities than difference, especially in presentation, transparency and detail retrieval.

Anyone who has tried different opamps on 6SMKII care to share impressions on OPA627, ADA4627-1A and ADA4627-1B in particular.

I only have the OPA627 but they sound lovely : warm, deep, great soundstage, and yet with detail. Others have described them as sounding "tubey",to which I would agree.

If nothing else they have a great musicality about them - they do just do sound great.

I am sure you must feel the same when you listen to your MK1 amp with them in. Can you not take them out of their and try them in the MK11?
post #1975 of 2193
Quote:
Originally Posted by highfell View Post


I only have the OPA627 but they sound lovely : warm, deep, great soundstage, and yet with detail. Others have described them as sounding "tubey",to which I would agree.

If nothing else they have a great musicality about them - they do just do sound great.

I am sure you must feel the same when you listen to your MK1 amp with them in. Can you not take them out of their and try them in the MK11?


I don't have MKI, although I have a UHA-4 with OPA627. I agree OPA627 stands out resolving details in recordings but it is lacking impact and weight in the bass. Most probably it's due to the amp overall not with OPA627.

post #1976 of 2193
Quote:
Originally Posted by headwhacker View Post


I don't have MKI, although I have a UHA-4 with OPA627. I agree OPA627 stands out resolving details in recordings but it is lacking impact and weight in the bass. Most probably it's due to the amp overall not with OPA627.

Sorry I thought the UHA-4 was the Mk1.

No lack of bass as far as I am concerned. If you liked the 627 with the UHA-4 then you I reckon will love it with the MKii. And I forgot to mention before that in my experience of using the MKii with the 627s most days whilst commuting that there is really no annoying interference from mobile phones or blackberries.
post #1977 of 2193

Hi guys,
On the UHA760, I see that the OPAMPs are soldered...

is there any workaround to this?

 

I now compare between my OPA209's 6smk2, and the 4627-1b's 760...

post #1978 of 2193
Quote:
Originally Posted by eyal1983 View Post
 

Hi guys,
On the UHA760, I see that the OPAMPs are soldered...

is there any workaround to this?

 

I now compare between my OPA209's 6smk2, and the 4627-1b's 760...

 

UHA760 doesn't support socketed opamp. I think you chose a very nice opamp.

post #1979 of 2193
Quote:
Originally Posted by eyal1983 View Post
 

Hi guys,
On the UHA760, I see that the OPAMPs are soldered...

is there any workaround to this?

 

I now compare between my OPA209's 6smk2, and the 4627-1b's 760...

 

Did you sell your 8610?

post #1980 of 2193
long long time ago
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Portable Headphone Amps
Head-Fi.org › Forums › Equipment Forums › Portable Headphone Amps › New Leckerton UHA-6S MKII Portable Headphone Amplifier Announced (Update User Impressions Added July 20th 2012)