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New Leckerton UHA760 Coming Soon!! - Page 7

post #91 of 117
Quote:
Originally Posted by lee730 View Post
 

 

There is differences in the design overall though including the power supply. He improved upon that on the 760. Cleaner soound, lower noise floor to my knowledge. Read the specs on his site.

 

Sure yeah it's improved. Power supply/regulation, additional crossfeed, digital volume control and 3 step gain settings, but the overall design of the amp section is similar. I asked him the same question and other than the improved/added features everything else is similar.

 

Besides, how can you hear a "cleaner" sound when it's already clean? I was thinking the difference must have come from listening with 2 different opamps. But then hearing differences is a matter of subjective opinion.

post #92 of 117
Quote:
Originally Posted by headwhacker View Post
 

 

Besides, how can you hear a "cleaner" sound when it's already clean? I was thinking the difference must have come from listening with 2 different opamps. But then hearing differences is a matter of subjective opinion.

 

There is a difference with a lower noise floor and cleaner power to the source. The Fiio X5 is a really good example of this and it shows through with its crazy micro-detailing & low noise floor. If you cannot hear that or haven't experienced that then there really is no point in dragging this on with you. Connecting my Triad L3 to its power supply vs the batteries is a huge difference (blacker background, more dynamic, bigger sound staging, improved separation/imaging, deeper bass. The better your sources & headphones/IEMs are, the more apparent those differences will be (IMO).


Edited by lee730 - 3/15/14 at 12:37am
post #93 of 117
What attracted me to buy this at first was the cross feed functionality and base on the fact that the UHA 6s Mk2 was well received. I received my UHA760 on Christmas Eve last year .... After a few months of listening to it feel that for the price tag it should have been much better (OPA627). I paired it with AK120 and 1964 ears quads with the gain on low with high cross feed. The crossfeed does help a bit but not greatly with the channel inbalance in IEMs or whatever you call it . When paired with my Audeze Lcd 2.2 on high gain I would require the volume knob to be at around 3'o clock when listening to rock or blues . When listening to some classical pieces I would have to crank the volume up to almost max volume. I feel that the power could have been better but that might compromise the extremely low noise floor which I absolutely love.
post #94 of 117

I like the RE-272's with Meier house sound.  Was going to sell the 760 until I tried them with my Blox M2c's.  I really like what I was hearing.  Have to keep it now.  Source is USB out from Surface 2.  Sweetness.

post #95 of 117

I posted a long, non informative, hard to read review on the 760(needless say, in a poor english). viewer discretion's advised. if you feel adventurous, or if you really have nothing better to do, go read it:

http://www.head-fi.org/products/leckerton-audio-uha760/reviews/10732

post #96 of 117
Haha great review, and good read. smily_headphones1.gif
post #97 of 117

I'm really liking the UHA760 at the moment. Great dynamics, great soundstage/separation (I have crossfeed set to 'bypass') and immersion (much better than the other portable DAC/amp combos that I have previously owned) and pleasurable bass rumble on my headphones that are capable of it - and I'm only using the inbuilt DAC.


Edited by namaiki - 5/3/14 at 5:43am
post #98 of 117

After reading about 3G/4G/Wi-Fi interference with the UHA760, I sent Nick an email asking which op-amp option would have the best EMI properties. Before he had a chance to answer, I found this blog entry, which would seem to answer the question. I'll update if he gives me a more detailed reply.

 

http://www.leckertonaudio.com/blog/2012/11/choosing-output-op-amps

The AD8610 is currently the best choice for most customers. It measures very well electrically, it has low susceptibility to interference, and it has a proven record in the world of portable hi-fi.

post #99 of 117

Nick's reply.

Leckerton Audio <nick@leckertonaudio.com> wrote:

Hi Jack,
 
Sorry for not getting back to you quicker. To clarify, the choice of op-amp effects how much interference noise you might get, but unfortunately none of the options will eliminate it completely. The AD8610 has relatively low sensitivity to EMI-related noise, but in some configurations you can still get low levels of buzz, depending on how near the wireless device is, how everything is cabled, etc. The UHA-6S.MKII and UHA760 both have about the same level of EMI resistance with the AD8610.
 
Both models have only one USB input, so charging and data transfer must happen over the same cable. It's not possible to use an external USB power adapter in USB DAC mode.
 
The 30-day audition period would start when you receive the amp. If you decide to return it, you would just need to get it shipped within 30 days. If I receive it after 30 days, that's ok.
 
Regards,
Nick
Leckerton Audio, Inc.

 

 

I've asked him if he has any recommendations on OTG cables for use with Android phones.

post #100 of 117

My old UHA-6SmkII with the 8610 had virtually no noise from EMI out of my Galaxy S5 via USB OTG.  Same goes for my UHA760.

post #101 of 117
Quote:
Originally Posted by Bazirker View Post

My old UHA-6SmkII with the 8610 had virtually no noise from EMI out of my Galaxy S5 via USB OTG.  Same goes for my UHA760.

Do you also have the 8610 in your 760?

Any differences in SQ between the 6SmkII and 760? Why did you upgrade to the 760?

What kind of battery life have you seen running them as DAC/amps?
Edited by gixxerwimp - 2/26/15 at 9:52pm
post #102 of 117
gixxerwimp View Post
I've asked him if he has any recommendations on OTG cables for use with Android phones.

 

Nick's reply:

I don't have any specific OTG USB cable recommendations, but generally the shorter, the better. Some OTG cables are more like adapters with a micro B plug and a standard A socket on the other – they're meant to connect to a cable with micro B and standard A plugs, but this means you end up with two cables and perhaps some unnecessary length. There are some short micro B to micro B cables around, although they don't seem that common. I've been told this cable works with Android, although I haven't tried it myself:

 

 
Regards,
Nick
post #103 of 117
Quote:
Originally Posted by gixxerwimp View Post

Do you also have the 8610 in your 760?

Any differences in SQ between the 6SmkII and 760? Why did you upgrade to the 760?

What kind of battery life have you seen running them as DAC/amps?

No, I don't. (See signature for op amp) I like the 760 better, but it's mostly because of the lower gain setting being nicer with my sensitive customs. Honestly, I don't think there's much difference between the 760 and the 6SmkII, and I wouldn't have gotten/kept the 760 if it weren't for the excellent deal I got on a used 760. The battery life is better in the 6SmkII. I don't use it as an amp, but the DAC gets 10 hours or less of battery life. It's not the best, but I can make it through a day without any trouble.
post #104 of 117
Quote:
Originally Posted by Bazirker View Post

No, I don't. (See signature for op amp) I like the 760 better, but it's mostly because of the lower gain setting being nicer with my sensitive customs. Honestly, I don't think there's much difference between the 760 and the 6SmkII, and I wouldn't have gotten/kept the 760 if it weren't for the excellent deal I got on a used 760. The battery life is better in the 6SmkII. I don't use it as an amp, but the DAC gets 10 hours or less of battery life. It's not the best, but I can make it through a day without any trouble.
Sorry, didn't see your sig on the mobile site.

If your not using it as an amp, how does low gain make a difference? Or do you still have the 6SmkII and use it as a DAC only (but there's no line out?) and the 760 as a DAC/amp?

Do you find crossfeed a useful feature?
post #105 of 117
Quote:
Originally Posted by gixxerwimp View Post

Sorry, didn't see your sig on the mobile site.

If your not using it as an amp, how does low gain make a difference? Or do you still have the 6SmkII and use it as a DAC only (but there's no line out?) and the 760 as a DAC/amp?

Do you find crossfeed a useful feature?

Low gain matters because it basically detirmines the sensitivity and resolution of the volume control. You reduce the maximum volume in exchange for finer tuning of the volume. When you're using headphones like customs or most IEM's that have a low impedance, you want to use a low gain setting while high impedance headphones will want a high gain setting.

I don't still have my mkII. I used both it and my current 760 as a DAC/amp; I don't think I ever used the analog input once. The behavior of the device is identical regardless of input. There isn't a "line out" on either device; there's one output, and it's for your headphones. I think it would be an odd setup to use this headphones output as a line out for use in yet another amp, but to each his own, I guess.

I don't use crossfeed, but some people swear by it. For what it's worth, it does work well on the 760.
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