[switchg3ar]

Hi,
 
I have a question regarding this product which I can't seem to find the answer through other means. Does the volume control the balanced output or just the headphone jack? I'm not 100% clear on this issue.
 
Thanks

 

[onef]

Just a friendly reminder, HLLY is a company that started up by manufacturing cheap imitations of better audio gear on the market (LittleDot/Trends/Dayton) and while their newer stuff may seem alright, be aware that their founding products were rip offs. 
 
The new KIAs may be alright automobiles, but at the end of the day they're still KIAs.

 

[mrarroyo]

Quote:

mrarroyo,
 
Did you have to adjust down the voltage in the SMK-III in order to use the AD8620 and AD8397?  I have the DMK-IV and noticed in the schematic posted by David-gao that the supply voltage is +/- 15 vdc.  The AD chips mentioned use a bit lower voltage.  Is the voltage lower on the SMK-III, in order to allow the op-amp rolling?  Or is it easily adjusted?

Sorry for my late reply, no I did not adjust the voltage to use the AD8610 or the AD8397. The AD8610 accepts up to 13V and the AD8397 up to 24V, see attached files. Thanks.
 
http://www.analog.com/static/imported-files/data_sheets/AD8610_8620.pdf
 
http://www.analog.com/static/imported-files/data_sheets/AD8397.pdf

 

[david-gao]

Yes, Do not need adjust the power Voltage when you replace the OP275 to other compatiable double OP AMP
 
Thanks

 

[willr666]

Quote:

Just a friendly reminder, HLLY is a company that started up by manufacturing cheap imitations of better audio gear on the market (LittleDot/Trends/Dayton) and while their newer stuff may seem alright, be aware that their founding products were rip offs. 
 
The new KIAs may be alright automobiles, but at the end of the day they're still KIAs.

I am not sure what you are saying here.  HLLY seems to provide well rated equipment at a decent price.  I am sure that pretty much every piece of audio equipment was built using a stock or existing design. 

 

[Mad Max]

Some people start off like that, apparently.

 

[spartan123]

So what......  Don't buy their products if it bothers you.
 
Quote:

Just a friendly reminder, HLLY is a company that started up by manufacturing cheap imitations of better audio gear on the market (LittleDot/Trends/Dayton) and while their newer stuff may seem alright, be aware that their founding products were rip offs. 
 
The new KIAs may be alright automobiles, but at the end of the day they're still KIAs.

 

[david-gao]

Yes, If you do not like HLLY products, just do not Buy it!
 
We just try our best to make our customer happy, and offer better products!
 
The new DAC based on CS4398 will be available soon!
 
-- david gao

 

[david-gao]

HLLY SMK-III MOD version is avaialble now,  it sell well in China now!
We replace the Main Power Capacitor and the capacitor of Headphone AMP
The Headphone AMP is much better now!
 

 

[erjifan]

Hi David, can you upload some pictures of the mod version at ebay? At least, you should let us know which seller is selling the mod version.
 
Quote:

HLLY SMK-III MOD version is avaialble now,  it sell well in China now!
We replace the Main Power Capacitor and the capacitor of Headphone AMP
The Headphone AMP is much better now!
 

 

 

[mrarroyo]

Hi David, I too would be interested in seeing pictures of the modification. Either by pictures or links to them. Thanks.

 

[david-gao]

MOD Version PCB picture：
 
Use BC caps and AD823 in the Headphone Amp part
 
 

 
Adopt Nichicon Golden Tube Caps for Main Power:

 

[mrarroyo]

Thanks for posting the pictures David. Currently my unit has the caps shown below and I am happy with the sound. Do you recommend I replace the caps I have? Thanks.
 

 

[david-gao]

Dear Miguel, Yes, if you replace the panasonic Caps with Vishay BC caps, the Headphone sound will be better!
Also you can replace the OP275 with OPA2604 or 5532, it will also improve the sound!
 
 

 

[mrarroyo]

So I would need a pair of Vishay 25V, 105C rated caps. What uF value? Thanks.