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USB to SPDIF converters shoot-out : EMU 0404 USB vs. Musiland Monitor 01 USD vs. Teralink-x vs. M2Tech hiFace - Page 93  

post #1381 of 1712


 

Quote:
Originally Posted by slim.a View Post

So here is a thought: who is more affected by placebo: someone who used the unit for months or someone that knew it was going to sound bad before listening to it?

 



Wow, a giant post! 

 

No disrespect intended, but you could have left that statement out.

 

USG

 



 


Edited by upstateguy - 5/23/10 at 4:23pm
post #1382 of 1712


 

Quote:
Originally Posted by jkeny View Post





Yes, great little devices, I agree!.......

 

Sorry to hear it's not user-friendly, slim? Are you using a LiFePO4 battery charger? This can stay plugged in permanently & when the unit is turned off , the batteries are recharged & charger should turn off when full. No need to remember to charge battery. 

 


Is this the recommended charger? 

http://www.e-bikekit.com/shop/index.php?p=product&id=34&parent=0&cvsfa=2054&cvsfe=2&cvsfhu=45424b2d4c50332e3541

 

 

Edit to ask if  you could you please point me toward one.


Edited by upstateguy - 5/23/10 at 4:40pm
post #1383 of 1712
Quote:
Originally Posted by upstateguy View Post


 

 


Is this the recommended charger? 

http://www.e-bikekit.com/shop/index.php?p=product&id=34&parent=0&cvsfa=2054&cvsfe=2&cvsfhu=45424b2d4c50332e3541

 

 

Edit to ask if  you could you please point me toward one.

 


The top two LiFePO4 chargers on this site will work but read the caveat below
 
If your batteries are allowed to deeply discharge it's possible these charges won't recharge them. This would only happen if the Hiface was left turned on for 24 hours or longer.
 

Edited by jkeny - 5/23/10 at 5:29pm
post #1384 of 1712


 

Quote:
Originally Posted by jkeny View Post



 


The top two LiFePO4 chargers on this site will work but read the caveat below
 
If your batteries are allowed to deeply discharge it's possible these charges won't recharge them. This would only happen if the Hiface was left turned on for 24 hours or longer.
 


those look to be almost $100 each, what about this one:  http://www.batteryspace.com/Smart-Charger-0.7-A-for-6.4V-2-cells-LiFePO4-Battery-Pack-100-240VAC.aspx  for around $24?

 

3285.jpg

post #1385 of 1712

You would have to pull the batteries and somehow put them in series to use that charger.   

post #1386 of 1712


 

Quote:
Originally Posted by jkeny View Post



 


The top two LiFePO4 chargers on this site will work but read the caveat below
 
If your batteries are allowed to deeply discharge it's possible these charges won't recharge them. This would only happen if the Hiface was left turned on for 24 hours or longer.
 

So can you please tell us which charger is best suitable for your mod?

I'm looking for something that will recharge the batteries even after the hiface has been turned on for more than 24hours.
 


Edited by punk_guy182 - 5/24/10 at 6:41am
post #1387 of 1712
Thread Starter 
Quote:
Originally Posted by jkeny View Post





Yes, great little devices, I agree!

 

The 'extreme' mod of the Hiface I have tried

- Can't do galvanic isolation 'yet' with existing devices like the ADUM

- I have changed clocks for better, lower jitter ones - not much difference in sound

- I have sent the local DAC clock back to the Hiface in place of one of the existing clocks - yes improvements when using I2S, haven't tried this with SPDIF yet. Some more work to do here though.

 

Sorry to hear it's not user-friendly, slim? Are you using a LiFePO4 battery charger? This can stay plugged in permanently & when the unit is turned off , the batteries are recharged & charger should turn off when full. No need to remember to charge battery. 
 

PS. yes we did have a spat earlier in this thread, didn't we? :)


Hi jkeny,

 

Interesting that better clocks didn't provide a big upgrade in performance like it does with some other devices. It might be that the direct feed from the battery makes the "quality" of the clock less important? Just a guess ...

 

Concerning the charger, I am currently using a universal charger. So I have to remember to unplug it after while to avoid overcharging the batteries. I wouldn't call user-unfriendly but it is not the kind of devices that you just put in your system and forget about it. However, given that it doesn't take more than a few seconds every day, the sonic benefits are worth the hassle in my personal experience. Anyway, I have just to find the right LiFePO4 battery charger for France and it should do the trick for me.


As for the special usb cable you sent me (which requires an external power supply), it seems to work correctly but I haven't done any critical listening yet. For now, I have only SMPS 5V power supplies to try it with. As they probably won't do justice to the concept, I have probably to borrow a 5V linear to test with ...

 

ps: I am glad we got past that :)

post #1388 of 1712

JKeny,  Did you try the Tent Labs XO's ?

 

.

 

Slima,    I think I have an extra budget linear 5V PS I could send you,  but a few people have made the AMB PS and also Shunt supplies in +5V for their Slimdevices ethernet transport which would be better.
 

Quote:
Originally Posted by slim.a View Post




Hi jkeny,

 

Interesting that better clocks didn't provide a big upgrade in performance like it does with some other devices. It might be that the direct feed from the battery makes the "quality" of the clock less important? Just a guess ...

 

As for the special usb cable you sent me (which requires an external power supply), it seems to work correctly but I haven't done any critical listening yet. For now, I have only SMPS 5V power supplies to try it with. As they probably won't do justice to the concept, I have probably to borrow a 5V linear to test with ...

 

ps: I am glad we got past that :)

post #1389 of 1712

I don't know what I'm talking about so sorry if this is a stupid idea :P but is 5v lithium ion battery a possible alternative to a psu?

 

http://cgi.ebay.com/Dual-DC-12V-3800mAh-5V-5800mAh-Lithium-ion-Battery-/220578784104?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item335b852368

post #1390 of 1712
Quote:
Originally Posted by upstateguy View Post


 


those look to be almost $100 each, what about this one:  http://www.batteryspace.com/Smart-Charger-0.7-A-for-6.4V-2-cells-LiFePO4-Battery-Pack-100-240VAC.aspx  for around $24?

 

3285.jpg

The batteryspace people will ship vis US postal service (after persuasion from me - the things I do for you guys :)) so it should be a lot cheaper than $100

 

Wrong voltage on the charger you posted - these batteries are charged in parallel i.e 3.2V 


 

Quote:
Originally Posted by haloxt View Post

I don't know what I'm talking about so sorry if this is a stupid idea :P but is 5v lithium ion battery a possible alternative to a psu?

 

http://cgi.ebay.com/Dual-DC-12V-3800mAh-5V-5800mAh-Lithium-ion-Battery-/220578784104?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item335b852368

That's what I would do!
 

post #1391 of 1712
Quote:
Originally Posted by punk_guy182 View Post


 

So can you please tell us which charger is best suitable for your mod?

I'm looking for something that will recharge the batteries even after the hiface has been turned on for more than 24hours.
 


You don't want to leave it on for this long - it will deeply discharge the batteries & this is not recommended for them. Having said that I know some people who have done this a number of times with their batteries & there is no signs of any detrimental effect - maybe the batteries will only last 10 years instead of 15 years :). At these low currents it probably is insignificant for the battery but this is the advice for them in normal usage (high current draw). If you ever do deeply discharge them & the charger doesn't recognise them, then I would advise just putting an ordinary 3V charger on them to bring them back up to 3.3V. I used as a discarded mobile phone charger for a long time being the DIY cheapskate that I am :) 


Edited by jkeny - 5/24/10 at 7:21am
post #1392 of 1712
Quote:
Originally Posted by slim.a View Post




Hi jkeny,

 

Interesting that better clocks didn't provide a big upgrade in performance like it does with some other devices. It might be that the direct feed from the battery makes the "quality" of the clock less important? Just a guess ...

Here's my take - the clock upgrades that result in an improvement (not all do) is 95% (possibly more) because of better PS handling or supply. This is the first hurdle to be overcome. There are so many other areas that introduce jitter that I wonder how important low jitter clocks are in most of our digital equipment i.e. is the low jitter of the clock simply swamped by the added jitter of the rest of the system?

 

 

Originally Posted by slim.a View Post
Concerning the charger, I am currently using a universal charger. So I have to remember to unplug it after while to avoid overcharging the batteries. I wouldn't call user-unfriendly but it is not the kind of devices that you just put in your system and forget about it. However, given that it doesn't take more than a few seconds every day, the sonic benefits are worth the hassle in my personal experience. Anyway, I have just to find the right LiFePO4 battery charger for France and it should do the trick for me.

 

Yes it should be a plug & forget system!

 

Originally Posted by slim.a View Post
As for the special usb cable you sent me (which requires an external power supply), it seems to work correctly but I haven't done any critical listening yet. For now, I have only SMPS 5V power supplies to try it with. As they probably won't do justice to the concept, I have probably to borrow a 5V linear to test with ...

 

Batteries are good too, as I mentioned to you

 

 

Originally Posted by slim.a View Post
ps: I am glad we got past that :)

 

Yes, we are both mature enough to realise that internet communication is a poor medium & the tone of a post can often be misinterpreted, etc.

post #1393 of 1712

 

Quote:
You don't want to leave it on for this long - it will deeply discharge the batteries & this is not recommended for them. Having said that I know some people who have done this a number of times with their batteries & there is no signs of any detrimental effect - maybe the batteries will only last 10 years instead of 15 years :). At these low currents it probably is insignificant for the battery but this is the advice for them in normal usage (high current draw). If you ever do deeply discharge them & the charger doesn't recognise them, then I would advise just putting an ordinary 3V mobile phone charger on them to bring them back up to 3.3V. This is what I used as a charger for a long time anyway.

 

Alright!

I guess everynight before going to bed I would turn the switch of the mod on to avoid this problem.

My next next step is to find the cheapest charger possible that has the cheapest shipping rate to Canada.


Edited by punk_guy182 - 5/24/10 at 7:22am
post #1394 of 1712
Quote:
Originally Posted by regal View Post

JKeny,  Did you try the Tent Labs XO's ?

 

.......

Nope I didn't try a Tent one as I have better or as good here but I'm interested in your results.
post #1395 of 1712
Quote:
Originally Posted by punk_guy182 View Post

Alright!

I guess everynight before going to bed I would turn the switch of the mod on to avoid this problem.

My next next step is to find the cheapest charger possible that has the cheapest shipping rate to Canada.



No you got it wrong - you don't have to remember anything other than when you are finished playing music through the Hiface turn it off - this is normal practise & nothing extraordinary. However, if you are someone who leaves your devices turned on permanently ........


Edited by jkeny - 5/24/10 at 7:31am
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Head-Fi.org › Forums › Equipment Forums › Dedicated Source Components › USB to SPDIF converters shoot-out : EMU 0404 USB vs. Musiland Monitor 01 USD vs. Teralink-x vs. M2Tech hiFace