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Mini Dac TDA1543 X 4 NOS - Page 53

post #781 of 950
Quote:
Originally Posted by flu_fighter View Post


This is what I have been using for the last 2 years for my transportable rig in tandem with my H140.

 

Usually lasts about a week before I need to recharge.

 

http://www.ebay.com/itm/Portable-12V-6800mAh-Li-ion-Super-Rechargeable-Battery-Pack-/200718455062?pt=US_Batteries&hash=item2ebbc09116#ht_3730wt_931

 



SWEET! Thanks flu_fighter,

 

This is exactly what I was hoping to find.

post #782 of 950

How! Thats really tinny compared to my 12V acid battery.

How do you charge it?

 

 

post #783 of 950


It comes with an adapter that connects to the female dc plug of the battery.

Quote:
Originally Posted by Chefano View Post

How! Thats really tinny compared to my 12V acid battery.

How do you charge it?

 

 



 

post #784 of 950

Whats the charger power,

How long does it take to fully charge the battery?

post #785 of 950
Quote:
Originally Posted by Chefano View Post

Whats the charger power,

How long does it take to fully charge the battery?



Input - 110v-240VAC

Output - 12.6VDC 350ma

 

Depending on capacity, for mine I use the 6800mah one, takes about 4 - 6 hours.

I haven't really timed how long it takes to recharge fully, usually I just let it charge overnight.

 

 

post #786 of 950

This battery pack used in conjunction with the TDA1543 Mini DAC all sounds very reasonable for a portable "component" based ("trans")portable setup...

 

Looks like I'll be picking up a MUSE Mini DAC & batt pack soon enough! Now that I know I can rig a portable H140 SPDIF/TOSLINK OUT > MUSE Mini DAC (w LiPo Batt Back) > Analog Amp, it should be fun fun fun! Especially when I have that chain to compare with the FiiO E17 DAC/Amp I have on pre-order...

 

I guess I'll have to work on my writing skills and shoot for a review. I do have a frame of reference for how an iRiver > DAC/Amp should be like, having owned an iBasso D10 in the past.

post #787 of 950
Quote:
Originally Posted by FLACvest View Post

This battery pack used in conjunction with the TDA1543 Mini DAC all sounds very reasonable for a portable "component" based ("trans")portable setup...

 

Looks like I'll be picking up a MUSE Mini DAC & batt pack soon enough! Now that I know I can rig a portable H140 SPDIF/TOSLINK OUT > MUSE Mini DAC (w LiPo Batt Back) > Analog Amp, it should be fun fun fun! Especially when I have that chain to compare with the FiiO E17 DAC/Amp I have on pre-order...

 

I guess I'll have to work on my writing skills and shoot for a review. I do have a frame of reference for how an iRiver > DAC/Amp should be like, having owned an iBasso D10 in the past.


Just remember not to stack the player or the battery directly on top of the dac. It does get pretty warm which may not be great for the battery as well as the player.

 

post #788 of 950
Quote:
Originally Posted by flu_fighter View Post


Just remember not to stack the player or the battery directly on top of the dac. It does get pretty warm which may not be great for the battery as well as the player.

 



Aww shucks. I was hoping for a brick-stack... that's a tad bit disappointing. Maybe putting the DAC in an enhanced thermal dissipation case would help? i.e. a custom aluminum heatsink-style case... I guess I will have to bite the bullet and just get the components, see how hot they run, and think about heat reduction in the future.  Ideally I would like to put the DAC and Batterey Pack together in a (functional and SAFE) combo housing, at least that is what I originally had in mind.

 

LOL I'm joking here but maybe the DAC needs a Thermos-style Wrap to help it keep the heat down? Boys and their toys... Again, thank you for the advice flu_fighter

post #789 of 950

or just space them with paperclips or somethin similar.

 

as long as there's no thermal conductivity you should have nothing to worry about. 

post #790 of 950
Quote:
Originally Posted by FLACvest View Post



Aww shucks. I was hoping for a brick-stack... that's a tad bit disappointing. Maybe putting the DAC in an enhanced thermal dissipation case would help? i.e. a custom aluminum heatsink-style case... I guess I will have to bite the bullet and just get the components, see how hot they run, and think about heat reduction in the future.  Ideally I would like to put the DAC and Batterey Pack together in a (functional and SAFE) combo housing, at least that is what I originally had in mind.

 

LOL I'm joking here but maybe the DAC needs a Thermos-style Wrap to help it keep the heat down? Boys and their toys... Again, thank you for the advice flu_fighter


I think as long as you have some insulation material between the player and the dac it should be fine. Of all the 12v portable dacs that I have the 4 x TDA1543 dac definitely runs the hottest.

 

I use a cheap IKEA toiletry bag which has compartments to keep the player apart from the dac.

 

 

post #791 of 950
Quote:
Originally Posted by flu_fighter View Post


I think as long as you have some insulation material between the player and the dac it should be fine. Of all the 12v portable dacs that I have the 4 x TDA1543 dac definitely runs the hottest.

 

I use a cheap IKEA toiletry bag which has compartments to keep the player apart from the dac.

 

 



That's probably a mighty practical idea. I dunno the gadget guy in me had just "naturally?" considered transplanting the DAC and Batt into a combo enclosure. But that might not be such a good idea, so... In any case, your way sure is practical. And at least you didn't say it. You know what I mean. Fa**y Pack. EEw! hahahaah!
 

post #792 of 950
Quote:
Originally Posted by Sapientiam View Post

Of course it has roll-off, its NOS with passive I/V. How can it not be -3.2dB @ 20kHz?


Hmm, why and how does NOS illicit roll-off?
 

p.s... why is NOS usually envisioned as more "analog" or "vintage" sounding, if oversampling restores the waveforms to a more natural looking state?

 

i.e. something like this -

 

02_1ms192k.png

post #793 of 950

NOS roll-off is just the most severe form of roll off that will occur with all zero-order-hold functions of DACs, whether OS or NOS. This wikipedia article has the maths : http://en.wikipedia.org/wiki/Zero-order_hold. If you hate math, then skip direct to the final paragraph.cool.gif

post #794 of 950

So the TDA1543 has roll-off or all NOS DAC chips ?  I actually thought the roll-off on the HM-601 was part of the software... since the Teclast T51 previously had the same roll-off, then in a firmware update became linear...

post #795 of 950

Yeah, its all (multi-bit) DAC chips have roll-off. Operating in NOS gives the greatest roll-off, but there's still roll-off at 4X OS (for example) just its lower. Using a digital filter to create the OS means some digital compensation can be used to flatten out the response - as found in the (historic) SAA7220.

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