[sygnus21]

Quick question. With the 503, do both balanced and RCA out puts work simultaneously?

I can't say since I'm only using the RCA outs to my speakers.  You can always download the owners manual here: UD-503 DOWNLOADS and get most the answers you're looking for.

 

[music_man]

europe is also 50hz. not sure anything will work other than to replace both transformers, possibly some caps a diode..... not really worth it.
 
a country that has 220v summed on the opposite phases as done in us is easily rewired. i will tell anyone, do not play with electricity unless you are sure you know what you are doing! disaster can result.

 

[sygnus21]

  i will tell anyone, do not play with electricity unless you are sure you know what you are doing! disaster can result.

Exactly.  Not just disaster... A teen died a few years back messing with a PC power supply. We can debate the how's and why's but the bottom line is if you don't know what you're doing and go poking in areas you shouldn't... it could be your last time doing so.

 

[AudioQuality777]

Teac nt-503 Perfectly loses external hard drive 2TB with external power required.

The flash drive also.Teac AVR Remote is handy utility for Android.Like lots of Internet radio stations.Include for the background to listen to music.
  

 

[AudioQuality777]

Hooked up to hard drive, the power is linear.Super!Gathered himself,40 mv noise.The sound changed much.Increased transparency,resolution.Naturally grown!

 

[FlemmingBach]

Today I modded my UD-503 a litlle ...  Why... because I can
 
 
Bottom side of the main PCB:  The black wires are not a mod. It is a ground wire that Teac has added. 

 
I have painted the Caps that the signal passes with a red marker on top. I have parallel coupled 100nF 16V  SMD metal film caps on all these marked with a red dot.  

 
Now my most important Mod, it to replace the (4x)  rather small 100uF 25V caps that Teac has used to decouple VREFL & VREFH on the AK4490.  The Appnote from AKM clearly shows that If the Cap size is increased the THD+N will be lower !!
 
There is plenty of room for larger caps on these places.  I replaced the 100uF 25V with Panasonic FR series 2700uF 25V.  This is a very very low ESR type caps! 
 

 
The four 2700uF 25V Panasonic Caps installed.

Side view of the new Caps mounted.

 
On all the E-Caps that the signal goes through, I found room on the bottom side to parallel couple 100nF 16V Metal film capacitors.

 

The Main PCB in place again with my modifications.

 

 

 
I sounded good before, and now I sounds even better  
 
The cost of this mod is not expensive.
 
Panasonic FR 2700uF 25V:
http://www.mouser.dk/ProductDetail/Panasonic/EEU-FR1E272L/?qs=sGAEpiMZZMtZ1n0r9vR22fJqYs4ddJyTLSiE3SdX3Pc%3d

 

[music_man]

this is good to know. i had seen no where to mod it. thank you for your work.

 

[AudioQuality777]

FlemmingBach
Thank you!To measure can?
What happened as a result fashion!

 

[SkyWalker2]

  you just have to switch the wires from the center tap to the outside tap on the torroids. it is very simple for a tech... i mod almost everything to 220v. just sounds better.

@music_man, have you switched your 501 to 220v? Have you checked is it possible to switch 503 as well?

 

[SkyWalker2]

aQuote:

  Today I modded my UD-503 a litlle ...  Why... because I can

@FlemmingBach
Could you please trace power lines from toroids to ac power switch. Is it possible to reconfigure your 503 (suppose it 100-120volt) to 220-240volts?
 
As for your note mentioning there is only two wires for each toroid. I noticed that as well and it is by the way opposed to 4 power wires per toroid for ud-501. I suspect that in 503 they could switch toroids primary windings themselve in parallel or in serie to get economy on extra windings.
 
To investigate the version of different transformers for different markets. May you please tell what AC version do you have and make a close up photo of toroids label?

 

[FlemmingBach]

@SkyWalker2
 
My UD-503 is a European version, 230Vac, and here are some pics of the transformers. 
It only has one pair of primary wires. 
 
 

 
 

 
Only two wires for Primary! European version has this PCB with a 230V common mode filter, and fuse.

 

 

 

 

 

 

[leeperry]

lotsa technical fluff but 5532 headamp heh http://www.qobuz.com/LU-fr/info/Hi-Res-Guide/Bancs-d-essai/TEAC-UD-503-un-DAC-avec178038

 

[music_man]

on 503 you will have to swap out the torroids, a couple caps and a diode. it looks to me. they are not universal center tapped torroids. so you cannot simply run them form the outside rather than the center unfortunatelt. again, i am going to say do not play with electricity unless you have very high skill with this. you do not need an electricians license but you should certainly know as much as one! this is no joking matter. just do not do this please if you do not understand what to do. if you do, go right ahead.
 
so i am saying my ud503 is already run from the outside and that is all there is. there is no center tap. you will have to replace things. not even worth the cost for this thing. get the eu version! save yourself a lot of trouble even if you do know what you are doing. or use a power cord transfomrer. however i find those just destroy sound.i did not switch either to 220v because it cannot be done easily. the outside tap torroids are cheaper than the center tap ones which is why i am sure they did this. i do run most of my gear like amps on two phase. i feel 220v is much more stable for sound. still us power sucks especially out here. in fact i don't even have power. i have a propane generator. there is no power grid out here. even if there was to run it to my property would cost more than i have. you are talking like millions. i am on 3,000 acres and the building is setback about 2,700 feet from where they would put the drop. however i run my good system on batteries. i mean huge sla batteries and the sound is way beter than i ever hear off of ac power.
 
anyways, long asnwer short. can't be done without replacing parts. not worth it. again, please do not play with electricity if you are not exactly sure what you are doing. i just stress this because you can die or burn down your dwelling. not a joke.

 

[oldson]

guys
i am considering selling my 2 current dacs and buying a 503, have any of you had issues ? and if so what is teac's support like?

 

[AudioQuality777]

Excellent sound and standard recording and dsd.Otlichny, dense, powerful, energetic bas.U I had more than 10 DAC but a quality bass slyshal.nt503 Sound much more expensive than their tseny.Vokal natural, perfectly elastic .Struna guitar. Wide stereo separation kanaly.Dsd included .Super Sound.