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Mini Dac TDA1543 X 4 NOS - Page 9

post #121 of 948
Thread Starter 
Quote:
Originally Posted by ardilla View Post

I have detected another strange thing about my Muse unit. 

 

On a specific piano track (Olga Konkova - Album: My Voice - Track3: I Could) - there was an occasional slight "broken speaker"-sound some specific places in the song. I tried with my other headset, same thing same place. Then I switched to my NaimDac - no "broken speaker"-sound! How can this be?? The muse sounds flawless and beautiful otherwise (when it works - but now it mostly does).

 

If another Muse mini dac owner (SPWild?:-) would care to try out this specific track - pm me your mail and I'll send the mp3. 


Yeah I know exactly what you mean.  I have two possible theories as to why sometimes some tracks can sound "distorted" in some sections when other Dacs it doesn't seem to be there.

 

Either other Dacs have the advantage of oversampling averaging being able to extract a more accurate waveform from a poorly recorded digital stream...which means that the NOS dacs are actually more ruthless with poor recordings because it doesn't utilise any form of averaging or error correction or compensation...nothing...bits go in, waves come out with the most direct conversion.  I don' rule this out because on the best of recordings there seems to be no problems and problems only seem to be audible on less than perfect recordings, that is most recordings period.

 

The second theory is this may well be the distortion attribute of NOS that can be measured and observed.  This cannot be ruled out, but seeing how NOS sounds so gorgeous, I don't want to believe this...and even if this were true...neither me nor you have heard anything other than the cheapest NOS dac possible.  Would these issues be heard on the Zanden NOS dacs for instance?  In the end of the day, the saving grace is the fact this thing can teach a thing or two and educate for merely 60 bucks.

 

Let me know if you want me to still listen to this track, I can compare this to my other DACs no worries.

post #122 of 948

Sounds plausible. Still - would be nice if you tested it out - I'll mail you the track if you send pm. Would be interesting to see if it is the same with your set up and how your other dacs perform :-) 

 

Anybody else with nos dacs are also welcome to join in! Just pm me :-)

post #123 of 948
Quote:
Originally Posted by ardilla View Post

Sounds plausible. Still - would be nice if you tested it out - I'll mail you the track if you send pm. Would be interesting to see if it is the same with your set up and how your other dacs perform :-) 

 

Anybody else with nos dacs are also welcome to join in! Just pm me :-)

 

I used to own a Valab (8xTDA1543) and I too noticed some kind of distortion during high dynamic peaks. The Havana I'm using now (NOS with PCM56P) has a quite different sound signature, and I can't hear any of those distortion.

post #124 of 948

on the I out DAC that is using passive I/V conversion using just resistor, sometimes too high resistor would distort the sound (the sine wave is broken and cut at the peak)... that is because there is not enough current supply to be converted into voltage....

 

try reduce the I/V conversion resistor with the smaller value... (in the case of MUSE with 4 chips, if all the chips are paralleled with just one resistor, then you only need to change two units: one on R channel and one on L channel. But if each of the chip output has its own resistor, then you need to change 8 units of them)... usually help reduce the distortion... but the consequence is the output voltage will be lower and thus the next active gain (.i.e. the amplifier need to have more gain or we have to cranck more the pot to get louder sound...)

 

post #125 of 948
Thread Starter 
Quote:
Originally Posted by ardilla View Post

Sounds plausible. Still - would be nice if you tested it out - I'll mail you the track if you send pm. Would be interesting to see if it is the same with your set up and how your other dacs perform :-) 

 

Anybody else with nos dacs are also welcome to join in! Just pm me :-)



My LCD2s are out on loan and will get it back in a weeks time, I will PM you then and I would like to hear this.


 

Quote:
Originally Posted by dw1narso View Post

on the I out DAC that is using passive I/V conversion using just resistor, sometimes too high resistor would distort the sound (the sine wave is broken and cut at the peak)... that is because there is not enough current supply to be converted into voltage....

 

try reduce the I/V conversion resistor with the smaller value... (in the case of MUSE with 4 chips, if all the chips are paralleled with just one resistor, then you only need to change two units: one on R channel and one on L channel. But if each of the chip output has its own resistor, then you need to change 8 units of them)... usually help reduce the distortion... but the consequence is the output voltage will be lower and thus the next active gain (.i.e. the amplifier need to have more gain or we have to cranck more the pot to get louder sound...)

 


The ouput level is about 2 V I believe, as it isn't soft at all.  I'll try some resistor values, I think I am willing to drop the output to 1.5 v if it eliminates all forms of distortions...it should be well worthwhile.

post #126 of 948
Thread Starter 
Quote:
Originally Posted by realmassy View Post



Quote:
Originally Posted by ardilla View Post

Sounds plausible. Still - would be nice if you tested it out - I'll mail you the track if you send pm. Would be interesting to see if it is the same with your set up and how your other dacs perform :-) 

 

Anybody else with nos dacs are also welcome to join in! Just pm me :-)

 

I used to own a Valab (8xTDA1543) and I too noticed some kind of distortion during high dynamic peaks. The Havana I'm using now (NOS with PCM56P) has a quite different sound signature, and I can't hear any of those distortion.



Hey how is the Havana different to the Valab?  I imagine the Muse should be similar to the Valab.  Let us know, as I am curios about both Havana and Chameleon.

post #127 of 948


 

Quote:
Originally Posted by SP Wild View Post

Hey how is the Havana different to the Valab?  I imagine the Muse should be similar to the Valab.  Let us know, as I am curios about both Havana and Chameleon.

The Valab has faster transients, an intimate presentation and has (or gives the illusion of) better detail.

The Havana sounds more similar to my old Audio-GD Ref.5, being smoother and relaxed, with a deeper stage.

It's not warm, the Ref.5 sounded darker to my ears. It has extremely better control on top and low end and a fantastic timbre, probably the best strings I've heard so far. 

The Valab seems to be faster probably because of the Havana's harmonic richness.

I'm not entirely happy about the piano though, which sounds nasal and distant compared to the Valab, less percussive.

I'm still using the stock tube, and the Havana is said to be very responsive to tube rolling.

 

With small ensemble and piano music (classical and jazz) I probably prefer the Valab's raw attitude, which makes me "feel" the instrument being played, but with large orchestra the Havana sounds cleaner, percussions and cello are not bloated and top end is not strident. I'd be curious to listen to the Havana with speaker.

 

Overall, Valab and Havana have few things in common, apart from being NOS. So far the Audio Note 2.1 that I listened to a few months ago is still superior to every source I tried...but it's too expensive. I guess I'll stick with the Havana for a long time :-)


 

post #128 of 948

Update: My muse mini dac is now officially EDIT: DEAD. It won't recognize incoming signals properly, it seems. The "unlock" LED is of even when there is no input. Anyway - the ebay seller says he can repair/replace it. 

 

But I still think this is a fabolous sounding dac.

post #129 of 948
Thread Starter 
Quote:
Originally Posted by ardilla View Post

Update: My muse mini dac is now officially. It won't recognize incoming signals properly, it seems. The "unlock" LED is of even when there is no input. Anyway - the ebay seller says he can repair/replace it. 

 

But I still think this is a fabolous sounding dac.



Cool man.  I'm still in the NOS game!  I finally paired the Muse to the Phoenix...and using the HD650s balanced...hahah, wow.  There is something the Muse can do that no other dac in my collection can do.  It has something to do with the midrange...it's warm and natural, without resorting to bass emphasis...I have always found that warmth is equated to good bass...more bass equals warmers.  The Muse has excellent bass tightness and punch...but just a smidgeon less louder than the Bryston or Reference 7.  But yet, its midrange is so smooth and warm...this is a revelation to me and I think is a key to why it sounds so unique.  Simply put it's second to none in midrange magic.

 

Was it the Naim DAC with 4 PCM1704 dac chips that is in your collection?  How does this stack up to the Muse?  I still like the Reference 7 a lot because of its soundstage, imaging and separation...its tonality is very good and offers a nice preview of that NOS magic in the midrange...but its PSU, dynamics, power and precision with blackest of background is really phenomenal...with zero "digititis".  The Bryston mated to the Phoenix with balanced XLRS was a huge improvement over SE to the Lehmann, my guess is that the Bryston works properly balanced as only half its output is used single ended.  Its tonality is finally "acceptable" (but I can definitely how some will prefer the "younger" female vocals as presented by the BDA-1)...but ultimately still falls behind R2R designs...albeit not far behind at all with the Phoenix balanced...but the there is no denying Audio GDs monster PSU outclasses all in matters PSU related.  However...I still can't believe the Muse is simply the best midrange, a league on its own in fact.  I heard no distortions with the HD650s.

 

I am definitely going to open the Reference 7  to flip the NOS mode switch...perhaps a NOS dac with a monster PSU will be amazing? (one reason I purchased the Reference 7 was NOS possibilities...heheh! wink_face.gif)

post #130 of 948

http://www.tonepublications.com/blog/the-rega-dac-is-here/

http://www.rega.co.uk/index2.htm

 

REGA cd players has got a reputation for smooth and organic sound. Something for the NOS-crowd, even if it is not a NOS,  I believe - but fwir they kept it simpler than many? 

post #131 of 948

SP Wild,

 

Does the fantastic midrange of the Muse proceed from the NOS mode or does it proceed from the TDA 1543 ?

 

The Virtue Audio Piano is a cd player that uses TDA 1543 but it is not NOS, it upsamples to 176.4, and it is described as natural and warm.

 

Here is a review :

 

http://www.stereomojo.com/Virtue%20Audio%20PianoM1%20Cd%20Player/VirtueAudioPianoCDPlayer.htm

 

In the review, they said the chip is TDA 1542, but it is a mistake, on Virtue Audio website they say they uses TDA 1543. In this review, you can read : "It sounds much more analog with a midrange sweetness and fullness as well as a very robust bass that one might hear with an analog source; possibly a combination of a good tube preamp driving a high-quality solid state power amplifier. In short, unusually musical at this price or any price."

 

The price is 699 USD. Virtue Audio is going to make a Dac this year. Very interesting.

 

Pascal. 

post #132 of 948
Thread Starter 
Quote:
Originally Posted by pasgod View Post

SP Wild,

 

Does the fantastic midrange of the Muse proceed from the NOS mode or does it proceed from the TDA 1543 ?

 

The Virtue Audio Piano is a cd player that uses TDA 1543 but it is not NOS, it upsamples to 176.4, and it is described as natural and warm.

 

Here is a review :

 

http://www.stereomojo.com/Virtue%20Audio%20PianoM1%20Cd%20Player/VirtueAudioPianoCDPlayer.htm

 

In the review, they said the chip is TDA 1542, but it is a mistake, on Virtue Audio website they say they uses TDA 1543. In this review, you can read : "It sounds much more analog with a midrange sweetness and fullness as well as a very robust bass that one might hear with an analog source; possibly a combination of a good tube preamp driving a high-quality solid state power amplifier. In short, unusually musical at this price or any price."

 

The price is 699 USD. Virtue Audio is going to make a Dac this year. Very interesting.

 

Pascal. 



I think the fantastic midrange of the Muse is attributed to a R2R step ladder, sign-maginitude DA conversion technique.  That because of a lack of a high frequency switching modulator is more able to preserve absolute channel phase and minimise phase distortions that manifests in a leaner midrange and less warmth...as can be observed when hearing two channels out of phase.

post #133 of 948

What is the size of plug in wallwart power supply for Muse mini ? I need to know because I want to buy better power-supply .Thanks

post #134 of 948

Think it's a 2.1X5.5mm plug.( I measured mine looks very much like this:)  EF-DC-2155BG1.gif
 

Quote:
Originally Posted by viatraco View Post

What is the size of plug in wallwart power supply for Muse mini ? I need to know because I want to buy better power-supply .Thanks

post #135 of 948

Thank you ardilla.

Will you recommend me any better power supply for muse under 20 Euro (30 $) from ebay ?

Better will be 1,5A instead 1A or doesn't matter ?


Edited by viatraco - 1/24/11 at 4:00pm
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