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Old 10th February 2010, 08:44 PM   #111
boudy is offline boudy  United States
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Default Four vs Two

Has anyone directly compared the 2xTDA1521 and 4xTDA1521 versions of this DAC that are currently available? Do the additional chips make a worthwhile improvement?

Thanks.

I'd appreciate non-speculative responses.
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Old 11th February 2010, 02:29 PM   #112
jstang is offline jstang  United States
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Boudy,

You should read this post...

Building the ultimate NOS DAC using TDA1541A


I have the NOS4.0 dac. Played around with it running with just 1, 2 , 3, and the 4. Also reclocked it, Linear interpolated it and other wise upgraded it. Even added 4 TDA1541 S1 chips.

10 months ago when I first started with DIY Dacs... I was not sure what I wanted to buy or what to do for that matter...

I googled and found that Ultimate DAC thread above... Really had no clue of which chip or how many... Seeing I don't like soldering if I don't have to...I dropped my money on the NOS4.0 after reading that post.

My 2 Cents : Properly tuned and setup.... 4 will sound better. Especially after the linear interpolation mod the difference will be larger. I am glad I went for the 4 and spent the time on all the mods. Even though at the time I bought it, I really did not understand the benefits.

Is it night and day between 2 & 4 chips? In STOCK FORM not really. You will heard the difference....but not night & day.

For the few extra $ it was well worth it for me. I would not think twice...actually I did think twice and bought a second one. Might upgrade to 8 dac with linear interpolation when I get the time.

jk
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Old 11th February 2010, 03:13 PM   #113
boudy is offline boudy  United States
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Default Mods

I'm only looking to perform minimal mods, I'm not comfortable working with SMD components. So it has to perform well in stock form.

The thread that you refer to has gotten huge and its a pain to find the nuggets of useful information, which happens all too frequently here.
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Old 11th February 2010, 04:25 PM   #114
jstang is offline jstang  United States
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The board is 98% DIP chips and thru hole components.... Very easy to mod.

Short answer... 4 is better than 2.

jk
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Old 13th February 2010, 06:27 AM   #115
boudy is offline boudy  United States
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Default Is this the "Linear Interpolation" mod?

4xtda1541a Nos Dac Project
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Old 10th April 2010, 10:41 AM   #116
zoka959 is offline zoka959  Serbia
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Default Raindrop huiTube Module DIY Kit for DAC

HI FLANCFUSTER,
did you know what is Zout of your R.H.Tube Module DIY Kit for DAC.
I am Very intersted in sonic feedback of it despit your "artifact" problems.
Thanks in advance
Yoran
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Old 10th April 2010, 03:34 PM   #117
jstang is offline jstang  United States
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Quote:
Originally Posted by boudy View Post

Nope, this is.....


Building the ultimate NOS DAC using TDA1541A
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Old 10th April 2010, 08:03 PM   #118
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Quote:
Originally Posted by jstang View Post
I have the NOS4.0 dac. Played around with it running with just 1, 2 , 3, and the 4. Also reclocked it, Linear interpolated it and other wise upgraded it. Even added 4 TDA1541 S1 chips.
There goes the NOS of the window. Sure, all say they like NOS but reality is that the 16bit, 44.1kHz sampling rate NEEDS badly some oversampling to get around that image frequencies and brick filter conundrum - if OS it is done right that is.
Of corse, OS without adding the needed dither/interpolated bits will sound almost as bad as NOS. Or rather a different kind of "bad"

Last edited by SoNic_real_one; 10th April 2010 at 08:06 PM.
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Old 11th April 2010, 04:26 AM   #119
jstang is offline jstang  United States
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still clocking each chip at 44.1KHz.....
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Old 11th April 2010, 12:58 PM   #120
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I'm thinking about buying a newer version of the raindrop_hui TDA1541 based dacs with two TDA's in parallel and some improvements on the layout (decoupling caps very close to the chips), and with HDAM output stage.

Here's a link:
DAC Kit DIR9001+TDA1541A 2.0B OS/NOS with HDAM bei eBay.de: Eléments séparés (endet 15.04.10 14:51:48 MESZ)

Did anybody bought this one and had a listen? I'm really interested in the sound of this unit in STOCK FORM! Because, one can mod this dac, but this will lead to a never ending story. In the end one has to replace nearly ALL the parts on the pcb, and this way it doesn't make any sense to me to buy a completely assembled and ready-to-run dac module.

So, how do these modules sound without any mods?

Thanks a lot!

Martin
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