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Old 18th May 2009, 01:06 AM   #491
legarem is offline legarem  Canada
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Quote:
Originally posted by hoverdonkey


Legarem, I am new to this and so would be grateful if you could explain the reason for raising the cutoff if not using a preamp (I used the formula for 2x100 Ohm with 680pF, giving 1170kHz).

I use an integrated amp (Primaluna ProLogue 2) which I guess, by definition, has preamp built in. I am therefore planning to try your original filter (2x1K res, 470pF cap). Am I heading down the right path?

Thanks
Sorry

I made an error

2 X 100 ohms with 4700 pf

2 X 1k with 470 pf

This gives a cut off frequency of 169 khz
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Old 18th May 2009, 06:14 AM   #492
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legarem are Diditec really bright
for the natural sound what are your choice from best to last
are you going to compare Neutrik NTL1 or Edcore
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Old 18th May 2009, 11:55 AM   #493
legarem is offline legarem  Canada
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Quote:
Originally posted by samoloko
legarem are Diditec really bright
for the natural sound what are your choice from best to last
are you going to compare Neutrik NTL1 or Edcore
As soon as I will receive and try the UTC HA108, i'll give you my results

As written in a previous message, the transformer battle will be between

Lundahl LL1690
Yamaha GA80080 (Tamura)
UTC HA-108
Little Studer uncapsulated (retried with 600 ohms load)

For my taste, I didn't like the digitecs. As they were not mine and were kindly borrowed, this is only what I had and have to write on them.
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Old 18th May 2009, 04:08 PM   #494
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Quote:
As they were not mine and were kindly borrowed, this is only what I had and have to write on them.
No no, please!

I lend them to you because I am interested in your opinion! Don't hesitate to write about your experience here.

We don't have to have the same opinion, isn't it?

Maybe this is later some stuff to discuss about?

Kind regards
Franz
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Old 18th May 2009, 05:54 PM   #495
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Quote:
Originally posted by legarem


Sorry

I made an error

2 X 100 ohms with 4700 pf

2 X 1k with 470 pf

This gives a cut off frequency of 169 khz

Thank you!

Does the 2 x 1K with 470pF filter have any advantage over the 2 x 100R with 4700pF? I understand it will be quieter (less voltage across the primary).

Thanks
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Old 18th May 2009, 06:28 PM   #496
legarem is offline legarem  Canada
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Quote:
Originally posted by hoverdonkey



Thank you!

Does the 2 x 1K with 470pF filter have any advantage over the 2 x 100R with 4700pF? I understand it will be quieter (less voltage across the primary).

Thanks
There's more gain with the 100 ohms resistors . The sound can be mellower with the 1K.

DIY is fun because you can taylor the sound like you want with different parts.

In the upsampling dac, the sound is a little more incicive in upsampling mode but it plays better than in non upsampling mode.

To get rid of this little problem with my system, I used Carbon composition 2 watt Allen Breadly 110 ohms resistors between the dac and the transformers.

I know that these resistors are noisy in some situations but not there. My system has 100db/1w/1m of sensitivity so noise can be a real pain when there's some.
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Old 18th May 2009, 06:34 PM   #497
johnm is offline johnm  United Kingdom
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Franz are you still using 10R resistors (and nothing else) between the DAC and primaries of your Digitecs?

Cheers,

- John
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Old 18th May 2009, 07:45 PM   #498
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Yes, John, 10R resistors.

But why don't you try yourself different values?

Franz
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Old 18th May 2009, 08:19 PM   #499
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Quote:
Originally posted by legarem


DIY is fun because you can taylor the sound like you want with different parts.


I went for 2W Kiwame resisitors, which I read are smooth, so these could play nicely with the upsampling.

I have ordered some different component values for some tweaking. DAC board and Tamuras are already here, so I am looking forward to cooking soon!
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Old 19th May 2009, 12:27 AM   #500
legarem is offline legarem  Canada
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Quote:
Originally posted by hoverdonkey



I went for 2W Kiwame resisitors, which I read are smooth, so these could play nicely with the upsampling.

I have ordered some different component values for some tweaking. DAC board and Tamuras are already here, so I am looking forward to cooking soon!

Load the tams with 600 ohms and they will sing. Right now I can say that for the price
($35 ea) , Tams are really hard to beat.
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