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USB to SPDIF converters shoot-out : EMU 0404 USB vs. Musiland Monitor 01 USD vs. Teralink-x vs. M2Tech hiFace - Page 101  

post #1501 of 1712
Quote:
Originally Posted by punk_guy182 View Post

I don't know any other.

The only BNC male to BNC male adapter that I could find was on ebay. They are certified for CCTV cameras but I'm not sure their build quality are very good. In fact I'm not even sure if it is worth looking for some ultra high end adapter. Can it improve SQ significantly?


Now that's opening a can of worms. Off to the sound science forum with you, to discuss quantitative measurements and double blind tests!

post #1502 of 1712

@slim.a

 

Any Updates?

 

USG

post #1503 of 1712
Thread Starter 
Quote:
Originally Posted by upstateguy View Post

@slim.a

 

Any Updates?

 

USG


That Evo hiface looks intersting and tempting but I am sticking to jkeny's hiface for now. But still I am curious to hear people's impressions on the EVO model

Also, it seems that M2Tech annouced that they are working on 2 new 32/384 DACs (see here: http://www.m2tech-hiface.com.au/index.php/news). If they isolate the usb from the rest of the DAC it can be very intersting (as long as the clocks can be battery powered ...).

 

post #1504 of 1712


 

Quote:
Originally Posted by jkeny View Post

I will be getting a range of "special" BNC adaptors to test shortly which should improve the sonics of the Hiface yet again BUT there is a limited supply so don't ask me for one. These adaptors use a trick which will work perfectly with the Hiface & will solve a number of problems about cables making it possible to have less regard for the cable length or quality even allowing BNC to RCA without penalty. I will post on my website when I have tested & settled on the correct one in the range.


There is absolutely nothing "special" about them. Why don't you share where you got the idea from, so all your buddies can get it straight from the horse's mouth.

 

Instead of the horse's............

 

(Hint: DIYHiFi.org. Several posters, on several threads. All of which have been made worse by one poster. I won't say who.)

post #1505 of 1712
Quote:
Originally Posted by punk_guy182 View Post

I don't know any other.

The only BNC male to BNC male adapter that I could find was on ebay. They are certified for CCTV cameras but I'm not sure their build quality are very good. In fact I'm not even sure if it is worth looking for some ultra high end adapter. Can it improve SQ significantly?


You haven't looked very hard.

 

http://www.milestek.com/shop/50-ohm-bnc-barrel-male-male.html

 

I have no affiliation with those people. Just did a search, from a known vendor.

 

Now, if you really want 75 ohms, I will have to dig a little harder. I have lots, but can't remember where they came from. Stay tuned.

 

Can't say I never did you a favor. You are welcome.

 

Jocko

post #1506 of 1712

Took longer than I had hoped for:

 

http://www.pasternack.com/product-ADAPTER-75-OHM-BNC-MALE-TO-75-OHM-BNC-MALE-PE9364-72412.html

 

That is 2 favors you guys owe me.

 

Jocko

post #1507 of 1712

 

 

Quote:
There is absolutely nothing "special" about them. Why don't you share where you got the idea from, so all your buddies can get it straight from the horse's mouth.

 

 

Thanks Jocko,

I was waiting until I had tested which one (or combination of attenuators) sounded the best on the output of the Hiface & should one be used at the transport end &/or at the DAC end BUT seeing as you want to field these questions, then go ahead the field is yours.

 

Here's the information guys - Jocko over on DiyHiFi.org, a long time ago, talked about using a T Pad Attenuator to cut down reflections - Joseph K has been using BNC adapters since 2009 which incorporates these T-pad attenuators. You can buy these BNC adapters here http://www.minicircuits.com/products/attenuators_coax_fixed.html

 

Don't ask me which one to use as Jocko seems to want to answer all your questions & I'm happy for him to do so - take it away, Jocko! I'm sure he'll reply here or over here: http://www.diyhifi.org/forums/viewtopic.php?p=43604#p43604 if you want to ask him


Edited by jkeny - 6/17/10 at 2:55pm
post #1508 of 1712

Gee, you actually gave someone credit for something they did. I am amazed.

 

Thank you.

 

No, I don't really want to field the questions. But, it is probably best if someone who really knows what they are talking about does. I nominate one of the other guys at DIYhiFi. Several RF guys over there. Any are more than capable of 'splaining things. I can fill in, if need be.

 

I have bookmarked this thread, so I can drop in and answer questions, if need be.

 

Jocko


Edited by Jocko Homo - 6/17/10 at 3:00pm
post #1509 of 1712

Also me..

 

Ciao, George

post #1510 of 1712

Cool that's great!

 

Jocko, Joseph K, if you want to participate more on this thread, I'm sure you would be very welcome &  stop me talking through my ****. Please feel free to start now - I'm receptive to any corrections!

 

But, Jocko, please start by pointing out who/what I didn't give credit to & I will correct this immediately.


Edited by jkeny - 6/17/10 at 3:08pm
post #1511 of 1712


 

Quote:
Originally Posted by jkeny View Post

 

 

 

 

Thanks Jocko,

I was waiting until I had tested which one (or combination of attenuators) sounded the best on the output of the Hiface & should one be used at the transport end &/or at the DAC end

 

OK, here is where things get sticky.


What works best for you may not be best for the next guy. Yes, even if he has the same transport doo-hickey. How it interacts with the DAC input will make a difference. It has to be looked at as an entire system. Each part will interact with the others, so you can not get an absolute answer, just by looking at one thing in isolation.

 

Now, if you stick a cable in the middle, it really gets messy! You may have to play games with "magic connectors" on both ends.

 

Yes, one option would be to stick a magic connector in between the transport and the DAC. Only limitation is will they line up, without putting mechanical stress on each one.

 

Assumes that you can line up your gear so that it works that way. Solves the problem of no cable, and only one "magic connector" to futz with. Which may take all of the fun out of it.

 

Jocko
 

post #1512 of 1712

Here is a bit more precise link, telling why I think that this "attenuator" trick originating from Jocko is a specially good thing in case of the Hiface driver.

 

http://www.diyhifi.org/forums/viewtopic.php?p=43397#p43397

 

Here I have given more informations, explanations, examples:

 

http://www.diyhifi.org/forums/viewtopic.php?p=43406#p43406

 

Then later on in that thread you can find some more tests as well.

 

Ciao, George


Edited by joseph k - 6/17/10 at 3:20pm
post #1513 of 1712

Can I start the questions by asking 

 

Quote:
which one (or combination of attenuators) works best on the output of the Hiface & should one be used at the transport end &/or at the DAC end
 

Jeez, you guys are fast!

 

I see you already kinda answered this.

 

Let me explain what I understand (& I'm open to being corrected) happens with these attenuators before I ask any more questions.

 

They attenuate the signal & also the reflections on the cable - it's the reflections that we want to reduce to insignificance, if possible! Now if we attenuate the signal too much we fall out of the SPDIF spec & the DAC wil not be able to lock to the signal. We can attenuate the signal coming out of the Hiface because it is high. So there is a point at which we have the max attenuation & still stay with SPDIF spec!

 

My question was getting at what was this optimal attenuation value given the output of Hiface?


Edited by jkeny - 6/17/10 at 3:21pm
post #1514 of 1712
Quote:
Originally Posted by jkeny View Post


But, Jocko, please start by pointing out who/what I didn't give credit to & I will correct this immediately.


Not necessarily you. It is just so common that the majority of DIYers get their ideas from troublemakers, like Phred, run off, foam at the mouth, and pretend it is their "research".

 

If, by "research", you mean reading DIYAudio. Let's face it: that is common practice there.

 

No, I just get tired of guys on one hand whining, and on the other acting like they haven't learned a thing from the folks they love to criticize.

 

Do you have a guilty conscience, hmm............

post #1515 of 1712
Quote:
Originally Posted by jkeny View Post

Can I start the questions by asking 

 


How do I know? I don't have one. You are just going to have to try a whole mess of them.

 

Now, if you want my suggestions on which ones to buy............assuming you have the $.

 

I would get 3 dB, 6 dB, 8 dB. Probably 2 dB, if you can afford them.

 

Which one, on which end? Every application will be different. You can try them, and report back. That would be something I think all can agree would be helpful. Just as long as the guys who read it understand that may not work best for them.

 

Jocko

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