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post #3166 of 6360
Thread Starter 

Try it with toslink anyways. There's a computer/data buffer/DSP thing in there, so transport does tend to be less critical compared to some other DACs.

post #3167 of 6360
Quote:
Originally Posted by purrin View Post
 

Try it with toslink anyways. There's a computer/data buffer/DSP thing in there, so transport does tend to be less critical compared to some other DACs.


Will do. I am going to give it a go tonight when I have some more free time.

post #3168 of 6360
@AustinValentine
Didnt know about the AMB incident, that sounds pretty bad indeed. Maybe he was a jerk afterall ...still no incompetent charlatan. And there's nothin wrong with his devices..especially for the price. Heard one of those small schiit amps once ... didnt have the o2 to compare but thee was nothing special ... just another good small amp, prolly worth the reasonable price.
Quote:
Originally Posted by wahsmoh View Post

Okay moving away now from the discussion of Nwavguy's ODAC and O2.

I just got my Theta DS Pro Progeny v. A shipped to me today. First thing that surprised me was how much it weighed.. very very hefty and unlike most products under $500 you can buy today.

Now.. onto the sound. Can't do it yet until I get my USB - SPDIF converter shipped to me.. I just ordered a Peachtree T1 USB-Coax because I do not plan on using my soundcard's SPDIF/toslink-out, I'd rather have one USB cable and a converter separating me from my music. Also I heard the toslink input was added as an afterthought back in the 90's compared to the coaxial inputs.

Here is the back of it
Processed By eBay with ImageMagick, z1.1.0. ||B2

And part of the front
Processed By eBay with ImageMagick, z1.1.0. ||B2

Processed By eBay with ImageMagick, z1.1.0. ||B2


These are from Ebay, I have only plugged it in to see if it powers up which it does. I just don't want to listen to it yet if I have to listen through the toslink input because I would rather wait than spoil it

Tried quite a long time to get one of those Dacs of yore on ebay EU but the Thetas and Parasounds are very rare and still very expensive around here ... not gonna pay €700-1000 for simple curiosity. Congrats and maybe you can compare it with some current models
Edited by prot - 3/23/15 at 11:50am
post #3169 of 6360
Quote:
Originally Posted by prot View Post

@AustinValentine
Didnt know about the AMB incident, that sounds pretty bad indeed. Maybe he was a jerk afterall ...still no incompetent charlatan. And there's nothin wrong with his devices..especially for the price. Heard one of those small schiit amps once ... didnt have the o2 to compare but thee was nothing special ... just another good small amp, prolly worth the reasonable price.

Tried quite a long time to get one of those Dacs of yore on ebay EU but the Thetas and Parasounds are very rare and still very expensive around here ... not gonna pay €700-1000 for simple curiosity. Congrats and maybe you can compare it with some current models

Do any of these dacs,from the 90's,still have parts available,if needed,or are these  newer models , with warranty??

Correct me,if I'm wrong.

post #3170 of 6360
Quote:
Originally Posted by prot View Post

@austinvelentine
Didnt know about the AMB incident, that sounds pretty bad indeed. Maybe he was a jerk afterall ...still no incompetent charlatan. And there's nothin wrong with his devices..especially for the price.

Tried quite a long time to get one of those Dacs of yore on ebay EU but the Thetas and Parasounds are very rare and still very expensive around here ... not gonna pay €700-1000 for simple curiosity. Congrats and maybe you can compare it with some current models

That's my goal. If I can get to SoCal CanJam 2015 I will compare it with the Gungnir and today's modern DACs.

 

For now though it will be a single-ended shootout between the Bifrost Uber Gen2 USB and DS Pro Progeny A. I think that leads to an interesting match up because the Progeny A was designed as an affordable step-up to Theta DACs but in a single-ended form. The Schiit Bifrost Uber Gen 2 was designed by the same guy and offers the modern advantage of asynchronous USB. The Theta DS Pro Progeny A has two transformers, one for the digital section and one for the analog versus the single transformer of the Bifrost Uber. I think the Bifrost Uber managed to separate these two sections more with the Uber analog stage. I plan on listening to redbook and anything under 20/48khz to keep the sample rates fair in my comparisons.

post #3171 of 6360
Thread Starter 
Quote:
Originally Posted by prot View Post

...still no incompetent charlatan.

 

I'd say borderline. The PCB layout was kind of funky, the pot between the stages was retarded, and the amp failed with its stated design goal of being portable. Charlatan in that he actually convinced a lot of people that he was not only competent, but competent beyond reproach with his D-scope and all.

post #3172 of 6360
Quote:
Originally Posted by mikek200 View Post
 

Do any of these dacs,from the 90's,still have parts available,if needed,or are these  newer models , with warranty??

Correct me,if I'm wrong.

Yes and no. Most of these Theta legacy products can no longer be repaired or maintained through warranty. I have heard of people sending their Sonic Frontiers DACs to the original guy and getting them worked on so yes there are some 90's DACs that are still repaired by the company. What makes them hard to repair I believe are the parts that are no longer manufactured. That means the Theta Digital DS Pro Basic IIIa which uses 4x PCM1704 has a chip that is on a timeline to expiration as they are no longer manufactured and have a limited stock. Also the one that my DAC uses, the Burr Brown PCM67P-k is no longer manufactured.

post #3173 of 6360
Quote:
Originally Posted by wahsmoh View Post
 

Yes and no. Most of these Theta legacy products can no longer be repaired or maintained through warranty. I have heard of people sending their Sonic Frontiers DACs to the original guy and getting them worked on so yes there are some 90's DACs that are still repaired by the company. What makes them hard to repair I believe are the parts that are no longer manufactured. That means the Theta Digital DS Pro Basic IIIa which uses 4x PCM1704 has a chip that is on a timeline to expiration as they are no longer manufactured and have a limited stock. Also the one that my DAC uses, the Burr Brown PCM67P-k is no longer manufactured.

Well,I wish you the best of luck,and I hope you get years of service/enjoyment out of it.I was close to getting one myself,but decided at the last minute, for the Yiggy

 

 

Mike

post #3174 of 6360

Speaking of O2 amps and AMB. What happened to RSA? They used to be very well regarded with their RSA shadow amp and all. Now it seems that they aren't as popular as they used to be. Maybe Schitt Audio or other players like Leckerton or Jdslabs supersede them interms of $/performance?

post #3175 of 6360
Quote:
Originally Posted by purrin View Post

I'd say borderline. The PCB layout was kind of funky, the pot between the stages was retarded, and the amp failed with its stated design goal of being portable. Charlatan in that he actually convinced a lot of people that he was not only competent, but competent beyond reproach with his D-scope and all.

Well he convinced me smily_headphones1.gif. The O2 is portable enough for my needs (hotel room amp), can drive almost any HPs and sounds very good for the price...especially since I only paid ~€100 for a swiss made device on ebay. As about "competent beyond reproach", noone is that good.

Anyway, curious what would you recommend as an alternate. Dac/amp combo or just amp ... under 1k ... able to drive most HPs ... portable or at least semi... sounds clearly better than an iphone or middlerange DAPs like the ibasso-s.

May also be just a DAP. Currently I'm looking at the soundaware esther...apparently will be able to take 1TB of music and has a reasonably powerful amp ... may be my future road jack smily_headphones1.gif
post #3176 of 6360
Quote:
Originally Posted by mikek200 View Post

Do any of these dacs,from the 90's,still have parts available,if needed,or are these  newer models , with warranty??
Correct me,if I'm wrong.

I'm not the right person to ask, I just tried to get one of those. I assume the parts & service situation is quite dare, wouldn't buy one of those as my main device.
post #3177 of 6360
Quote:
Originally Posted by evillamer View Post
 

Speaking of O2 amps and AMB. What happened to RSA? They used to be very well regarded with their RSA shadow amp and all. Now it seems that they aren't as popular as they used to be. Maybe Schitt Audio or other players like Leckerton or Jdslabs supersede them interms of $/performance?

 

RSA products always had a bit of a premium pricing on them, and with increasing competition especially from the cheaper Asian market most of the popular names in portable amps from a couple years back are dwindling.

post #3178 of 6360
Quote:
Originally Posted by prot View Post

Well he convinced me smily_headphones1.gif. The O2 is portable enough for my needs (hotel room amp), can drive almost any HPs and sounds very good for the price...especially since I only paid ~€100 for a swiss made device on ebay. As about "competent beyond reproach", noone is that good.

Anyway, curious what would you recommend as an alternate. Dac/amp combo or just amp ... under 1k ... able to drive most HPs ... portable or at least semi... sounds clearly better than an iphone or middlerange DAPs like the ibasso-s.

May also be just a DAP. Currently I'm looking at the soundaware esther...apparently will be able to take 1TB of music and has a reasonably powerful amp ... may be my future road jack smily_headphones1.gif

 

Try the Leckerton UHA-6S Mk.II. Smaller footprint than O2, truly portable, and power output is only a bit behind, but resolution and everything else should be audibly better due to it having better technicality than the O2.

 

There were some comparison measurements made between the O2 and the Leckerton, even, showing the O2 audibly causing frequency response variations in hard-to-drive IEMs, whereas the Leckerton handles them like a champ. Unfortunately, that website has gone down now.

 

If you need a better DAC than ODAC, I'd say... Geek Out 450.

 

I had an O2 for a while, but when I got my Leckerton in and did a comparison, the O2 went up for sale almost immediately...

post #3179 of 6360

UHA-6S MkII is what made me sell the O2/ODAC unit, even if the Leck's DAC isn't quite as good as the ODAC. Still sounded better overall.

post #3180 of 6360
Quote:
Originally Posted by Bill-P View Post

Try the Leckerton UHA-6S Mk.II. Smaller footprint than O2, truly portable, and power output is only a bit behind, but resolution and everything else should be audibly better due to it having better technicality than the O2.

There were some comparison measurements made between the O2 and the Leckerton, even, showing the O2 audibly causing frequency response variations in hard-to-drive IEMs, whereas the Leckerton handles them like a champ. Unfortunately, that website has gone down now.

If you need a better DAC than ODAC, I'd say... Geek Out 450.

I had an O2 for a while, but when I got my Leckerton in and did a comparison, the O2 went up for sale almost immediately...

Thx for the suggestion, the leckerton did seem perfect up to "usb limited to 16/48" ... thats a bit too little for anno 2015.

The geeks are not that special and they can't drive both IEMs & HPs. Plus I already have a microstreamer + O2 and I'm trying to simplify my life with an upgrade ... too many cables & components to carry right now. I'm thinking either a very powerful DAP like that soundaware, or a serious powerpackage like iDSD Micro. Or just a really good amp fed from the iPhone. Dont know I'm quite lost between all those posibilities ... and open to suggestions.
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