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Post by wizardofoz on Nov 13, 2010 23:47:00 GMT -5
Me too units arriving 24/11 and shipping out thereafter so waiting for my pay pal invoice to come. Using my umc$ too
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Post by kenzo on Nov 22, 2010 11:55:11 GMT -5
Another spec I personally have found is important - and makes a very noticeable diference in sound quality on *some* tracks - is commonly referred to as "headroom".
I have found that it is not all that rare for certain tracks to exceed 0 db. This can happen if the signal is recorded over 0 db, AND even if during the mastering the 0db limit was NOT exceeded.
It turns out that the interpolation/conversion process can result in analog outputs that exceeds 0 db even if the recorded digitial values do not.
Many many DACS cannot handle a signal over 0 db, and will clip with very unpleasant results- harsh crackling, or less obtrusive "graininess" and harshness. This can occur at any frequence of course since it is a function of amplitude, not frequency.
Some DACS however can handle such signals without distortion! Either by reducing all signals digitally by -1db or by having anaolog stages that have adequate headroom.
Can anyone comment on the XDA 1 in this regard?
Of course I will test the DAC with some tracks that have this issue, but it would be nice to know beforehand to avoid the risk of a return.
thanks
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Post by Topend on Nov 22, 2010 13:05:16 GMT -5
Another spec I personally have found is important - and makes a very noticeable diference in sound quality on *some* tracks - is commonly referred to as "headroom". I have found that it is not all that rare for certain tracks to exceed 0 db. This can happen if the signal is recorded over 0 db, AND even if during the mastering the 0db limit was NOT exceeded. It turns out that the interpolation/conversion process can result in analog outputs that exceeds 0 db even if the recorded digitial values do not. Many many DACS cannot handle a signal over 0 db, and will clip with very unpleasant results- harsh crackling, or less obtrusive "graininess" and harshness. This can occur at any frequence of course since it is a function of amplitude, not frequency. Some DACS however can handle such signals without distortion! Either by reducing all signals digitally by -1db or by having anaolog stages that have adequate headroom. Can anyone comment on the XDA 1 in this regard? Of course I will test the DAC with some tracks that have this issue, but it would be nice to know beforehand to avoid the risk of a return. thanks How could anyone know? There are not any out there yet? You may have to wait a little longer for an answer. Dave. |
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Post by kenzo on Nov 22, 2010 23:42:46 GMT -5
Well not meaning to sound flippant, but the same way we know all the other specs:
the manufacturer tells us...
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Post by Topend on Nov 23, 2010 0:16:42 GMT -5
Well not meaning to sound flippant, but the same way we know all the other specs: the manufacturer tells us... Maybe an email to Emotiva is in order. Unless Lonnie reads this I don't think you will get an answer soon. Dave. |
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MikeWI
Emo VIPs 
DC-1, ERC-1, USP-1, UPA-2, Sub 10, Emotiva 4S
Posts: 346
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Post by MikeWI on Dec 17, 2010 18:56:39 GMT -5
'scuse my ignorance, but: I thought the AD1955 was Analog Devices, not Burr Brown (TI). Has there been more "consolidation" in the industry? Only you (and another person on another forum) have caught this. www.chasehometheater.com/forum/showpost.php?p=65148&postcount=65This appears to be a typo. Product info: Burr Brown makes the OPA2134 AD1955 is not made by Burr Brown Mike |
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gonk
Minor Hero
Posts: 85
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Post by gonk on Dec 18, 2010 9:29:42 GMT -5
You beat me to it, Mike - I was just headed over here to ask about this.
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MikeWI
Emo VIPs
DC-1, ERC-1, USP-1, UPA-2, Sub 10, Emotiva 4S
Posts: 346
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Post by MikeWI on Dec 18, 2010 9:48:55 GMT -5
You beat me to it, Mike - I was just headed over here to ask about this. I used your pseudonym "and another person".  Mike |
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ddhd
Minor Hero
Posts: 21
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Post by ddhd on Dec 19, 2010 11:37:28 GMT -5
I'm kind of bummed out on this product. I've been waiting for this unit for awhile and now that it can out it seems to fall a bit short.
The display displays what
Volume only?
Why not input bit/rez values
Why not HDCD signal indicator
Why not pass apple digital signal
Why not firewire support
Although I still may purchase this product because of it low cost, it really comes up short of what this device was designed for or at least what it could have achieved.
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cawgijoe
Emo VIPs
"When you come to a fork in the road, take it." - Yogi Berra
Posts: 5,033
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Post by cawgijoe on Dec 19, 2010 12:33:11 GMT -5
I'm not bummed at all.
It's a great DAC for the price.
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Post by sharkman on Dec 19, 2010 12:58:57 GMT -5
I'm kind of bummed out on this product. I've been waiting for this unit for awhile and now that it can out it seems to fall a bit short. The display displays what Volume only? Why not input bit/rez values Why not HDCD signal indicator Why not pass apple digital signal Why not firewire support Although I still may purchase this product because of it low cost, it really comes up short of what this device was designed for or at least what it could have achieved. Which DACs on the market do the above and at what price? |
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ddhd
Minor Hero
Posts: 21
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Post by ddhd on Dec 21, 2010 15:04:36 GMT -5
I don't understand what another dac in the market place has to do with Emotiva product?
The comments were direct towads the XDA-1, which was delveloped from scratch and has what seems to be the ability through it's display screen to output information such as volume. Why not exploit that with additional information that very well might be useful?
Let me put it another way. What's the need for a display screen if it's SOLE function is to display a number? Why not remove the display screen completely? Does one need a numeric display to adjust volume?
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Post by jannick on Dec 21, 2010 18:50:56 GMT -5
I for one think its nice to with a volume indicator of sorts. With large volume difference between different tracks, it sorta makes you alert that "this could hurt on a high volume track".
Regarding the input bit/rez values, are those even "available" to emotiva? If the DAC itself does all the input detection and decoding, then there might not even be a way for emotiva to get the hands on this information without adding extra chips for this sole purpose. In any case, it would probably need additional data lines to the front panel and chip or software to interpret and display this. Not sure most customers would be interested in paying for this.
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Erwin.BE
Emo VIPs
It's the room, stupid!
Posts: 2,269
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Post by Erwin.BE on Dec 21, 2010 19:59:32 GMT -5
Here's what another company gives you for similar money: www.arcam.co.uk/products,solo,DACs,rDac.htm Pro:
asynch USB, which is by other companies claimed to be pointless in all but "money no object" DAC's.
Con:
No milled remote
No remote at all
No volume control at all
No display at all
No XLR output
Only three inputs in total, one type each
Only half rack width
About the FireWire you mentioned: only Apple computers have these outputs. It's tipical for some pro gear, where Apple is indeed standing strong (also watch which laptop electro bands are using, often a MacBook: Human League, Kelis...). I believe FireWire is abolutely the best though, because Jitter is eliminated because the source's clock is slaved to the DAC with FireWire. But even then, my Weiss DAC2 sounds about the same to me with the coax from the ERC-1 as the Mac via FireWire IMO, $299 is almost giving it away, for what you get. |
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