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Old 30th March 2013, 10:00 PM   #101
1audio is offline 1audio  United States
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This is what you get for $2K from Metric Halo: ULN-2

It really does a lot more. However seeing the price for a premium box for audiophiles established I may want to get one going. Audiophiles pay more and never look at specs, so flowery claims really make a difference.

The ARDA chip makes some broad claims but their specs are not a lot better that the AKM (or the TI).
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Old 30th March 2013, 10:02 PM   #102
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There is the cost of design, manufacturing, chassis, etc to factor in. It's difficult to sell something in low volumes and make any money unless the price is high.
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Old 31st March 2013, 12:02 AM   #103
davada is offline davada  Canada
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Quote:
Originally Posted by 1audio View Post
This is what you get for $2K from Metric Halo: ULN-2

It really does a lot more. However seeing the price for a premium box for audiophiles established I may want to get one going. Audiophiles pay more and never look at specs, so flowery claims really make a difference.

The ARDA chip makes some broad claims but their specs are not a lot better that the AKM (or the TI).
Notice that just about ever spec is 'A' weighted.
It's not bad but seems average for today.
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Old 31st March 2013, 12:39 AM   #104
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Quote:
Originally Posted by chris719 View Post
There is the cost of design, manufacturing, chassis, etc to factor in. It's difficult to sell something in low volumes and make any money unless the price is high.
That box for that particular model (the ULN-2) is a standard design. There's absolutely nothing special about the box. You can get a faceplate made for not much money either. The connectors are standard pro stuff. It has maybe two circuit boards in it, tops. Total cost for the actual parts is maybe a few hundred dollars at best. I doubt they invented anything (and thus have no patents on the design), so the design could not have cost very much. To me, it's a total ripoff. So, thank God for people like Davada who are willing to design something incredibly good for not a ton of money.
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Old 31st March 2013, 01:34 AM   #105
RNMarsh is offline RNMarsh  United States
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Quote:
Originally Posted by davada View Post
Notice that just about ever spec is 'A' weighted.
It's not bad but seems average for today.
Very average today... many in the same range. What ever happened to the 24bits = 144dB dynamic range story? Where are the missing dB's? Where did they go?

-Thx-RNMarsh
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Old 13th April 2013, 09:17 PM   #106
gerhard is offline gerhard  Germany
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Has anybody here experience with the AD7760?

Its specs are not a-weighted but absolute, sth. I would really prefer
for measurement purposes. Essentially removing everything below 1KHz
from the noise numbers seems kinda unfair. If there is 1/f I would like to see it.

< http://www.analog.com/static/importe...ets/AD7760.pdf >

<Digi-Key Part Search >

A-weighting - Wikipedia, the free encyclopedia
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Old 13th April 2013, 09:35 PM   #107
gerhard is offline gerhard  Germany
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Quote:
Originally Posted by RNMarsh View Post
Very average today... many in the same range. What ever happened to the 24bits = 144dB dynamic range story? Where are t
Wasn't there an app note for the BB ADS1210 with the title
"How to get 20 bits from your 24 bit ADC" or sth. like that?

Gerhard
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Last edited by gerhard; 13th April 2013 at 09:38 PM.
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Old 17th April 2013, 06:09 AM   #108
RNMarsh is offline RNMarsh  United States
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Are we close to design? What needs to be sorted out still?

-RNM
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Old 23rd May 2013, 02:58 PM   #109
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Here is an article that may be helpful in designing this project:
Understanding How Amplifier Noise Contributes to Total Noise in ADC Signal Chains
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