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08-11-2008, 01:53 AM
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100+ Head-Fi'er
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Join Date: Mar 2007
Location: Southern Ohio, USA
Posts: 273
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I was hooking up the S/PDIF Module this evening and checked for resistance between signal and ground on the S/PDIF_IN once I was done. There was resistance between the two. So, I pulled the wires off and removed the board. Checked again, still had resistance between signal and ground (no solder bridges). It's only on the S/PDIF_IN side.
I "assume" this isn't normal. Any thoughts?
__________________
ArchLinux HTPC :: M-Audio Audiophile 24/96 :: ALSA
DAC: Opus w/Metronome & Ballsie
Amps: Beta22 / 3 Channel :: Millet Max :: SOHA
Heaphones: JVC DX1000 :: Sennheiser HD650 :: Beyerdynamic DT770 :: Sennheiser HD280
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08-11-2008, 01:55 AM
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100+ Head-Fi'er
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Join Date: Mar 2005
Posts: 145
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Quote:
Originally Posted by Ech0
I was hooking up the S/PDIF Module this evening and checked for resistance between signal and ground on the S/PDIF_IN once I was done. There was resistance between the two. So, I pulled the wires off and removed the board. Checked again, still had resistance between signal and ground (no solder bridges). It's only on the S/PDIF_IN side.
I "assume" this isn't normal. Any thoughts?
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This s normal as long as it 75 ohms. 
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08-11-2008, 03:17 AM
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100+ Head-Fi'er
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Join Date: Mar 2007
Location: Southern Ohio, USA
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Indeed it was 75 ohms. 
This puzzles me a bit, but, I'm glad I'm good to go. Thanks for the fast response Russ. I can't wait to finish this baby up.
The packaging was outstanding as I've read before. Someone must be a little obsessive. 
__________________
ArchLinux HTPC :: M-Audio Audiophile 24/96 :: ALSA
DAC: Opus w/Metronome & Ballsie
Amps: Beta22 / 3 Channel :: Millet Max :: SOHA
Heaphones: JVC DX1000 :: Sennheiser HD650 :: Beyerdynamic DT770 :: Sennheiser HD280
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08-11-2008, 04:07 AM
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Headphoneus Supremus
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Join Date: Jul 2007
Location: Cary, NC
Posts: 2,404
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Quote:
Originally Posted by Russ White
There is no ballsie involved. Those are Three IVYs.
The two IVYs on the right are configured for mono DACs (either Opus or COD). They have balanced only outputs.
The IVY on the left is simply doing balanced to single ended conversion. This way you can have SE outputs that are the sum of balanced output at the same level as the balanced output. The best way to get a clean SE signal is to sum the balanced signal.
The text expands on this a bit.
Cheers!
Russ |
Just wondering if all three of these could be powered properly off of one or two LCBPS with one of the recommended Lindberg transformers? (Not along with the DAC too of course)
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08-11-2008, 04:14 AM
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100+ Head-Fi'er
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Join Date: Mar 2005
Posts: 145
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Quote:
Originally Posted by manaox2
Just wondering if all three of these could be powered properly off of one or two LCBPS with one of the recommended Lindberg transformers? (Not along with the DAC too of course)
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Just one LCBPS with one of those dual secondary transformers is just fine for all three. But two would work too.
Cheers!
Russ
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08-11-2008, 04:23 AM
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1000+ Head-Fi'er
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Join Date: Mar 2008
Location: Halifax, NS
Posts: 1,453
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Quote:
Originally Posted by manaox2
Just wondering if all three of these could be powered properly off of one or two LCBPS with one of the recommended Lindberg transformers? (Not along with the DAC too of course)
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Actually, I've been wondering about something similar to this as well......
I was planning to run both 'channels' of an LCDPS from a single 15V 7.5VA secondary winding (one channel VD for Buffalo, one channel OTTO and LEDs). But with losses from two sets of rectifiers and two regulators, I'm wondering whether it will be enough.
So Russ: do you have any approximate figures for current/power draw for OPUS, IVY and Buffalo at the recommended supply voltages?
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08-11-2008, 05:40 AM
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Headphoneus Supremus
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Join Date: Jul 2007
Location: Cary, NC
Posts: 2,404
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Quote:
Originally Posted by Russ White
Just one LCBPS with one of those dual secondary transformers is just fine for all three. But two would work too.
Cheers!
Russ |
Thanks for that, I am considering it when I get ready to purchase the Joshua Tree when it finally comes back into stock.
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08-14-2008, 03:57 AM
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100+ Head-Fi'er
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Join Date: Mar 2007
Location: Southern Ohio, USA
Posts: 273
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Opus up and running....
Many thanks Brian & Russ for this fantastic DAC. It was a fun build and I really like the modules concept for flexibility of parts desired, but, it also made the layout attractive, IMO. Once I got the settngs configured properly the DAC w/my amp combo is dead silent when no music is being sent through. I've only listened to the opus for a short while but the clarity is the first thing I noticed. It was as if my previous DAC muffled the sound. My previous setup struggled on some highs particularly female vocals. Sorry, for the poor word choice I've not had a lot of experience having only listened to a marginal amount of gear.
Anyway, the only issue I had was following the recommended setting for each module I ended up w/static only. I found the answer at the Twisted Pear website (forum). Someone else experienced this issue and Russ suggested changing the OSR setting on the Opus to "+". The manual (version 2.0) recommends leaving this switch open. Though I'd mention it might help someone else.
Setup is as follows: S/PDIF > Metro > Opus > Ballsie
Thanks again guys and I'll post pics tomorrow for anyone interested.
Edit: The static issue was with the Metronome set 192khz output.
__________________
ArchLinux HTPC :: M-Audio Audiophile 24/96 :: ALSA
DAC: Opus w/Metronome & Ballsie
Amps: Beta22 / 3 Channel :: Millet Max :: SOHA
Heaphones: JVC DX1000 :: Sennheiser HD650 :: Beyerdynamic DT770 :: Sennheiser HD280
Last edited by Ech0; 08-14-2008 at 03:31 PM.
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08-18-2008, 06:59 AM
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500+ Head-Fi'er
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Join Date: Jun 2007
Location: In my nice comfortable chair, listening to my Cans
Posts: 552
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hi, i'm newbie in DIY and want to ask something
what's the difference between Ballsie and IVY module?
thanks
__________________
Home: Valab NOS DAC -> Analog OCC IC -> Little Dot MK IV -> AKG K500 / Edifier C3
Portable: Sony A-826 4GB -> Yuin PK1
Wishlist: Beta22, SET Tube Amp
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08-23-2008, 02:47 AM
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Head-Fi'er
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Join Date: Jan 2007
Location: montreal
Posts: 37
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Quote:
Originally Posted by Bozz_Keren
hi, i'm newbie in DIY and want to ask something
what's the difference between Ballsie and IVY module?
thanks
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page 66
laziness is the worst sin
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08-27-2008, 07:56 PM
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500+ Head-Fi'er
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Join Date: Mar 2006
Location: Kansas City, MO
Posts: 985
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I'm trying to recommend the Opus DAC to someone, but the website says all the modules are "Out of Stock". Is that the case?
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08-27-2008, 07:59 PM
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100+ Head-Fi'er
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Join Date: Sep 2006
Location: US, top-right.
Posts: 423
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Quote:
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I'm trying to recommend the Opus DAC to someone, but the website says all the modules are "Out of Stock". Is that the case?
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I am on a bit of a vacation (actually getting ready to sell our house). I will have the site back online in a few days, with most things back in stock.
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Abiding Diax's Rake
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08-31-2008, 06:56 AM
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500+ Head-Fi'er
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Join Date: Jan 2008
Location: Redmond, WA
Posts: 825
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Finished... for real this time... until I get a metronome...
__________________
Headphones: AKG K701 --- Grado SR225 --- B&O A8 --- Atrio M8
Amps: Little Dot MKIII --- AMB M^3 --- AMB Mini^3 --- CMoy/TLE
Sources: Opus --- 3G iPod Nano --- 4G iPod Rockboxed --- Acer Aspire 1
Other: Meier Crossfeed
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08-31-2008, 07:05 AM
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500+ Head-Fi'er
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Join Date: Feb 2007
Location: Bay Area
Posts: 680
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Sweet!
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09-10-2008, 12:16 PM
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Junior Head-Fi'er
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Join Date: Aug 2008
Posts: 4
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Has someone ever tried the Opus DAC combined with a Zapfilter?
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