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Abbingdon Music Research DP-777 Thread - Page 7

post #91 of 341

A user in Aus has recently had the 777 upgraded - have a read of the impressions here

 

Greed - are you using a PC / MAC or CD transport as a source to your DAC?

post #92 of 341
Thread Starter 
Thanks for the heads up, Gavtorn! Sounds great to be able to improve the already lovely sound smily_headphones1.gif
post #93 of 341

Where did you send the amr to upgrade it ? How it costs ?

post #94 of 341

I agree with the last poster that said this:

 

"it maintains the relaxed easy-to-listen-to analog quality and superb mid-range tonality of the original (standard?) DP-777."

 

I don't see how they improve this.  But if they can WOW..  The bass can use some impact - that's all I've noticed thus far, everything else seems pretty darn good.

post #95 of 341
Thread Starter 
Fully agree with you, Preproman. The superb tonality and presentation already makes me think that the singer is right in front of me singing. Not sure how they can improve on that. Anyway, since the upgrade seems to improve the DAC further in all areas, I will be more than happy to jump on it if it is made available to my current set.
Edited by froger - 12/14/13 at 5:54am
post #96 of 341
Quote:
Originally Posted by gavtorn View Post
 

A user in Aus has recently had the 777 upgraded - have a read of the impressions here

 

Greed - are you using a PC / MAC or CD transport as a source to your DAC?

 
I'm using my desktop computer with this rig. Thinking about picking up the iUSB to clean up any additional noise from the port. I'm also really interested in this upgrade, but I'm hoping shipping would only need to go to our local US dealer. Depending on the price, I might be able to due without this DAC for awhile...
post #97 of 341
Quote:
Originally Posted by Greed View Post
I'm using my desktop computer with this rig. Thinking about picking up the iUSB to clean up any additional noise from the port. I'm also really interested in this upgrade, but I'm hoping shipping would only need to go to our local US dealer. Depending on the price, I might be able to due without this DAC for awhile...

A few friends and myself have done a lot of experimenting with PC audio in the past few years.  The iUSB is good as is the gemini cable but there are better solutions out there, although not as straight forward.. a lot of it depends on your cash situation as well!

 

The issue with the iUSB is that it still uses the USB port of the PC.  Obviously most USB ports weren't designed for audio!

 

My recommendation is buying a PPAStudio USB card powering it from well regulated 5v linear power supply (such as teddy pardo etc)  This was a huge step forward for my friends.  I use an Adnaco s3 usb port with a hq DIY 5v PSU - but only as I bought it before the PPAStudio card was released.  A high quality PSU is needed for either of these cards to shine.  You can still use an iusb after this for more filtering however you are going to get more from the ppa.

 

I have tested the Gemini USB cable vs. the Revelation Audio Labs dual conduit USB cable on my rig back to back - the RAL cable sounded better to my ears.  Other friends have told me that it beats cables up to $2k - another option is the lightspeed harmonic USB although it costs a lot more than the RAL.

 

A friend is using a PICO PSU to power his PC it replaces a standard ATX PC PSU and lets you use a DC input from a laptop style power brick to power the computer.  He recently replaced the power brick with a hq PSU and has told me it's a big SQ upgrade, so this is next on my list to try.

 

At first I was skeptical about all the power tweaks but once I tried a good PSU powering the USB port I haven't looked back!

 

Also you may want to check out a good software player like mqn or jplay (if you haven't already) and if you have a dedicated music pc - try using windows 2012 + "AudioPhil's 2012 Server optimiser" - my friends were all very happy at the level of improvement they got from the software upgrades.

 

All the things mention above have bought good improvements to my rig, and will help you get the best sq out of your dp-777.

 

cheers,

 

gav.

post #98 of 341

Another point to mention is that all these upgrades + recommendations change really quickly as PC based audio tech seems to be constantly evoling.  the jplay forum has a lot of good, up to the minute info on tweaking pc's for audio.. it gets hard to stay across it all :)

post #99 of 341
Quote:
Originally Posted by gavtorn View Post
 

A few friends and myself have done a lot of experimenting with PC audio in the past few years.  The iUSB is good as is the gemini cable but there are better solutions out there, although not as straight forward.. a lot of it depends on your cash situation as well!

 

The issue with the iUSB is that it still uses the USB port of the PC.  Obviously most USB ports weren't designed for audio!

 

My recommendation is buying a PPAStudio USB card powering it from well regulated 5v linear power supply (such as teddy pardo etc)  This was a huge step forward for my friends.  I use an Adnaco s3 usb port with a hq DIY 5v PSU - but only as I bought it before the PPAStudio card was released.  A high quality PSU is needed for either of these cards to shine.  You can still use an iusb after this for more filtering however you are going to get more from the ppa.

 

I have tested the Gemini USB cable vs. the Revelation Audio Labs dual conduit USB cable on my rig back to back - the RAL cable sounded better to my ears.  Other friends have told me that it beats cables up to $2k - another option is the lightspeed harmonic USB although it costs a lot more than the RAL.

 

A friend is using a PICO PSU to power his PC it replaces a standard ATX PC PSU and lets you use a DC input from a laptop style power brick to power the computer.  He recently replaced the power brick with a hq PSU and has told me it's a big SQ upgrade, so this is next on my list to try.

 

At first I was skeptical about all the power tweaks but once I tried a good PSU powering the USB port I haven't looked back!

 

Also you may want to check out a good software player like mqn or jplay (if you haven't already) and if you have a dedicated music pc - try using windows 2012 + "AudioPhil's 2012 Server optimiser" - my friends were all very happy at the level of improvement they got from the software upgrades.

 

All the things mention above have bought good improvements to my rig, and will help you get the best sq out of your dp-777.

 

cheers,

 

gav.

 

Thanks Gav, will check this stuff out. To be honest, from what I understand the noise and jitter can both be reduced from either end. If that is the case, that would mean that even though I'm using a standard usb port, the AMR and the iUSB together should eliminate most of that at the other end. Of course I do understand the cleaner the signal throughout the entire the chain the better, but sometimes these changes aren't even audible and if so cost half or more than half of what the actual DAC costs. A 5V linear PS shouldn't be a problem. Those can be DIY'd cheap for $30. 

post #100 of 341

The 5v PSU's we had made up cost around $150 just for parts - just because it's a linear PSU doesn't mean it will be amazing, there are cheap ones out there as well - like the teradac psu that my mate sold after having for 2 days because it showed no difference to a wall wart.

 

 

This is a pic of my mate's PC server setup.  The black box on the back left is a 12v regulated PSU (to power his PC) and the one next to it is a 5v to run the PPA USB card in the server, plus, it has a USB port to supply power (using the gemini cable) to his Sonicweld Diverter.

 

He tells me that the 5v USB out from the PSU is cleaner than the power out from the iusb, but he keeps the iusb there for the additional filtering of the data.

 

This is connected to a audio-gd ref 7 - Burson Soloist and HD800's.. it sounds very, very nice :)

 

Cheers,

 

gav.

post #101 of 341

Where did you send the amr to upgrade it ? How it costs ?

post #102 of 341
Quote:
Originally Posted by gavtorn View Post
 

The 5v PSU's we had made up cost around $150 just for parts - just because it's a linear PSU doesn't mean it will be amazing, there are cheap ones out there as well - like the teradac psu that my mate sold after having for 2 days because it showed no difference to a wall wart.

 

 

This is a pic of my mate's PC server setup.  The black box on the back left is a 12v regulated PSU (to power his PC) and the one next to it is a 5v to run the PPA USB card in the server, plus, it has a USB port to supply power (using the gemini cable) to his Sonicweld Diverter.

 

He tells me that the 5v USB out from the PSU is cleaner than the power out from the iusb, but he keeps the iusb there for the additional filtering of the data.

 

This is connected to a audio-gd ref 7 - Burson Soloist and HD800's.. it sounds very, very nice :)

 

Cheers,

 

gav.

Very nice setup your friend has Gav. I have been interested in getting cleaner power to my music PC. I am currently using the very cheap PSU that came with mini-itx case! Do you know if that Pico PSU you mentioned can also power both hard drives and motherboard? Is there other worthy solutions to get rid of this cheap PSU on my computer? Thanks in advance :)

post #103 of 341
Quote:
Originally Posted by brunk View Post
 

Very nice setup your friend has Gav. I have been interested in getting cleaner power to my music PC. I am currently using the very cheap PSU that came with mini-itx case! Do you know if that Pico PSU you mentioned can also power both hard drives and motherboard? Is there other worthy solutions to get rid of this cheap PSU on my computer? Thanks in advance :)

Hi Brunk,

 

It depends on your budget and pc requirements.  The Pico will work with most power friendly PC's and will power an ssd - but isn't designed for gaming rigs with high end graphics etc.  My friends system (above) is using a low power Intel cpu, ssd, fanless, no external graphics etc.  Best to check with the PICO manufacturer on what it supports.  For a music server I would recommend the Pico powered by a linear PSU (as above)

 

The problem with the pico is that once the power enters, it uses digital voltage regulation to supply the 3 different ATX voltages to the motherboard.   A linear supply to the Pico will bring benefits however you can still go further.

 

If you have more money check out the Core Linear ATX PSU. This provides full linear power to the PC.  There are some other brands that provide a similar setup for a similar price.  I'd rather invest that sort of cash in some other gear - or a holiday :)

 

cheers,

 

gav.

post #104 of 341
Quote:
Originally Posted by gavtorn View Post
 

Hi Brunk,

 

It depends on your budget and pc requirements.  The Pico will work with most power friendly PC's and will power an ssd - but isn't designed for gaming rigs with high end graphics etc.  My friends system (above) is using a low power Intel cpu, ssd, fanless, no external graphics etc.  Best to check with the PICO manufacturer on what it supports.  For a music server I would recommend the Pico powered by a linear PSU (as above)

 

The problem with the pico is that once the power enters, it uses digital voltage regulation to supply the 3 different ATX voltages to the motherboard.   A linear supply to the Pico will bring benefits however you can still go further.

 

If you have more money check out the Core Linear ATX PSU. This provides full linear power to the PC.  There are some other brands that provide a similar setup for a similar price.  I'd rather invest that sort of cash in some other gear - or a holiday :)

 

cheers,

 

gav.

Hi Gav,

 

Thanks for the info. Yeah that linear PSU is just too expensive for the purpose it serves. I believe I only require about 40w. I too use a low power 4th gen Intel CPU, with low voltage RAM and green drives with a mSATA SSD for OS drive. The problem is that the PSU is not standard ATX size, it's about half the size and I'm not sure what that standard is called. 

 

So, you recommend a Pico PSU fed by a 12V linear regulated PSU? Would just any DIY version be fine or do you find large differences in regards to quality?

 

Thanks,

Brunk

post #105 of 341
Quote:
Originally Posted by gavtorn View Post
 

Hi Brunk,

 

It depends on your budget and pc requirements.  The Pico will work with most power friendly PC's and will power an ssd - but isn't designed for gaming rigs with high end graphics etc.  My friends system (above) is using a low power Intel cpu, ssd, fanless, no external graphics etc.  Best to check with the PICO manufacturer on what it supports.  For a music server I would recommend the Pico powered by a linear PSU (as above)

 

The problem with the pico is that once the power enters, it uses digital voltage regulation to supply the 3 different ATX voltages to the motherboard.   A linear supply to the Pico will bring benefits however you can still go further.

 

If you have more money check out the Core Linear ATX PSU. This provides full linear power to the PC.  There are some other brands that provide a similar setup for a similar price.  I'd rather invest that sort of cash in some other gear - or a holiday :)

 

cheers,

 

gav.

 

LOL - I can bet you a holiday ham Brunk won't go for the $3K PSU. 

 

Edit - Damn, that man is too fast. 

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