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Pure i-20 iPod/iPhone Dock as a DAC - Page 36

post #526 of 534
Quote:
Originally Posted by Argo Duck View Post

Experienced reviewer Skylab reviewed the PURE i-20 as a transport, which promptly caused him to sell his Wadia iPod transport. The notion of using the i-20 (with lossless material) or similar devices in a high-end speaker system is perfectly fine.

The built-in DAC did not impress Skylab so much. But here's the thing - you could start with it and add a standalone DAC later.

As to MacBook versus iPod/i-20 - I have a bias that built-for-one-purpose devices such as the latter pairing should sound better. But it's just a bias. I have not directly compared these situations.

 

Just thought I'd add my 2cents - comparing Tidal Hifi streaming from

iPhone 5s->adapter->Pure dock->No brand Coax cable->Auralic Vega DAC versus

iPhone 5s->adapter->Pure dock->No brand TOSlink->Auralic Vega DAC versus

Macbook->Lightspeed USB cable->Auralic Vega DAC

 

Listening to Hey Now, London Grammar, the vocals and base line were similar with the Pure dock. The Coax had more air and space via the Coax, but it was very close.

However, the sound quality from the Macbook and USB into the DAC was significantly better than via the dock. More detail, space and sound stage. 

This surprised me, I would have thought the two would be closer.

I guess I'd put this down to the electronics in the dock that's stripping the digital stream from the phone.

Guess I'll be keeping the Mac around for a bit longer.

(Music via Tidal was also not surprisingly significantly better than Apple Music and Spotify. I suspect that there would be less audible difference on lower bit rate stream between the dock and Mac)

post #527 of 534

So let's say I set my iPod up with this dock and then run into my DAC (Sennheiser HDVD800). How would you say that compares to:

 

1. An LOD to analog cable?

2. A hifi portable music player (something like, say, a Pono)?

 

Thoughts appreciated.

post #528 of 534

First, your iPod had better have a 30-pin connector and not the newer Lightning connector.  The Pure i20 has a 30-pin connector.

 

1.) An LOD to analog from your iPod would use the iPod's internal DAC instead of the far superior DAC within the Sennheiser HDVD800.  No contest.

 

2.) Some portable players have amazingly good DACs, so it's possible you could end up preferring one of those DACs to the the DAC within the HDVD800 - for your headphones, your ears, and your tastes.

post #529 of 534
Quote:
Originally Posted by zilch0md View Post
 

First, your iPod had better have a 30-pin connector and not the newer Lightning connector.  The Pure i20 has a 30-pin connector.

 

1.) An LOD to analog from your iPod would use the iPod's internal DAC instead of the far superior DAC within the Sennheiser HDVD800.  No contest.

 

2.) Some portable players have amazingly good DACs, so it's possible you could end up preferring one of those DACs to the the DAC within the HDVD800 - for your headphones, your ears, and your tastes.

 

Thanks for the input! So how would I go about bypassing the iPod's internal DAC? Is that even possible?

post #530 of 534
Quote:
Originally Posted by NewNeophyte View Post

Thanks for the input! So how would I go about bypassing the iPod's internal DAC? Is that even possible?

You can get a CCK (camera connection kit), available for eithet 30-pin or Lightning connectors, which effectively makes your iDevice look like the USB port of a laptop or PC, but without any 5V power - it only supplies USB data to a DAC. If you try this, the DAaC must be self-powered - it must not expect to receive 5VDC from the USB cable, not even for detecting the source or affecting a "handshake." Note that many DACs that plug into mains power (120V AC), have USB receivers that still expect to see 5V power from the USB cable. Designers do this to isolate the USB midule from the potentially noisy environment that the DAC itself is causing, but it puts the responsibility of providing clean power on the source device. IDevices, in part by nature of simply being battery operated, make excellent, noise-free signal sources, but if your DAC requires power, you'll have to use a USB Y-Cable that allows only data to come from the iDevice and CCK, while pulling power from a 5VDC USB hub (cheap but nousy solution) or a 5VDC linear regulated power supply like the $80 Teradak Teralink X1/X2 power supply, available on eBay (an excellent, noise-free, bang for the buck solution that includes a USB Y-cable) or a $175 Uptone Audio USB Regen (the ultimate solution for providing your DAC's USB input with high sognal integrity - and pretty decent 5VDC power, if necessary).

OR

You can buy a DAC or DAC/amp that accepts input from iDevices directly - like the Oppo HA-1 (desktop) or HA-2 (portable) and others.

I'm not familiar with the soecs for that Sennheiser's inputs. Are you sure it doesn't have a USB A jack labeled "Apple"?
post #531 of 534
Quote:
Originally Posted by zilch0md View Post


You can get a CCK (camera connection kit), available for eithet 30-pin or Lightning connectors, which effectively makes your iDevice look like the USB port of a laptop or PC, but without any 5V power - it only supplies USB data to a DAC. If you try this, the DAaC must be self-powered - it must not expect to receive 5VDC from the USB cable, not even for detecting the source or affecting a "handshake." Note that many DACs that plug into mains power (120V AC), have USB receivers that still expect to see 5V power from the USB cable. Designers do this to isolate the USB midule from the potentially noisy environment that the DAC itself is causing, but it puts the responsibility of providing clean power on the source device. IDevices, in part by nature of simply being battery operated, make excellent, noise-free signal sources, but if your DAC requires power, you'll have to use a USB Y-Cable that allows only data to come from the iDevice and CCK, while pulling power from a 5VDC USB hub (cheap but nousy solution) or a 5VDC linear regulated power supply like the $80 Teradak Teralink X1/X2 power supply, available on eBay (an excellent, noise-free, bang for the buck solution that includes a USB Y-cable) or a $175 Uptone Audio USB Regen (the ultimate solution for providing your DAC's USB input with high sognal integrity - and pretty decent 5VDC power, if necessary).
 

 

He hasn't clarified in this nor in the thread he started what iPod it was, but I think considering he never called it a Touch, note that the CCK does not work on many older Touch models much less on any of the non-Touch iPods, ie from the original up to the 7G Classic. In addition, it has to be iOS7 even on later Touch models, but again I think it needs to be at least the 5g Touch. He'll have to check if it's any other Touch model.

 

Quote:
Originally Posted by zilch0md View Post

I'm not familiar with the soecs for that Sennheiser's inputs. Are you sure it doesn't have a USB A jack labeled "Apple"?

 

No need to be familiar thanks to Google - found this one in about ten seconds.

 

post #532 of 534

Hi ,

 

I have 3 Ipod Classics with iFlash-mSata adapter + mSata cards :
. Crucial M500 480gb
. Crucial MX200 500GB
. Samsung EVO840 1Tb

All Ipods have a 1900mAH big battery
I noticed something strange.
When Ipods are not fully charged, and even when they are fully charged sometimes, if I dock the Ipods on this dock (Pure i-20), there are random pauses or skips when playing tracks while charging the Ipod. I can see that the Ipod is stopping charging  when it skips or pause. When the Ipod shows it is charging again, the song restarts
It seems the Ipod can’t play through dock and charge at the same time without having some problems.

I play Apple Lossless files only

Did someone ever notice that?
Thank you,

Max


Edited by frigomax - 5/25/16 at 2:52am
post #533 of 534
Yes. There is a small ribbon cable inside the unit that connects the circuit card in the base to the connector on the stalk. Over time, the ribbon connection tarnishes from dis-similar metals and the charge current becomes unrelaibe. Eventually the unit will stop charging all together. It is possible to dis assemble and clean the tiny ribbon connection. This is the only way i have found to stop the clicking. My unit did not do it for more than a year...and then did it all the time. The 'fix' lasts about 6 months. I believe it is a design flaw. The unit will charge and play at the same time and not interfere with the music if the connection is good. Fuzz in the ipod connector can also cause this.
Quote:
Originally Posted by frigomax View Post

Hi ,

I have 3 Ipod Classics with iFlash-mSata adapter + mSata cards :

. Crucial M500 480gb

. Crucial MX200 500GB

. Samsung EVO840 1Tb
All Ipods have a 1900mAH big battery

I noticed something strange.

When Ipods are not fully charged, and even when they are fully charged sometimes, if I dock the Ipods on this dock (Pure i-20), there are random pauses or skips when playing tracks while charging the Ipod. I can see that the Ipod is stopping charging  when it skips or pause. When the Ipod shows it is charging again, the song restarts

It seems the Ipod can’t play through dock and charge at the same time without having some problems.
I play Apple Lossless files only
Did someone ever notice that?

Thank you,
Max
post #534 of 534

Hi GrindingThud,

 

Thank you for your precious information

I did it and it seems to work perfectly

Thank you

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