Hi-Res+Esoteric K-01+USB input+JR Capri S2


With the addition of the Jeff Rowland Capri S2 preamp in my system, I revisited hi-res downloads from my PC to the USB input of the K-01.

My initial impressions of hi-res through the K-01's USB input and digital volume control were disappointing as noted in another thread.

But now with the JR Capri S2 preamp in place, playing hi-res through the K-01's USB input and its balanced analogue outputs, the difference is indeed night and day. Every sonic aspect is improved to another level by leaps and bounds.

The only logical explanation for this is that hi-res needs to be played through an analog preamp to maximize the potential of its resolution. When playing through the K-01's digital preamp, the loss of bits at less than maximum digital volume becomes readily apparent during listening.

Cheers!
128x128jon2020

Showing 12 responses by jon2020


Thanks for the heads up, Mark.

sfstereo, I am sure you are a happy camper with your Berkeley unit which had the highest score in the review.

Cheers!
Jon.
Guido,
I use PS Audio AC12 power cords for both the K-01 and the Capri. I may consider the Z-tron PC's when an opportunity for a home audition comes along.

Gocubs99,
Your observation about better sonics with USB to SPDIF converter is interesting. It is possible that SPDIF is superior to USB direct if the converter is designed well and with premium parts.
I am a bit puzzled when you say that your player's CD playback of hi-res is better than your computer rig. Do you mean SACD?

I am now fully convinced of the benefits of hi-res. When it is well implemented, it can indeed sound better than redbook cd.

Cheers!
Mark,

What USB to SPDIF converter are you using?
The MF and Bel Canto devices have been well received by the audio press and I hope to audition these at home.

Jon
Hi all,

I need help about 192/24 files played through the same set-up as above. With JRiver, the K-01 accepts the 192/24 signal via USB from my Windows 7 PC by flashing 192 on its display. But once playback begins, I hear continuous pops and crackles amidst the music. When I go back to 96/24 files, the pops and crackles are gone.
Does anyone have the same experience and is there a solution to this?

Many thanks in advance.
Jon.
I have solved the problem myself. Sheer dumb luck! In JRiver, under Options -> Output settings -> choose Wasapi. Viola! No more pops and crackles; just sweet, sweet 192/24 music! Enjoy!
Mark,
Our posts crossed. I did try to increase the buffer with ASIOforAll but that didn't work.
I then remembered reading somewhere that Wasapi is the preferred way to go. So, I switched from ASIO to Wasapi, and that's all, folks!
For anyone wondering what the differences are between ASIO and WASAPI, here's a link from a Computer Audiophile forum.

http://www.computeraudiophile.com/f8-general-forum/asio-vs-wasapi-17898/
Here is another link.

http://www.overclock.net/t/1124291/wasapi-vs-asio-which-do-you-use-why
Mark,
I just discovered something and would like to share it with you and other K-01/K-03 owners out there.
Apparently the K-01 has a built-in USB to SPDIF converter. If you go to the Digital Out menu and choose THRU, the player cnverts the usb signal to spdif before routing it to the DAC.
I tried it and find the sonics way better than before. Since you have the Bel Canto Ref link, you can compare with and without it in the chain.
On a related note, playing music from an ultra fast SD card in the SD slot sounds better than from the computer's own hard disk or from a Usb thumbdrive in a usb port.
Also, if you use JRiver, Wasapi - Event style is the best output mode setting.
Happy listening!

I was hoping to hear that the Ref link was blown away by the player's digital throughput but ..... Dang! Looks like I will be now forking out dough for the Ref link. Thanks to you for the heads up, Mark! :)
Cheers! Jon.

Hi sfstereo,
Thanks for your input.
Tell us more about your set-up :
Mac or Windows, software, usb cables, etc.
Cheers!
Jon.
You guys have to try this. I initially played all my hi-res files with ORG upsampling and no filter on. While sticking to no filter on so as not to limit the higher frequencies, I switched upsampling to DSD. It was a jaw-dropping experience for me and I hope it us for you too. I tried this with 24/44.1, 24/96, 24/192 files and the improvement was across the board for all sonic parameters. It is as if Esotetic made the DSD upsampling option solely for computer audio.
Happy listening!