Audio Research CD6 vs CD9 original and SE versions


I recently had an ARC CD6 in for a demo.  The system is:

Intel NUC --> MSB Analog (USB) --> Krell FBI --> Thiel CS2.7

With the ARC installed it went straight to the Krell.

What I heard was a fabulous top to midbass.  Where it did not sound right was in the bass.  For lack of a better term the bass sound was "rounded".  I tried a few different cables with varying degrees of success however I could not live with the bass.

My question is does anyone have experience with side-by-side listening of the CD6 vs CD9 and or the SE versions?  If so what differences did you hear?  I listen to mostly classical on this system and having poor bass drum, tympani, and double bass performance won't cut it.
solobone22

Showing 6 responses by solobone22

From another post:

"The Ref CD-8 used Burr Brown PCM 1792 chips configured in stereo mode. By contrast, the CD-6 and Ref CD-9 use the BB PCM 1792A, but configured in quad mono mode."

https://forum.audiogon.com/discussions/arc-ref-cd-8-compared-to-cd-6-and-or-ref-cd-9

Does this - in your experience - lead to issues with low frequency issues?
@jond @georgehifi I've looked at the MSB spinners however they use the Oppo transport which may be hard to get these days.

I've run a few different CD players into the MSB however they never quite worked for me:

Denon 1650AR
Primare CD31
CAL CL-10

The midbass on up was far superior on the ARC CD-6.

Ideally I would like something that I can play discs and has a USB or network input.
@jafant that could be.  I for one would like to hear a few ARC players back to back to back.

I think the ARC had a fantastic mid/high presentation.  A trombone should sound like a trombone and a flute should sound like a flute.  Not all trombones sound the same and not all players on the same equipment sound the same however there is a component of the sound that should identify it as a trombone or a flute.  I think that is what the ARC gets right.  

The MSB on the other hand gives a very clear presentation with a little less of that component of the sound that identifies the instruments.
The sound of the individual instruments were fuller (some might call this warmer) however the bass was muddy.  I heard the instrumental presentation as closer to what I would hear in the concert hall with the exception of the double bass which was not clear at all.

This was the impression I got from the CD6 (review is of the REF9):

From this thread:

https://www.audioaficionado.org/showthread.php?t=34305

"The Ref 9 might not be the most detailed player in the World, especially at low frequencies where it is a little warm and wooly"
@jafant what did you listen to during the demo sessions?  what were the other components?