HRS (Harmonic Resolution Systems)
Equipment Rack, Isolation Base, Nimbus and Damping Plate
Experience Reports


M3 Isolation Base
CD Players, Transports, DACs
  • Audio Aero Capitole Mk II

    The player's sound was significantly improved with the isolation base under it, especially the quality of the bass and midrange articulation and timbre. This is a pretty typical result.
  • Audio Aero Prestige

    The player's sound was significantly improved with the isolation base under it, especially the quality of the bass and midrange articulation and timbre.  The radical improvement obtained by adding adding Nimbuses between the player and the Isolation Base is described below.
  • Audio Note U.K. 4.1x Balanced DAC

    Similar to our experiences with the Lamm L2 preamp, we just do not have enough Isolation Bases to go round, and though this DAC has had a platform temporarily underneath it at various time - all I can remember is that there was a general nod in its direction that it improved things, but that the scarcity of platforms forced us to fairly soon thereafter move it to a higher profiles system for a series of demos.
  • EMM Labs DCC2 DAC

    This component experienced the least improvement of any component we have tried on a HRS. We do use a damping plate on top, which has some positive effect. We hope to try Nimbuses between the DAC and the Isolation Base soon to see if this is what is required to get the usual significant delta in performance we experience with other components (often the feet that a component comes with seem to negate a lot of the effects of the HRS).

    We'll let you know!
  • Lamm L2 Tube Preamplifier

    OK, confession time. We cannot afford to buy all the Isolation Bases that we want... I mean need... in order to put them under all of our components. I know that at one time we did have an HRS underneath this component - but it has been awhile. I remember it working as expected - but I am 99% certain that one or another of the two pieces associated with this preamp (it has a separate power supply) were not on an HRS. So we look forward to both being on a platform - hopefully soon when we get our gloss black MXR rack here.
  • Edge Signature One monoblocks

    A real but somewhat surreptitious improvement in clarity of the bass was observed.
  • Lamm ML1.1 Tube monoblocks

    An amazing amount of clarity was added to the midrange and bass, making these amps sound much more like controlled and even across the frequency spectrum.
  • Lamm ML2 Tube monoblocks

    I am not sure we ever used these amps without the M3 Isolation Base - so the improvements over using another platform (the Acoustic Dreams is what we usually use - which is no slacker either and we'd put it up against any of the competition) we can only assume is the same significant increase we found with the Lamm ML1.1.

    We did try putting different HRS feet, ones specifically for lighter weight components, on the front because the front of the Lamm is so much lighter than the rear. I personally did not hear much of a difference, not to say there wasn't any, but that it did not jump out at me.

    When we put some Nimbuses between the amps and the Isolation Bases, however, it was one of those "now we're talkin'" moments, which you can read more about.

  • Brinkmann Balance turntable

    HRS makes a custom platform for the Brinkmann Balance turntable.

    Before the Brinkmann we used the Acapella Fondato Silenzio palatform. After using this platform under both the Walker Proscenium Gold Signature and the Brinkmann,  both times on the top shelf of a maple Rix Rax Grand Hoodoo - we have found that the Fondato is not the best thing for turntables (it works quite well under CDs and tube DACs and preamps) and the turntable sounds better directly on the Rix Rax shelf.

    When we put the custom HRS M3 Isolation Base underneath the Brinkmann, we finally started hearing what the table could do. Before it had sounded a little thin and tizzy, and we changed cartridges a few times trying to find an solution. But it turned out to be a vibration problems. After adding the HRS the turntable sounded rich and more controlled, with more continuousness and PRaT.

    Considering the comparatively high price of the turntable, getting the HRS platform for it is a no brainer.
Damping Plates (Note these experience reports refer to the previous version of the damping plate. There is a new version which was released in late 2005. Reports on the new plates will be forthcoming).
CD Players, Transports, DACs
  • Audio Aero Capitole Mk II

    The player's sound was somewhat improved with a mid-size damping plate centered on the top of the unit especially with respect to the detail and articulation in the bass extending up into the midrange.. Unfortunately, this requires moving the damping plate every time the door is slid open to put on a CD - but putting the damping plate on the side of the unit resulted in a diminished soundstage and incorrect imaging.
  • Audio Note DAC 3.1x Balanced

    The DAC's sound was somewhat improved with a mid-size damping plate centered on the top of the unit and towards the front, and removed a tinge of treble brightness we were experiencing.
  • Sony DVP S9000ES

    The DVD player's sound was significantly improved with a mid-size damping plate centered on the top of the unit, especially with respect to the detail and articulation in the bass extending up into the midrange.
  • EMM Labs DCC2 DAC

    The Meitner DAC sounds a little more solid and a slight edge is removed from the sound as well. There are also an almost imperceptible micro-dynamics and 'dexterity' that seemed to be removed as well. We mostly use the damping plate - Neli likes it - but sometimes Mike removes it during some personal listening sessions.
  • Audio Aero Prestige CD / SACD Player and Preamplifier

    Neli puts the damping plate on this component. I have not heard it without it so perhaps she might comment on what it does to the sound.


  • Lamm L2 Reference Linestage

    Placing two small plates, one on each side of the top of the unit, being careful as to not block the ventilation holes, such that the plates were slightly hanging off the sides - we heard an improvement in the depth and tonality of the bass.
  • We have no experience reports for these at this time. A lot of amps do not have a lot of room on top to put damping plates, and many have vents that should not be blocked. On the EDGE solid-state amps whose chassis are 1/4" thick aluminum we observed no effect.
The Nimbus System:

Nimbus Spacers with Nimbus Couplers

CD Players, Transports, DACs
  • Audio Aero Prestige

    The Audio Aero Prestige CD / SACD Player with built-in preamplifier  has both a moving mechanical device (the transport) and a vacuum tube - both of which are known to be sensitive to the dehabilitating effects of harmful vibrations. The Prestige comes from the factory with 3 black diamond racing cones as feet - a tribute to the fact that the factory also pays attention to vibration control.

    As we broke in the Prestige and listened to it improve day-by-day, we noticed a little but of an overhang, a little smearing of the notes together. Yes, we thought it could be just a little more tube-like sound than we expected, but after living with the EMM Labs / Meitner in the system for a year or so, we had grown used to a more accurate sound, a more delineated soundstage, and a little more detail with our music.

    As the weeks went on, the kind of dim and aging light bulb over our heads flickered on and we thought "Hey, aren't these symptoms we are hearing are awfully familiar, kind of like exactly similar to those associated with vibrations interfering with the equipment? Oh, and, wow, the Prestige is sitting out in front of the 6 feet tall woofers of our speakers, too....". And then our  light bulbs flickered out again.

    But, putting their brief appearance to best use, we decided to use some Nimbuses instead of the Black Diamond Racing cones underneath the Prestige in order to better couple the player to the HRS M3 Isolation Base platform.

    Here we have removed the cones and put the Nimbuses underneath the player, in the same positions where the cones had been - letting the heads of the screws that were still in place dent the Nimbuses.

    The sound was radically changed for the better. The differences in the sonics between the 50% more expensive solid-state Meitner digital and the tube-based Prestige now became almost completely one of that between different design goals and choices. The Meitner: purity and transparency, the Prestige: analog-like dynamics and harmonics.

    Obviously, letting the screw heads sit on the Nimbuses was kind of a kludge, so we later used double height Nimbuses, and positioned them under parts of the player different than that where the original feet were installed.

    Here we see the a picture of this configuration. Noticed that we reattached the Black Diamond Racing cones so that Mike would not lose them in the sometime mess that visits our house once in a while.

    We also have a blog entry on our experiences with the Nimbuses and the Prestige.
  • Lamm L2 Reference Linestage tube power supply

    There was a clarity and purity added with three of these under the L2 power supply - much better than a number of different cones we have tried. There was also an improvement in the depth and tonality of the bass.

  • Audio Note U.K. Kegon monoblocks

    The 300B Kegon amplifiers benefited from the M3 Isolation Base, but not as much as we had anticipated or hoped for. It was then that we noticed that our Kegons, which are old and have been shipped all over the country and auditioned by many dealers and audiophiles, were ....wobbly. They rested on only 3, sweet little feet.

    So, what to do, what to do. Well, you can see what we did, we added 3 nimbuses under each Kegon (it looks like only two here, I know, but we have one under the front and two, side-by-side under the back. Bamm. That did it. Everything was tighter. The Kegons always grip the speaker with an iron (or is it silver) fist, but now there was much more space between the notes. The decay of each note was more precise and did not linger.

    It was the significance of this result, the great improvement after putting the nimbuses between the HRS M3 and the amplifier, that prompted us to try the same thing under the Lamm ML2.1 amplifiers and the Audio Aero Prestige CD/SACD player - on which, it turned out, there was an even greater impact (to which I attribute the fact that the Kegons were already doing a pretty darn good job at the things that unwanted vibrations traditionally degrade).


  • Lamm ML2 monoblocks

  • EDGE NL Reference amplifiers

    We first came up with putting Nimbuses under the Reference 'pyramid' amps at the high-end audio show in Denver, RMAF 2005. Always on the lookout to eek every last bit of performance out of each component - the sputtering light bulbs, yes,, the same ones referred to earlier, above our heads were able to convince us to try this tweak and see if it helped any.

    What it did was to even out the frequency response some. There was a little hump in the upper bass and a corresponding depression in the low mids and they seemed to even out some - and in the very large, undampened room at the show, this helped calm down the overall presentation of the music some which was appreciated.

    Interestingly, at the show we only had 7 Nimbuses so one amp went limping...

    Here we see an example. Most of the other feet are more centered on their Nimbus, but we haven't noticed any ill effects with this being slightly off center. Then again we haven't tried moving it so that it is completely on center and seeing what it sounds like either. At 220 lbs., we run out of steam after not too long a while when it comes to doing something that requires moving them around in any way.

We also have a blog entry on our experiences with the Nimbuses and the Edge NL Reference amplifiers.

Analog Disk  

  • We have no personal experience reports for the Analog Disk at this time though we have sold quite a few and everybody seems to be very happy with the results.


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