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“The R3X Isolation Base is the latest version of a design derived from our S1 Isolation Base.  It has the same broad band isolation system used in our reference level M3X Isolation Base and shares 60% of the plinth construction with our high performance S3 Isolation Base.  The R3X top and bottom plate is made from a new custom HRS non resonant plate material that increased the mass density of the R3X by 28% over the previous R1 Isolation Base Design.  These design improvements allow the R3X to offer more of the performance achieved by its very ambitious siblings.”

Michael Latvis, Chief Engineer
Harmonic Resolution Systems Inc


The R3X Isolation Base is a highly innovative design that eliminates noise, revealing a new level of musical performance. It is manufactured from five different materials including a proprietary resonance control stage and billet machined aircraft quality aluminum trim. The R3X load range is matched to the component weight for maximum performance just like our high performance S1 and reference level M3X design. The R3X can also be modified in the future to preserve initial investment. This is a unique product that offers our customers true Harmonic Resolution Systems performance that is derived from a decade of experience creating industry leading designs.

The R3X Isolation Base is produced in two standard sizes and is available in a black or silver finish.  Each size can be purchased in any of the four different load ranges to optimize component performance.

If one of the standard sizes or load ranges does not fit your needs, HRS also offers hundreds of custom designs in our M3X2 Isolation Base product line including custom designs for all large turntables and amplifiers. Please contact your local sales representative or Harmonic Resolution Systems for assistance with custom Isolation Bases for your components.

The broadband noise reduction system in the R3X maximizes performance and is highly effective on a wide range of surfaces and structures. The low profile compact design also minimizes space requirements. The R3X Isolation Bases Integrate directly into the HRS audio stand frames. (R3X-1719, R3X-1921 sizes)



(w x d x h)
19″ X 17″ X 3″
48.3 X 43.2 x 7.6 (CM)
24.5 LB
11.1 KG
YELLOW (YL)0 – 35 LB (0 – 16.0 KG)
RED (RD)36 – 60 LB (16.1 – 27.4 KG)
GREEN (GN)61 – 100 LB (27.5 – 45.6 KG)
BLUE (BL)101 – 155 LB (45.7 – 70.3 KG)


(w x d x h)
21″ X 19″ X 3″
53.3 X 48.3 X 7.6 (CM)
30 LB
13.6 KG
YELLOW (YL)0 – 30 LB (0 – 13.8 KG)
RED (RD)31 – 55 LB (13.9 – 25.1 KG)
GREEN (GN)56 – 95 LB (25.2 – 43.3 KG)
BLUE (BL)96 – 150 LB (43.4 – 68.0 KG)


Product Manual Product Literature

Image Gallery

Front View R3X-1921-B (Black Finish)
Front View R3X-1921-S (Silver Finish)
Four R3X-1921-B Loaded Into RXR-1921-4V Frame
Front View of Black R3X Isolation Bases in Black RXR Frame
Front View of Black R3X Isolation Bases in Maple RXR Frame
Front View of Black R3X Isolation Bases in Double-Wide Maple RXR Frame
Close Up of Black R3X in Maple RXR Frame
Black R3X Isolation Bases in Black SXR-1921-3V Frame
Close up of R3X at Top Location in RXR Frame
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