Silent Running Audio (SRA) Ohio-Class XL

Silent Running Audio (SRA)

Ohio-Class XL

Introduced 2004$1,000 MSRP

The Ohio-Class XL is Silent Running Audio's foundational isoBASE isolation platform — the product that launched the company — built using a proprietary, high-pressure nanoparticle composite compiled under a nitrogen blanket in an airless environment, with internal bladders filled with a thermally reactive copolymer whose stiffness can be tuned to the exact component it supports. Rather than a one-size-fits-all shelf, each unit is custom-built to a specific piece of equipment via SRA's "Component Specific Design" methodology, using finite element analysis and a database of component measurements to model and counteract air-borne, floor-borne, and equipment-borne vibration for that exact unit.

MSRP

$1,000

Used market · Mint

$2,050

+105% vs MSRP
as of Sep 1, 2026

MSRP to used market

From $1,000 at launch to $2,050 today.

Specifications

Price
Custom/equipment-dependent; comparable Ohio-Class platforms ranged roughly $1,000–$8,000 each (a related XL+² pair for Burmester 911 mk.3 amplifiers cost $3,000 each); a secondhand Ohio-Class XL isoBASE listed at a retail price of €2,800
Weight
Varies according to the supported component; not numerically stated in the fetched sources
Lead time
Approximately one month from order to delivery for made-to-order platforms of this type
Dimensions
Vary per component; one specific sold unit measured 45.5 cm W × 44.0 cm D × 9.5 cm H
Core materials
Proprietary high-pressure nanoparticle composite (over 250 distinct materials/chemicals) compiled under a nitrogen blanket; internal bladders filled with a thermally reactive copolymer whose stiffness ("darometer") can be tuned per component; high-tensile steel spiked footers; exterior aggregate coating incorporating ground rubber and crushed glass; standard gloss-black piano finish
Finish delivery
Standard gloss-black finish, with other colors available at extra lead time/cost; shipped in custom-made padded wooden crates; full lifetime warranty to the original owner
Design methodology
"Component Specific Design" — custom-built and calibrated to a specific component's dimensions, weight distribution, internal parts (transformers, drive units, flywheels), and construction materials, using finite element analysis to model vibration behavior before construction; a modeling data stream reportedly processes over 130 inputs per platform
Isolation approach
"Counter-motion technology" combining an upper housing (coupling/rigidity) with a lower section (de-coupling/mass); addresses air-borne, floor-based, and equipment-borne energy; does not rely on Sorbothane, since SRA states such materials lose damping ability as they compress over time

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