Minus K Technology

100BM-1

Introduced 2013$5,400 MSRP

Minus K Technology is a small California engineering firm best known for negative-stiffness isolation systems used in scientific instrumentation, which it also sells in low volumes directly to audiophiles for turntables and sensitive electronics; each platform is essentially hand-built to order from a published options list rather than mass-produced. The 100BM-1 uses a pre-loaded spring working against four pairs of mechanical flexures to achieve sub-1Hz vertical resonance, a level of measured isolation performance well beyond typical audiophile footers, and it has been reviewed in the specialist audio press and used by owners of reference-grade turntables such as the Continuum Caliburn.

MSRP

$5,400

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Specifications

Price: $5,400 for the 100BM-1 configuration
Dimensions: 24" x 23" x 9"
Platform weight: Approximately 80 lbs
Nominal load range: 60–100 lbs
Vertical resonance: 0.5 Hz or less across the 60–100 lb load range
Bm 1 line load options: Available from 100 lb to 1,050 lb rated capacity across the BM-1 series, priced $5,400–$8,570
Shipping setup hardware: Four red shipping collars secure the platform for transit and are removed after installation
Vertical isolation mechanism: Pre-loaded spring interacting with four pairs of flexures; adjustable via a crank to compensate for payload changes
Horizontal isolation mechanism: Four beam-columns acting as a horizontal spring with a negative-stiffness effect under load