Some other custom modifications and capabilities include:

• Different vertical, horizontal or tilt stiffness in an isolator
• Different vertical, horizontal or tilt damping in an isolator
• Vacuum compatibility
• Mildly magnetic
• Heavy load capacities (Six 10,000 lb isolators for NASA's James Webb
  Space Telescope Ground Testing).
• Large displacements
• Large temperature variations
• Compact systems (e.g., a seven-inch cubic 1/2 Hz isolator for a 700 lb payload;
  a six-inch diameter by 4-inches tall 1/2 Hz vibration isolation platform for a 3 lb payload.)
• Vertical auto-adjust feature to automatically adjust for change in payload weight.
• Lock-unlock feature implemented manually with a switch or automatically
  with signals, from a stage motion control system, for example.

Since the early 2000s, Minus K Technology, the developer of Negative-Stiffness vibration isolation, has released several vibration isolation platforms for the high-end audio market. These products have been accepted with high acclaim by audiophiles and audio system manufacturers worldwide.

The industry's highest performing vibration isolation system is available in a cost-effective, low-height platform. The BM-8 Series vibration isolation platform offers true ½-Hz isolation performance vertical and 1.5 Hz horizontal and is easy to use. No air or electric power is required, there is no maintenance and nothing to wear out. It is 18Wx20Dx4.6H and is available with nominal load capacities from 25 to 250 lbs. It is ideal for turntables, CD transports and other audio components.

The Helix One® and Helix Two® turntables from Dohmann Audio, for example, come fully integrated with Negative-Stiffness vibration isolation.

Doehmann Helix 1 (BM-8 fully integrated) Doehmann Helix 2 (BM-10 fully integrated) “The ability of Negative-Stiffness to deal with vibration and resonance is unsurpassed, and allows the music to be enjoyed with an outstanding level of realism. Analog audiophile aficionados talk about blackberry notes, where the base is too prominent and muddy, explained Dohmann. This is often caused by a reinjection of vibration into the playback mechanism, adding to the amplitude of the needle movement and creating more signal that what is physically in the groove. But Negative-Stiffness vibration isolation cleans this up, so that the base is more natural. The timbre of the instrument used to produce the base, whether a string, piano or drum, sounds more like the real thing. It enables a sense of peace and calm to the playback."   - Mark Döhmann, Founder Döhmann Audio The latest generation of Negative-Stiffness vibration isolation technology, embodied within the new ultra-thin, low-hieght Minus K CT-1, truly represents a significant advance in sound quality in a very compact package for high-end audio perfectionists. SAT (Swedish Analog Technologies) XD1 Record Player System with Minus K CT-1 [integrated into the platform]