Empower
- Makes home theater AC power conditioners. USA.
- http://www.empowerac.com/

NC - Never Connected
- Power supply for high-end audio systems and equipment. Showcases information on OEM and upgrade options.
- http://www.never-connected.com/

Furman Sound
- Manufacturer and distributor of audio and video signal processors and AC power conditioning components. USA.
- http://www.furmansound.com/

ExactPower
- Manufacturer of voltage regulators.
- http://www.exactpower.com/

Chang Lightspeed
- Ohio-based power conditioner maker.
- http://www.changlightspeed.com

Balanced Power Technologies
- Manufacturer of audiophile grade power conditioners for home audio and home theater systems. Utilizing a design that reduces audio and video noise within one's system.
- http://www.b-p-t.com

Audio Power Industries
- Manufacturer of power conditioner.
- http://www.audiopower.com/