P.W.B. Electronics
Peter Belt makes modifications to other people's electronics and sells accessories so to enable others to do the same.
http://www.belt.demon.co.uk/

Van Den Hul
Dutch maker famous for ultra-high-end audio cartridges and cabling.
http://www.vandenhul.com/

Wattgate
Kimber Kable outlets and plugs.
http://www.wattgate.com/

UltraStat
Devices to eliminate user induced static discharges to audio equipment.
http://ultrastat2000.com/consumer_more_static_versastat_audio.html

Brick Wall.
Manufacturer of surge protectors, includes explanation of technology's workings and advantages.
http://brickwall.com

Ringmat Developments
Circular mats go both under and over LPs.
http://www.ringmat.com/

RPG Diffusor Systems
Features physical room treatments, and software.
http://www.rpginc.com/

Shun Mook
Offers Mpingo disks and other room-improvement devices.
http://www.shunmook.com/

Shakti Innovations
Makers of Stones, passive add-ons, and also cable-ware.
http://www.shakti-innovations.com/

Marigo Audio Lab
Cable-ware and tuning dots.
http://www.marigoaudio.com

Bybee Technologies
Power and audio signal filtration from California; claims use of quantum/superconducting technology; partially designed by John Curl.
http://www.bybeetech.com/

Prefer Professional Audio Products
Manufacturer of professional audio and video products. Imports and export.
http://www.prefer-ummels.com/

Zero Impedance
Add-on devices such as toroidal autoformer that have the ability to multiply a speakers impedance by 2x, 3x, or 4x.
http://www.zeroimpedance.com/

TWD Acoustic Products Ltd
Produce acoustic products and wireless projects for headphones.
http://www.twd-acoustic.com

Taiwan Carol Electronics Co. Ltd.
Taiwan. Manufactures a range of dynamic and multimedia microphones, such as wireless, supercardiode, reciting, CB, cable, mega phone, as well as speakers and power amps.
http://www.microphone.com.tw/

VansEvers
US maker of cables and resonators, power conditioners, power cords for guitar and home audio. Provides support, reviews and comments.
http://www.vansevers.com

AudioTech
Easily installed, home intercom and stereo sound systems. Suitable for new construction or older homes.
http://www.audiotechnology.com/

Hanics
Manufacturer for multimedia accessories including micro speaker and receiver, microphones, and hands free earphones.
http://www.hanho.com/

O. W. Donald Co.
Manufacturer of mobile TV antenna, audio and video cables, noise filters, and repeaters
http://owdonald.com

Eighth Nerve
Manufacturers of cones, acoustic panels and power cords. Based in Nashville, Tennessee.
http://www.eighthnerve.com/

FT Audio
Manufacturers of passive control unit and remote control.
http://www.ftaudio.com/

Klippel GmbH
German company specializing in measurement and control technology for loudspeaker measurement for speaker manufacturers.
http://www.klippel.net

Nitty Gritty
Makes vinyl cleaning systems and accessories.
http://www.nittygrittyinc.com/

Jitter
German manufacturers of universal jitter attenuation device. Provides also information about jitter.
http://www.jitter.de

Michael Green Audio
Sound specialist and designer of speakers’ furniture and accessories. Provides discussion forum and industry news and reviews.
http://www.michaelgreenaudio.com

Zon Audio
Manufacturers of audio distribution devices such as multi-source, multi-zone inputs and outputs sound distributors.
http://www.zonaudio.com

Innovative Audio
Makes resonance-control components and furniture and loudspeakers accessories.
http://www.polycrystal.com/

UpBeat Audio
Manufacturer a portable amplifier and splitter. USA.
http://www.upbeataudio.com

Nempee
Audio acoustic consultant, software developer and manufacturer of loudspeaker drivers. India.
http://www.nempee.com/

Ichikawa Jewel
Manufacturer of XLR and RCA connector, tonearm, cables and accessories. Japan.
http://www.jelco-ichikawa.co.jp/

Accusound Pro Audio
Manufacturer and retailer of microphone, instrument and patch cables. Online order. USA.
http://www.accusoundproaudio.com/

ViaBlue
Manufacturer of cables, plugs, spikes and accessories. Germany.
http://viablue.de/com/

Music Works
Design and supply power leads, blocks and tables for hi-fi music systems and home cinema equipment. UK.
http://www.musicworks-hifi.com/

Puretone
Manufacturer of hearing aids and assistive listening devices. EN46002 Medical Devices Directorate.
http://www.puretone.net

Everway China Limited
Specialized in producing digital voice recorder spy pens. China.
http://www.everwaychina.com

Electra Glide
Manufacturer of power cords, interconnects, speaker cables and connectors made with foil and ribbon conductors. USA.
http://vxn.he.net/~vxn0767/home.htm

Milty
Makes sound isolation, connectors and cleaning solutions. UK.
http://www.milty.co.uk/

Vivid Audio
Makes and design gold, silver and cotton audio cables.
http://vividaudio.net/

ZCable
Loudspeaker, interconnect cables, loudspeaker cables, power cables and headphone cables.
http://www.zcable.com

GrayWolf CD JukeBox
Remote control software program that allows control over a multidisc CD player with infrared.
http://home.earthlink.net/~gwsoft/products.htm

Sonos UK
Digital wireless multi room music systems. UK.
http://sonos-uk.co.uk

Shenzhen Samewin Electronics Co.,Ltd.
Manufacturer of earphones and USB data cables. China.
http://www.samewin.com

Golden Sound
Manufacturer of acoustic discs, banana plugs, cones, squares, pads and cables. USA.
http://www.goldensound.com/

Warren Gregoire and Associates
Manufacturer of amateur radio headsets, desk microphones and push to and push to talks and also PC headsets for personal computers. Canada.
http://www.warrengregoire.com/

A.R.T.
Makes cables and accessories. Italiy.
http://www.arthifi.it/

Digital Recordings
The company does advanced research and development in acoustics and provides high-tech audio solutions for individuals and industry. Lists products, services, publications, opinions, links and contact details, plus Sound Off magazine.
http://www.digital-recordings.com/

Gruv Glide
Makes records treatment products. USA.
http://www.gruvglide.com/

IsoTek Systems
Makes power conditioners, connectors, cables and plugs. UK.
http://www.isoteksystems.com/

Mi-horn
Makes anti-vibration footers, loudspeaker horn upgrades and stands footers. USA.
http://www.mihorn.com/

Oyaide
Makes power supply, cables, interconnects, plugs, power cord, and in-wall plate. Japan.
http://www.oyaide.com/

Pie
Manufacturer of OEM integration devices car audio installation accessories and Apple iPod interface.
http://www.pie.net/