- Applied Microphone Technology, Inc
 - Livingston - Systems for woodwind, brass, percussion, strings, and fretted musical instruments. - Audio Mixers
- Manhattan - Record, edit, mix, and sound design for radio, TV, corporate and trade shows. Real-time and high speed cassette audio CD, and CD-ROM.
- Colortone Audio-Visual
- Elmsford - Rental and sale of A/V equipment such as video projectors, videoconference equipment, and more.
- GSA NY, Inc.
- New Rochelle - Custom installations, designs, and rentals for clubs, restaurants, and bars.
- New York Studio
- Manhattan - 2-track voice studio for 2-ways or tape sync's.
- Nirvana Audio
- Valley Stream - Ultra-Fi audio cable assemblies.
- Norcon Communications Inc.
- Inwood - Manufacturers of Talk Thru transaction intercom systems for ticket booths and detention facilities and other applications requiring communication through partitions.
- Professional Sound Services
- Manhattan - Sales, service, rentals of pro audio equipment.
- Sequerra Associates, Ltd.
- Stamford
- Sonorus, Inc.
- Manhattan - Dedicated to new ideas and capabilities for digital audio, networked media, and Internet services.
- Soundsmith
- Peekskill - Offering audio/hi-fi repair services.
- Stirling Audio Service
- Somerville - A professional sound reinforcement company specialising in all areas of live sound and event production.
- Thor Audio
- Fairfield - Manufacturer of all-tube audio equipment.
- Valvotronics
- Bridgewater - Creates products that have the sound of vintage tube gear.
- VRex
- Hawthorne - 3D stereoscopic imaging and display products, including stereoscopic projection panels, projectors, video cameras, and various hardware and software utilities.
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