Audio Forums/ Review sites
- Audiokarma.org
- Axiom Speaker forums
- AudioAsylum.com
- AudioCircle.com
- Audioreview.com
- Head-fi.org (headphones)
- Bottlehead Forums
- HarmonicDiscord.com
- Ecoustics.com
- Sound-Thinking.org
- Audioholics
Manufacturer Sites
- Axiom Audio
- Odyssey Audio
- NAD
- B&W Loudspeakers
- Cambridge Audio
- Sony
- Marantz
- Mcintosh
- Mark Levinson
- JBL
- Harman Kardon
- Eggleston Works
- Audioquest
- Cardas
- Energy
- PSB
- Aperion
- Asecend
- Klipsch
- Paradigm
- Onkyo
- Denon
- Yamaha
- Outlaw Audio
- Teac
- Bryston
- Wadia
- Sim Audio
- Jolida
- Cary
- Nakamichi
- Pioneer
- Tannoy
- Gilmore Audio
- Synergestic Research
- PS Audio
- Grado
- Sennheiser
- Parasound
Online Retailers
Electronic Parts / tubes/ etc Retailers