D
- Danelectro
- DB Technologies
- Digitech
- DR Handmade Strings
- Dream Cymbals and Gongs
- Dunlop
M
- Marshall
- Marshall Lifestyle Products
- Martin Strings
S
- S.Swing
- SE Electronics
- Seiko
- Selmer
- Sennheiser
- Shubb
- Shure
- SKB
- Snark
- Soundcraft
- Stageline
- Stentor
- Supersensitive
- Suzuki
- Suzuki Pianos