Builder
- Nickname: Supersurfer
- Name: Stefan Wapstra
- Country: Netherlands
- Projects: 3
- Comments: 0
Projects
AD1

- Item: Balanced triode amplifier
- Type: AD1
- Posted: 26 October 2023
- Builder: Supersurfer
- Country: Netherlands
- Comments: 1
SE 300b

- Item: Mono integrated SE 300b amps.
- Type: SE 300b
- Posted: 6 August 2023
- Builder: Supersurfer
- Country: Netherlands
- Comments: 2
Folded open baffle

- Item: Field coil loudspeakers
- Type: Folded open baffle
- Posted: 15 July 2023
- Builder: Supersurfer
- Country: Netherlands
- Comments: 0