A diagnostic tool from Whirlwind, enabling one to monitor an audio system at various points in the signal chain.
View attachment 4294
http://whirlwindusa.com/catalog/black-boxes-effects-and-dis/testers/qbox
Other companies offer similar devices.
[file]Image:qbox.jpg|thumb[/file]
View attachment 4294
http://whirlwindusa.com/catalog/black-boxes-effects-and-dis/testers/qbox
Other companies offer similar devices.
[file]Image:qbox.jpg|thumb[/file]