Univox EC-100 Echo Chamber
The EC 100 Echo Chamber (1,
2) had
volume, balance, repeat and delay controls. The EC-100 had a pull control on
the repeat knob for sound on sound, this allowed a passage to be recorded and
looped over and over. The maximum delay was about 100ms.
Copyright Michael Wright, author of Guitar Stories Vol. 2, and Vintage
Guitar Magazine; used by permission.