Hosa GPP-419 Adaptor
Mono 1/4" Female to Stereo 1/4" Male
Female end accepts a mono signal and applies it to both Tip and Ring contacts at the male end. Use it to esnd a mono singal to both Left and Right contacts in a stereo 1/4" jack. Also can be used to "trick" and audio mixer's insert (sent / return) jack into behaving like a direect output.