The adapter I use to connect a pair of headphones on the keyboard. It also looks after a week all the best of, nothing wobbles and no similar Aussätzer However, sometimes I hear the Keyboardspielen as a crackle noise, very noisy, but you can hear it if care is taken. For me as an amateur keyboardist not bad, but certainly nothing for professionals. Of course, I do not know if it really is on the adapter, to the headphones or the audio output of the keyboard.
Conclusion: 2 are well spent, but I would draw as a professional user to high end adapters.
