The ultimate mystery-- Does that Leitner corded headset need an extra cord for this brand’s amp?

Can you just buy a Leitner headset + amp and use the cord included in the box with the amp? OR Do you also need to purchase an Easy Connect cord to use a Leitner headset with that amp?

Here are your ultimate answers:

Sennheiser UI7710 Amp-- YES! You need a Leitner Easy Connect Cord.

Executive Pro Amp-- YES! You need a Leitner Easy Connect Cord.

Plantronics M22 Amp-- NO! You do NOT need a Leitner Easy Connect Cord.

Jabra Amp-- NO! You do NOT need a Leitner Easy Connect Cord. (ALL JABRA DISCONTINUED!)