The Telephonics 10 Ohm Ear Phone (#AMRE-TDH-39P) is a great quality speaker. It can be used with Ambco audiometers, such as the 650A, 650AB, 1000+, and 2500.

• Telephonics AMB-AMRE-TDH-39P

Telephonics AMB-AMRE-TDH-39PTelephonics