Controls Center Frequencies

Bass: 250 Hz and 500 Hz

Mid: 1 KHz and 2 KHz

Treble: 4 KHz and 6 KHz

Maximum Output

120 db SPL with standard telephone receiver, 130 db SPL with large 8 ohm close coupled headphones

Attenuation (typical each range)

-20db at 2 octave points

Phone Input

Impedance: 600 ohm

Connector: Modular handset

Maximum Input Without Distortion: -30 dbm

Phone Output

It can be used with the old style carbon microphone or the newer electret microphone equipped telephone sets.

(These units can not be used with cordless phones.)

Television and Radio Input

Impedance: <= 300 ohm

Connector: Mini phone plug

Input for Electret Microphone

Impedance: 10k ohm

Input: -60 dbm (Mike dependent)

Connector: Mini phone plug

Output Impedance

8 ohm

Power requirements

9 Volt Battery or optional 9 Volt Power Adapter

Battery Life

4 to 8 hours of active use for a carbon zinc battery, 11 to 20 hours for an alkaline battery, life depends upon type of battery and output levels

Physical

Width: 5.7"

Height: 1.5"

Depth: 3.6"

Weight: 7.5 ounces

Made in the USA