• With both HIGH 1 and LOW filters the passband width is from 400 to 3000 Hz
• With both HIGH 2 and LOW filters the passband width is from 400 to 1200 Hz
• With both HIGH 1, HIGH 2 and LOW filters the passband width is from 400 to 900 Hz

By narrowing the bandwidth of the audio stage, the noise component of the signal can be reduced.

This speaker also has a standard 1/4 inch headphone jack on the front panel of the speaker and a Line Output Jack on the back panel (to feed a recorder, RTTY unit, etc.). These convenient output jacks are post filtration. The input posts are spring-loaded terminals. An audio cable (bare wire to plug) is provided. This speaker filter is 7.2x4.7x12.3 inches 4.4 Lbs (180x120x310mm 2 kg). The front panel may elevated by the extending the front feet with supplied feet extenders.