Speakers with DSP filters.
These devices are designed specifically for listening to the bands on HF and VHF in order to reduce static noise, background noise etc..
The maximally comprehensible ' increases considerably, and you avoid fatigue during long hours of listening.
Both models can be used for listening on SSB and FM/AM. The model NES-10-2 Mk3 provides change the level in 8 steps (DIP switches are on the back of the device). Also the model NES-10-2 has volume control, On/Off switch for the DSP function and a contact 3.5 mm mini jack for connection to headphones or an external speaker.
Supplied with 2 m cable with a 3.5 mm mini plug connector (mono) and must be powered with voltage from 12 to 28V DC; or DC cable is supplied. The accusation is useful for mounting bracket installation in the car or at home.