DX Covers SPE ( Societa Per l’Elettronica ) Expert 1K-FA HF linear amplifier radio dust cover. The unit is manufactured from leatherette with a soft felt lining. The back of the cover is left open so all cables can remain plugged in. The front of the cover is embroidered with the SPE logo and model number. All of our covers have their respective manufacturer’s approval to use the copyrighted branding.