The HLA 300V is a 12V linear amplifier with a maximum output power of 280W, designed for use on all HF bands from 1.8 to 30 MHz, with a drive power of 1–15W. The HLA 300V features six Low Pass Filters, which are automatically activated by a microprocessor or can be manually selected using the front panel control. In addition, it includes an LED power meter, a 3dB input attenuator, and RTX control via either VOX or PTT. The amplifier is also equipped with three 80mm cooling fans mounted on the heatsink for efficient cooling.