The RT-N12HP utilizes a custom hardware architecture that augments wireless transmission and signal quality with detachable 9dBi high-gain antennas and a discrete signal power amplifier.

ENGADGET: ASUS unveils RT-N12HP WiFi router with extra-long antennas: compensating for anything?

To serve home and office users who need wider wireless coverage, the ASUS RT-N12HP high-power wireless-N300 router employs detachable 9dBi antennas and a unique hardware signal power amplifier.

ENGADGET: ASUS unveils RT-N12HP WiFi router with extra-long antennas: compensating for anything?

That means that not only the signal input into the amplifier is symmetrical but also the signal output and therefore the connection to the headphones.

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The Windows Phone 8X by HTC featuring Beats Audio also offers a unique audio amplifier powering the 3.5mm audio jack and the speaker, boosting the audio signal for even better sound no matter if you're listening to music, playing a game or watching a video.

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At first, devices that needed to amplify a signal such as radios and the first, lumbering computers used the vacuum-tube amplifier.

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