This enables the HDVD 800 to transmit the entire frequency spectrum of high-end audio sources without any loss of frequencies.

ENGADGET: Sennheiser unveils HDVA 600 analog headphone amp, asks for $1,600

The HDVD 800 and the HDVA 600 were developed and designed in Germany, and the latest members of Sennheiser's high-end series are also being manufactured there.

ENGADGET: Sennheiser unveils HDVA 600 analog headphone amp, asks for $1,600

In order to fully exploit the sound potential of the HDVD 800 with any audio source, a rotary gain switch at the rear of the unit provides simple adaptation of the amplifier output to the audio input voltage.

ENGADGET: Sennheiser unveils HDVA 600 analog headphone amp, asks for $1,600