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The HD25 is the natural digital hub in any audio system. It has four
digital inputs and two analog outputs. The digital inputs can be used to
connect a tablet, computer, streamer, Sonos, cable TV or music center
to your existing audio system. And with greatly improved sound quality.
The HD25 has a built in pre amplifier and a remote control which allow
easy integration with active loudspeaker systems or headphone
amplifiers. Should you lose your remote control, you may switch inputs
by simply tapping on the front panel. If you plan to use it together
with a computer as a source, the HD25 is especially clever. Out of the
box it is very simple Plug & Play. Connect the USB cable and
immediately enjoy high quality sound.
On the technical side, the HD25 borrows a lot of technology from the Hegel Reference products. One of these is the use of silicon germanium transistors. These components add extremely low levels of noise, resulting in unsurpassed levels of resolution and a more natural and pleasant sound. You can also switch between two different digital filters to adjust the sound to your taste. All inputs are impedance matched to minimize distortion due to the quality of the digital cables. In addition, all inputs are galvanically isolated.
OPTIONAL: If you want to explore super high resolution material (24/192) on USB, the HD25 supports this too. You simply flip a switch on the rear panel and install our high resolution driver. All other inputs supports this resolution without any extra drivers.
The USB connector found on Hegel amplifiers and digital to analogue converters opens a whole new world for music and movie lovers. This functionality allows you to easily connect your Hegel product to any computer with a reasonably new Windows or Mac Os operating system installed. The most common Linux systems will also work. The Hegel USB technology is actually a computer sound card, or audio controller if you like. With the Hegel product connected, all sounds usually played through your computer will now be played through the Hegel. This means that, unlike let's say a music streamer, a Hegel DAC will not only play your music files, but also any sounds that come out of the computer, including Youtube videos or Skype chats.
What can it play? The Hegel will, when connected take over all sounds. This means you can play music, video, computer games, internet radio or hear the occasional ding when you press and hold the Windows ANY-key for too long. Everything with superb Hegel sound. The major benefit is noise reduction. Inside a computer you have all kinds of noise generating equipment. And especially the very low-gain analogue signal is very exposed to noise inside a computer. So just moving the sound card out of the computer gives a real benefit. So what is so special about the Hegel sound card? Well, it is not like computer manufacturers have not tried to do their best for years. And many of our competitors have tried doing great separate sound cards too, these last couple of years. The special thing with Hegel is that we do real life experiments. For example we found that the DAC-chip it self only had limited importance. The implementation of it, however, had a major impact on the sound. Compared to any other external USB sound card you will find the Hegel more quiet, more dynamic and with less distortion.
Almost all HiFi CD Players today are using asynchronous upsampling to convert digital audio data to analog audio. Hegel found that using this kind of asynchronous converter technology will convert jitter error into amplitude error, giving less than optimal sound quality. The Hegel CD Players are using a new digital to analog conversion technology called synchronised upsampling. This new technology gives higher resolution and less distortion, giving a high sound quality. The SynchroDAC technology is used together with the Direct MasterClock technology to keep jitter error and digital to analog conversion errors to a minimum. This will give a cleaner sound and a higher resolution than normal CD Player DAC technology.
The syncroDAC converter technology is using true balanced signal processing to preserve highest possible dynamic range and to reduce distortion. Hegel has done a lot of research to be able to design the DAC converter boards in-house to convert the digital audio data into high resolution analog audio from the CDs. To be able to design the CD DAC converter boards in the best possible way requires a lot of deep technical knowledge in the fields of low noise analog electronics, high frequency electronics, signal processing electronics and advanced circuit board layout techniques.
DAC resolution: 32bit / 192 kHz multilevel sigma-delta DAC
0dBFS signal output: 2,5V RMS
Digital inputs: 1*USB soundcard, 2*coaxial and 1*optical S/PDIF
Line outputs: 1 pair of RCA unbalanced, 1 pair of XLR balanced
Frequency response: 0 Hz to 50 KHz
Phase response: Linear Phase Analogue filter
Noise floor: Typically -145 dB
Power supply: Built-in torodial transformer, 30,000 uF capacitors
Output impedance: 22 ohms unbalanced and 44 ohm balanced
Dimensiuni: 6cm * 21cm * 26 cm (H*W*D)
Greutate: 3.5 kg
THD: Typical 0,0006%