mCubed presents the HFX RipAMP 2.1/100. In cooperation with Sumoh Denmark we launch a true digital amplifier. It turns the RipNAS or any Laptop or PC into a Highend Audio Network Player. There is no DAC at all. All the sound is pure digital via USB to the class.d modules of the amplifier.
PurePath Digital Technology(TM) provides clear sound without a DAC, no signal loss and extremely clear and direct sound.
The RipAMP is very easy to install: connect with USB, connect to power and connect to the speaker. Add a remote control like Asset Control, iPAD or any Android Pad.
PurePath Digital Technology - The End of DAC
The technology is based on a pulse-code-modulated (PCM) to pulse-width-modulated (PWM) converter called a modulator. The modulator receives the audio in PCM (I2S) 24-bit audio format with a sample rate depending on the input. In a PCM signal format each sample has a assigned amplitude, see below (left side). PWM format signal (right side) has the magnitude for each sample descriped as a width as oppose to a height in PCM signal. The signal is up-sampled eight times internally (e.g. 8 x 48kHz = 384kHz) and then the modulator converts the signal to PWM with 384kHz switching frequency.
The amplifier selects automatically the sample rate and can run with up to 96kHz. No up or re-sampling is used. To compare, a CD-player uses 44.1kHz and DVD-player 48kHz. CD/DVD players that specify higher sample rates are using up-sampling. The Transporter can run up to 96kHz sample rate depending on audio data. The amplifier accepts digital audio input with a maximum audio sample word length of 24-bits. The modulator also has build in digital audio processing with many possibilities.
Passsive LC low-pass filter:
Read more about True Digital Audio Power Amplifiers.