Specification RipAMP 2.1/100

USB 2.0 from RipNAS or Laptop/ PC
2*100W output power (4 ohm)
1 subwoofer output (RCA)
Less than 0.05% THD+N at 25W
Distortion (-2.5dBFS, 8 Ω) <0.09 %
Dynamic Range, a-weighted 103 dB
Signal-to-noise ratio 103 dB
Channel separation 90 dB
Frequency response +/-0.5dB
Audio files from 32-96kHz /16-24bit
5kg weight of brushed aluminium
5cm (h) x 23cm (w) x 24cm (d)


Datasheet / Flyer



Eins-Null 3/2012
„Der RipAMP 2.1 ist ein erstaunlicher, kleiner Verstärker, der jedem Computer und besonders natürlich dem RipNAS gut zu Gesicht steht.“

RipAMP 2.1

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.

Special features:

  • Latest class-D PurePath HD amplifier technology from Texas Instruments
  • All digital signal path - no analog until speaker outputs
  • 2*100W high-quality stereo amplifier
  • USB input with HD audio support 24bit/96kHz
  • Upsampling to 24bit/384kHz
  • Easy install, no driver needed
  • Automatic standby when no music - and on when music returns
  • Self-protection for high power and high temperature
  • Fanless for silent operation


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.

Power stage:
The PWM signals for each channel is connected to the inputs of the power stage, where the PWM signals are internally level shiftet and fed into two sets of N-channel DMOS power transistors. The power stage is designed in a stereo Brigde-Tied-Load (BTL / full H-brigde) configuration, using a ½ H-bridge (one set of transistors) for each of the four speaker connections.

Passsive LC low-pass filter:
The PWM output from the power stage filtered just before the speaker terminals using a second order LC low-pass filter.

Read more about True Digital Audio Power Amplifiers.

Last Updated on Tuesday, 07 February 2012 18:39