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Audiophile sound anywhere you are .......

The second generation of R-2R USB/SPDIF portable DAC is available

This portable USB DAC have really R-2R multibit multiplying current-output DAC chip. This full size chip LTC2753 from Linear Technology Corporation have exceptional precision characteristics and use for avionic, medicine and science precision electronic. The choose this chip instead of usual NOS like PCM1704 or sigma-delta chips, allow us to achieve maximum fidelity of audio signal and therefore the sound of this DAC is really to hook and to nail. A nuances of sound sometimes verge to revelation. And the sound indeed fill of energy of music performance. Though for nuances hear you need a top range of headphones, or top - 1. With top line of headphones, a listener can to check of track record and to find all faults of audio mastering mix even. The most unbelievable idea is that little enclosure have sound performance as some or even better then it big AC-socket's brothers DAC + HPA from 5K-20K $ range. And this is not joke. Externally the DAC is seem a laconic. No buttons, no lights. But be sure all the to need for quality sound are include it, following our motto "world's maximum by hardware resolution" . The last technology of semiconductor market together with absent of unwanted LED lights allow us to make this DAC so efficient that can to avoid to implement of internal battery, and remove all worrys by charging it from your mind. This DAC don't custom driver required and supports by Windows, Mac OS-X, Linux, iPad/iOS and Android from 5.0 operated systems by native. The relocation this DAC unlimited almost and allow you to listen a perfect music anywhere. You can migrate from lounge to bedroom or to garden, anywhere perfect music will stay with you, and certainly out of home . The headphone amplifier (HPA) it device is especially strong, relative other portable audio devices. By one hand it allow to performance all kind of music, from wall of sound of metal to nuances classic or vocal. By other hand it take next complicated. We produce a 4V peak-peak output and 6V peak-peak output versions. For 4V we recommend to use a 16-100Ω headphones range , appropriately for 6V version we recommend to use a 50-150Ω headphones. This different voltage output to give to achieve most best signal/noise rating and take to you more comfortable volume adjustment. (Note: A output of regular portable audio is 2.1 Vrms or 3 V peak-peak)

The portable USB R-2R multibit DAC can to play all type of audio-video files, any bit resolution, any sample rate THAT can performance the media player on your PC/Laptop/Tablet/Phone.

You can connect portable USB DAC to PC/Laptop via USB cable ((A - mini B) or (A - micro B)) direct or through external USB hub.

You can connect portable USB DAC to Tablet/Phone via any USB On-the-Go (OTG) cable + ((A - mini B) or (A - micro B)) or direct micro-B to micro-B USB cable. For reduce power consumption from Tablet/Phone, you can connect your Tablet/Phone to the DAC through external USB hub.

General description portable USB R-2R DAC
Chip precision 16 bits
Input Either
DO NOT use simultaneously!!!
Output = Audio Headphone 3.5 MM AUDIO JACK
Sampling Frequency USB 44.1 KHz,48 KHz
Power consumption no load -- 0.575Watt (5V * 0.115A)
with load -- 0.6Watt (5V * 0.12A) , the load is full size headphone 32 Ω, the volume as average for listen
Dimensions WHD 73 x 26 x 118 (mm) = 2.9"/1"/4.7"
Net weight 0.15 kg = 5.3 OZ
Power supply USB 5V/0.5A

Maximum output power Headphone, each channel
Note: Some Tablet/Phone decrease level of signal by software internally for external USB audio.
Impedance of Headphone DAC 16bit 4V peak-peak output DAC 16bit 6V peak-peak output
16 Ω 250mWpeak(175mWrms) 563mWpeak(394mWrms)
20 Ω 200mWpeak(141mWrms) 450mWpeak(315mWrms)
32 Ω 125mWpeak(88mWrms) 281mWpeak(197mWrms)
50 Ω 100mWpeak(70mWrms) 180mWpeak(126mWrms)
100 Ω 40mWpeak(28mWrms) 90mWpeak(63mWrms)
150 Ω 27mWpeak(19mWrms) 60mWpeak(42mWrms)
200 Ω too soft (though beyerdynamic T70/250 ohms, sennheiser HD800 and audeze LCD-4 is drive with margin ... ???) 45mWpeak(32mWrms)

The price of USB R-2R DAC 16bit -- 350 €

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