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384/32 A/D converter


High-speed asynchronous USB connection. Single-ended stereo input on RCA.
S/PDIF, AES/EBU and Toslink digital outputs. Auxiliary S/PDIF input for bridging.
Selectable input gain 0dB to 65dB. Wide choice of equalization curves in digital domain.
Various filter options (anti-rumble, anti-hiss, MPX). Remote control.
Encased in a stylish aluminium case.


Joplin is a high performance A/D converter capable of handing up to 384kHz sampling rates and 32 bits resolution (USB output).
It features a high speed asynchronous USB input based on the hiFace Two technology, further developped to allow for higher sampling rates.
A comprehensive output set (S/PDIF on RCA, AES/EBU on XLR and optical on Toslink) provide great connection versatility.
Also, an auxiliary S/PDIF digital input on RCA allows for re-using the digital connection used for the Joplin for a digital source,
as well as for redirecting the output from a digital source to a computer which is not provided with an S/PDIF input.
Despite its price, Joplin encopasses a leading edge technology for data handling and processing.
An FPGA is used to provide a seamless connection between the ADC IC and the USB port (both operating in master mode for low jitter reasons),
as well as for a large number of important clock and data routing tasks, not to mention the VU-meter drive.
The analog stage is based on the best PGA (Programmable Gain Amplifier) available on the market, and allows for gain as high as 65dB (equivalment to 0.95mVrms for 0dBFS).
A comprehensive set of equalization curves can be selected, to accommodate all phono formats ever used from 1925 to the present day,
plus eq curves for reel-to-reel tapes with straight output from the playback head.
The small size and stylish look of the Joplin allow for a uninvasive placement in every living space.


Size: 200(w) x 50(h) x 200(d) mm
Weight: 1Kg approx.
Sampling Frequencies(kHz):
44.1, 48, 88.2, 96, 176.4, 192, 352.8*, 384*
Resolution: 16, 20, 24 bit (S/PDIF, AES/EBU, optical, with or without dither), 16, 20, 24, 32 bit (USB, with or without noise shaping)
Frequency response: 10-20kHz +0.1/-0.5dB (fs = 44.1kHz), 10-150kHz +0.1/-0.1dB (fs=384kHz)
SNR: 122dB (A weighted, 384kHz, 32 bits, gain 0dB), 114dB (A weighted, 192kHz, 24 bits with noise shaping, gain 0dB), 100dB (A weighted, 192kHz, 24 bits with noise shaping, gain 40dB)
THD+N: 0.00045% (1.7Vrms in, 192kHz, 24 bits, gain 0dB)
Gain: 0dB, 10dB to 65dB in 1dB steps
Cross-talk: -110dB @1kHz
Inputs: analog single ended on RCA female, S/PDIF on RCA female
Oututs: 1x S/PDIF (RCA female), 1x AES/EBU (XLR), 1x optical (Toslink), 1x USB (USB female Type B)
Input voltage: 1.7Vrms (4.8Vpp @ 0dBFS)
Supply voltage: 15VDC
Supply current: 290mA

*: only USB


   User manual - English (PDF 1,8 MB)       Joplin user manual PrB.pdf      updated 24.09.2012

   Manuale utente - Italiano (PDF 2,1 MB)       Joplin manuale d'uso PrB.pdf      updated 28.11.2013


     Microsoft Windows XP(SP3)/Vista/7/8
(32 and 64 bit)           M2TECH_USBAudio_Driver_r1.6_1.exe      1.3 MB  updated 18.03.2013
     Microsoft Windows XP(SP3)/Vista/7/8
(32 and 64 bit)           M2TECH_USBAudio_Driver_r1.7.0.exe      1.3 MB  updated 29.07.2013


     Guide Lines #1           Application scheme 1.pdf      119 KB  updated 18.10.2012
     Guide Lines #2           Application scheme 2.pdf      111 KB  updated 18.10.2012
     Guide Lines #3           Application scheme 3.pdf      352 KB  updated 18.10.2012
     Guide Lines #4           Application scheme 4.pdf      98 KB  updated 18.10.2012


     White paper on Joplin (PDF 94KB)           white paper on Joplin.pdf      updated 19.11.2012


immagine JPG      computeraudiophile 10/2012 (english)           computeraudiophile     
immagine JPG      hifiwigwam.com 10/2012 (english)           hifiwigwam.com     
immagine JPG      AUDIO 01/2013 (german)           AUDIO     
immagine JPG      Audiophile (thai)           M2TECH Joplin.pdf     
immagine JPG      HFX (english)           http://www.hfx.at/index.php?option=com_content&view=article&id=438&Itemid=206     
immagine JPG      Audiophile (german)           ET. M2 Tech Audio 2013-01_lowres_pdf.pdf     
immagine JPG      AV Mentor (greek)           http://avmentor.gr/reviews/m2tech_joplin_0.htm     
immagine JPG      Best of the Year Awards 2012/2013 (thai)           Best of the year 2012-2013.pdf     
immagine JPG      IHOS 2013 (greece)           http://www.m2tech.biz/public/pdf/Review_IHOS.pdf     
immagine JPG      High Fidelity 2013 (greece)           http://www.m2tech.biz/public/pdf/Review_HighFidelity.pdf     
immagine JPG      Stereoplay.de 05/2013 (german)           Stereoplay_05_2013_Seite_60-61.pdf