SPL Marc One


Monitor Controller and 2x2 Audio Interface

  • Monitor controller with 2 outputs for connecting two pairs of speakers (A / B)
  • Output A with additional subwoofer out
  • Off switch for the monitor section
  • 1 Stereo TRS jack input and 1 stereo TS jack input
  • Stereo TS jack Line Out loops the selected signal through unchanged
  • Three monitoring modes: stereo, mono and L / R> R / L (reverses the stereo image from L / R to R / L)
  • Infinitely adjustable crossfeed function - crosstalk between the two stereo channels for a more realistic surround sound
  • Stereo headphone output
  • Interface with 32 bit AD / DA converter
  • Sampling frequencies up to 768 kHz PCM
  • DSD playback up to DSD4 or DSD256
  • Latency-free monitoring
  • Class Compliant Interface for Mac and IOS
  • System requirements Windows: Win 7, 8 and 10
  • Dimensions: 210 x 49.6 x 220 mm
  • Weight: 1.55 kg
available since November 2020
Item number 505344
sales unit 1 piece(s)
Recording / Playback Channels 2x2
Number of Mic Inputs 0
Number of Line Inputs 4
Number of Instrument Inputs 0
Number of Line Outs 2
Headphone Outs 1
Phantom power No
Number of S/PDIF Connectors 0
Number of ADAT Connectors 0
Numer of AES/EBU Connectors 0
Number of MADI Connectors 0
Ethernet 0
Other Connectors No
MIDI interface No
Word Clock No
Max. sample rate (kHz) 768 kHz
Max. resolution in bit 32 bit
USB Bus-Powered No
Incl. power supply Yes
USB Version 2.0
Width in mm 210 mm
Depth in mm 220 mm
Height in mm 49,6 mm
Connection Format USB port Type B
Number of stereo channels 2
Number Of Monitoring Outputs (Stereo) 2
Headphone connection 1
Amount Of Inputs 2
Built-in AD / DA converter 1
Number of 2 track inputs 0
Design Desktop
Dimensions 210 x 49,6 x 220 mm
Weight 1,6 kg
Included in delivery Power Supply
Zero latency monitoring 1
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Works on modern Linux
Ron Hilbolling 07.07.2022
The initial impression while opening the box is excellent seeing it packed in anti static foam. Beforehand i was slightly nervous to hook the SPL monitor controller up to a Linux computer.
When compared soundwise with a standard internal sound card or a top-selling external box it stands out because the Marc One sounds like music should sound. Another big plus is the availability of both balanced and unbalanced connections. Hence even a DI-box is included, albeit an expensive one. The cable from the switching power supply is a bit short. The box can get a bit warm, not hot, when placed inside a cabinet together with other components. The lack of a remote control can be difficult in some use cases, however i use the one from my integrated amplifier.
There was no mention anywhere if this machine would work on Linux. No doubt it was immediately recognized and available. Software wise (Alsamixer) there were no controls, so no one can mess with that.
After two days of using the machine in a simple setting i am pleased with its performance, although given SPL's rep i didn't expect anything else. I expect it to function above normal in a more difficult environment such as hardware and DAW combined or anything you can throw at the Marc One.


Great Converter
Anonymous 14.11.2022
Sounds is fantastic and satisfied in professional results,


not a good value for money
mariusluk 12.05.2021
At this price you wold expect very good quality both audio and build. None is the case here. the sound is good but very digital sound like(the sounds of the instrument a not natural they finish very abruptly) the sound stage front to back is not well represented the sound is stuck to the speakers(Focal Solo 6 BE). I compere with Arturia AudioFuse(V1) and is no contest in build quality, features, price and sound reproduction, for Audiofuse


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ALPHABLOCK 11.03.2021
Ich bin restlos begeistert von diesem Controller/Interface.

Übersichtlich, effizient, direkt zugänglich und nicht überladen. Vor allem keine nervigen, virtuellen Mixer inklusive wackeliger Treiber - alles mechanisch! Es ist eine Freude damit zu arbeiten.

Im Grunde genommen hat der Marc One alles, was man braucht, wenn man (vordergründig mit virtuellen Instrumenten) produzieren, mixen oder mastern möchte. Die 2 exzellenten Eingänge reichen, um nur hin und wieder einmal einen Synth oder via PreAmp etwas aufzunehmen. Zwei Monitor-Wege reichen im Alltag locker aus. Einziger Wermutstropfen ist, dass der 2. Stereo-Ausgang nur unsymmetrisch ist. Jammern auf sehr hohem Niveau.
Der DA-Wandler ist der vorzüglich. Auch hohe Samplefrequenzen schafft der „kleine Schwarze“ spielend mit geringer Latenz (zumindest für einen Keyboarder). Kein Vergleich zum vorher genutzten Focusrite Scarlett 18i20 Gen2.

Druckvoll (sowohl in den Eingägen wie in den Ausgängen), detailreich über das gesamte Frequenzspektrum, kein Rauschen.

Verarbeitung: „Build like a tank“
Alles sitzt perfekt, nicht zu straff - aber schwergängig genug, um nichts zufällig zu verstellen. Die Kippschalter rasten satt.

Klare Empfehlung, wenn es nicht darum geht, viele analoge Signale aufzunehmen oder abzuhören.