Quloos MC01/MC01se Portable USB DAC/AMP

The so-called "pursuit of details in small size"

In spite of small size, high-density and thick sound can also be offered
Three Power Filters Optional
Ultralow Noise & Ultrahigh PSRR
Ultralow Noise & Ultrahigh PSRR
Ultralow Jitter Crystal RMS Jitter 150fs
Philips Electrolytic Capacitor @MC01se
Panasonic Film Capacitor
Dual Flagship CS43131 DAC Chips
High-Power Amplification Chips
100 Steps Separate Volume Control
Advanced 2x6 Layers of PCB Design
Low-Power MCU Management
Powerful Output
THD+N 0.0001X%@Balanced
Dynamic Range 131dB@Balanced
S/N 131dB@Balanced
Ultra-low Noise Floor
Support DSD256
PCM 32Bit / 384kHz
Switch UAC1.0 Model
Multi-OS Supported
OLED Display Screen
4.4 Balanced Socket
From Pentaconn Japan
MC01-3.5mm Single-
Ended+4.4mm Balanced
MC01se-3.5mm
Enhance Single-Ended
How to choose the versions

MC01 for balanced port earphones.

MC01se for single-end earphones.

For both balanced and single-end earphones.

1.MC01 can be achievable in most cases.

2. Both MC01 and MC01se are recommended for users who are used to single-end, and have rich listening experience.

Design idea

MC01 provides both 3.5mm single-end and 4.4mm balanced headphone outputs. It utilizes only half of the dual decoding chips for the 3.5mm single-end output.

The balanced port of MC01se has been cancelled. With the parallel output of two DACs, the 3.5mm single-ended output can be served by both DAC in four ways. Also without the balanced output, there is more room to optimize the single-ended sounds.

To make the single-ended sounds convey a higher sense of depth and stereo perception, the gain of MC01se headphone amplifier has been triply increased. However, signal amplification will simultaneously increase distortion and noise, so the test parameters showed a bit poor.

Style of sounds

The previous prototype is similar to QA361 regarding the style of sound, focusing on a sense of depth, the transparency and clarity of sounds.

The apparatus finally put into mass production enhanced the atmosphere with higher sound density. Sound tends to be relaxing and generous like those of QA360LE based on the sound tunings of QA361. But in terms of imaging, it's a bit like those good-quality magnetic tape devices in early days and conveys a sense of heaviness and solidity.

Power supply is the origin of sound

Three power filters optional

In order to secure pleasant sounds provided by MC01 with all of the devices equipped, a triple LDO (with triple power filtering settings) is optional on the menu designed for the power supply on key position. Theoretically, it can achieve a high PSRR, up to hundreds of dB.

Low-noise LDO chips, such as LT3042 and ADM7170.

Clock is the essence of sound

A good crystal oscillator produces a stable sound

In order to produce a more accurate sound, the audio crystal oscillator of MC01 has been selected among dozens of models/brands. Finally, the high-precision femtosecond crystal oscillator with only 150fs of nominal jitter has been used.
Measurement based on the audio analyzer APX555
The adjustment of sound style is the basis of sounds

The final sound effect depends on the adjustment of tunings

After the sound tunings determined, most of the electronic components used inside have been reselected based on performance and sound, to confirm the brand, model and parameter.

Compatible with multiple devices

MC01 supports Android smartphone and PC, iPhone and Ipad, computers installed with Mac or Windows, Switch and many other Hi-Fi music players with USB OTG outputs.

Dual flagship DAC chips

MC01 has lower distortion than the theoretical value DAC given

With two flagship CS43131 chips, MC01 provides better sound quality.

Flagship dynamics

With the background noise reduced to as low as 1.2uVrms at the balanced output and the SNR up to 131dB, the background noise can hardly be heard even if it's connected to any earphone with high sensitive.

Measurement based on the audio analyzer APX555
Design goals

Favorable parameters and better sound!

Try to be irreplaceable in terms of audio impression (And this is the key of product value)

Introduction of buttons and interfaces

Display content

Game experience

Precise sound localization plays a vital roles when playing

In games, except for the experience of images and high-speed, sounds also play a very important role. It will bring such a game experience that sounds are in sync with pictures and the footsteps.

Product parameters
MC01 MC01se
4.4mm Balanced 3.5mm Single-Ended 3.5mm Single-Ended
Net Weight 25.4g 24.6g
Dimension 62.0(L) x 22.0(W) x 13.5(H)mm
Chassis CNC Aluminum
USB Port Typc-C USB Audio Input
HP Port 4.4mm Balanced + 3.5mm Single-Ended 3.5mm Single-Ended
Control Volume +/-, High/Low Gain, 3 kinds Power Filters, 5 kinds Digital Filters
DSD Decoding 2.8224MHz (DSD64), 5.6448MHz (DSD128), 11.2896MHz (DSD256), Native or DoP
PCM Decoding 16 / 24 / 32Bit, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz, 384kHz
USB OS UAC2.0 / UAC1.0 Windows MacOS Android iOS ipadOS
DAC Chips Dual Flagship CS43131,QFN package
AMP Chips High-Power AMP Chips x 2 High-Power AMP Chips x 1
Gain setting Menu setting: High / Low
Power consumption
(Vol 50, 16bit 44.1kHz)
5V 105mA@3.5mm 5V 115mA@4.4mm Add 4mA to P-High Add 3mA again to P-Highest
Freq.Response 20Hz - 20kHz 0.5dB
THD+N
(Unweighted, no load)
0.00012% 0.0002% 0.0003%
SINAD
(Unweighted, no load)
118dB 114dB 110dB
SNR
(A-Weighted)
131dB 118dB 117dB
Dynamic Range(A-Weighted) 131dB 118dB 117dB
Crosstalk(no load) -141dB -131dB -126dB
Crosstalk(32 ) -92dB -72dB -72dB
Lineout Level
( 0.1V)(Vol:100)
4.0Vrms (High)
1.4Vrms (Low)
2.0Vrms (High)
0.7Vrms (Low)
2.0Vrms (High)
0.7Vrms (Low)
Max Output 260mW@32 54mW@300 130mW@32 130mW@32
Noise Floor (A-Weighted) 1.2uV 2.4uV 3uV

Accessories: USB C to C cable, Lightning to C cable USB A to C adapter, User Manual.
Price: MC01 US $249.99 (Not included shipping), MC01se US $239.99 (Not included shipping)