General Specifications
Name/Model DM13 Hardware solution SoC:  CS6137, Op-amp:  SGM8262*2, DAC:  CS43198*2
Output mode PRE OUT/USB OUT/SPDIF OUT/BLUE OUT Color Silver, Black, White, Red, Transparent cover
Dimensions About 137.5x144.7x28.7mm Weight About 450g
Display 1.5-inch LCD Volume control Physical button
Bluetooth transmission Supports SBC/aptX/aptX Low Latency/aptX HD CD mechanism Custom mechanism
Laser pickup Custom laser pickup Adaptive impedance PO:  8~150Ω, BAL:  8~350Ω 
Buttons and Ports
Buttons and Ports Physical buttons (Power on/off*1+ Play/Pause*1 + Previous track*1 + Next track*1 + Volume up*1 + Volume down*1 + Multifunction button*1) USB Type-C USB*2 (POWER IN*1+USB AUDIO*1, charging/data transfer)
Headphone output Standard 3.5mm port Single-ended line output Standard 3.5mm port
Balanced headphone output Standard 4.4mm port Balanced line output Standard 4.4mm port
Coaxial/Optical output Standard 3.5mm port (shared LO) Slide switch ESP switch*1+D.MODE switch*1
Power Supply Parameters
Power supply DC 5V/≥2A Charging time About 2.5h (5V 2A adapter)
Battery life and test conditions
3.5mm headphone out: ≥10h
Audio input Local CD playback ESP switch OFF
Volume level 32 D.MODE switch OFF
Display status OFF Load 32Ω
4.4mm headphone out: ≥10h
Audio input Local CD playback ESP OFF
Volume level 26 D.MODE switch OFF
Display status OFF Load 32Ω
Audio Parameters
Parts of performance and parameters of headphone output 
  Output power L+R≥270mW+270mW (16Ω, THD+N<1%) Output impedance <1Ω
L+R≥180mW+180mW (32Ω, THD+N<1%) THD+N ≤0.0025% (1kHz/0dB@32Ω)
L+R≥20mW+20mW (300Ω, THD+N<1%) SNR ≥120dB (A-weighted)
Crosstalk ≥77dB (1kHz@32Ω) Noise floor ≤2.4μV (A-weighted)
Frequency response 20Hz~20kHz: attenuation<2.3dB Peak output voltage 7Vp-p
Parts of performance and parameters of line output
THD+N ≤0.0026% (1kHz/0dB@10kΩ) SNR ≥113dB (A-weighted)
Crosstalk ≥105dB (1kHz@10kΩ) Noise floor ≤4.3μV (A-weighted)
Frequency response 20Hz~20kHz:  attenuation<2.3dB Line output level 2.5Vrms
Parts of performance and parameters of balanced headphone output 
Output power L+R≥620mW+620mW (16Ω , THD+N<1%) Output impedance <1.5Ω
L+R≥660mW+660mW (32Ω, THD+N<1%) THD+N ≤0.0024% (1kHz/0dB@32Ω)
L+R≥80mW+80mW (300Ω, THD+N<1%) SNR ≥124dB (A-weighted)
Crosstalk ≥120dB (1kHz@32Ω) Noise floor ≤2.8μV (A-weighted)
Frequency response 20Hz~20kHz: attenuation<2.3dB Peak output voltage 14 Vp-p
Parts of performance and parameters of balanced line output
THD+N ≤0.0022% (1kHz/0dB@10kΩ) SNR ≥124dB (A-weighted)
Crosstalk ≥106dB (1kHz@10kΩ) Noise floor ≤3μV (A-weighted)
Frequency response 20Hz~20kHz: attenuation<2.3dB Line output level 5Vrms

 

Test conditions: Full volume, local CD playback, -5dB sinusoidal signal, headphone out/balanced headphone out/LO/balanced LO (32Ω load)