Philosophy
Quest has no limits. QPM, the flagship portable lossless player of Questyle, beyond itself once again.The more complicated the world is, the more concise we are. We hope you can enjoy high-quality music in an easy way anytime and anywhere.
Design
Inheriting Questyle’s distinctive design style, QPM is visually impressive for its tucked twist, curved surfaces and smooth lines, as well as a more comfortable grip.
Different from the last two generations of Questyle players, 3D glass is first time used for the front and the rear panel of QPM. By overcoming various challenges of processing, different materials are combined together perfectly, which makes QPM a work of art.
Your Portable Music Hall
The Portable Lossless Audio Player, QPM, can be used independently and loaded with tens of thousands of lossless music files, which will become a music hall in your pocket.
Portable DAC & Headphone Amplifier
In addition, QPM can be used as a DAC for mobile phones via USB connector and it will provide you with significantly improved sound.
Super Source System
QPM can connect with the Super Source System. Simply plug in the Super Source System and press the play button, you can enjoy beautiful music in the simplest way.
Super Source System has a full range of input and output interfaces, supporting digital signals, balanced and unbalanced analog outputs. Besides, Super Source System supports professional interfaces of AES and XLR that are used in recording studios. In the Studio mode, the power level will increase from 14dBu up to 20dBu instantly.
HB2 System
QPM also can connect with HB2 system. When QPM is connected to HB2, the professional analog and digital output interfaces of QPM can connect with any traditional speaker system, match with active speakers or other digital equipment.
Technology
Current Mode Amplification
Global PCT Patent No.: US 9,614,483 B2
Questyle’s patented Current Mode Amplification technology is set apart from other technologies adopted in traditional amplifiers. It will provide users with an experience of being there and listening to the original sound.
QPM uses CA630 and CC630, the pure Class A Current Mode Amplification modules featuring fully discrete structure and SIP (System In Package). Benefit from the SIP process, the output power of QPM increases by nearly a half compared with QP2R, and the quietness increases by two and a half times.
4.4mm Full Balanced
QPM with the High BIAS setting indicated by red light of the BIAS indicator on the side of QPM, the amplifier works in pure Class A state and provides endless energy for the amplifier. Plus the 4.4mm full-balanced output, QPM will give full performance to your headphones and bring you an exceptional listening experience.
Pure Class A BIAS Control
QPM supports pure Class A BIAS Control system. With the High BIAS setting, the output static current doubles, the THD+N and higher harmonic distortion drop to the lowest level, which is like driving a super sport car, just imagine the car is set to "RACE" mode. QPM immediately attains stronger power and quicker responses, enhancing the performance dramatically.
Specifications
Audio Formats Supported: WAV, FLAC, WMA, MP3, OGG, AAC, ALAC, AIFF, DFF, DSF, APE(Normal/High/Fast),
Sample Rate
PCM 32kHz - 384kHz (16/24/32Bit)
DSD Native: DSD64(1Bit 2.8MHz),
DSD128(1Bit 5.6MHz), DSD256(1Bit 11.2MHz)
DAC: AKM AK4490 DAC chip
Outputs: Headphone out(3.5mm)/Optical out(3.5mm) /Full balanced out(4.4mm)
Output Amplitude
3.5mm headphone jack: 1.9Vrms, RL=300Ω; 1.5Vrms, RL=32Ω
4.4mm headphone jack: 3.9Vrms, RL=300Ω; 2.3Vrms, RL=32Ω
Max Output Power
3.5mm headphone jack: RL=32Ω, Po=74mW; RL=300Ω, Po= 13mW
4.4mm headphone jack: RL=32Ω, Po=161mW; RL=300Ω, Po=51mW
Frequency Response: ±0.17dB(20Hz - 20kHz)
SNR: 3.5mm headphone jack: 108dB; 4.4mm headphone jack: 110dB
THD+N
3.5mm headphone jack:
0.00055%@13mW(0dBFS 1kHz@48kHz 24Bit), RL=300Ω
4.4mm headphone jack:
0.00049%@51mW(0dBFS 1kHz@48kHz 24Bit), RL=300Ω
Output Impedance: 0.1Ω
PC OS Requirements for being Used As A Portable DAC: Windows XP & Windows 7 / 8 /10 (32/64bit) / Mac OS X 10.7 or later
Memory
Internal: 64GB;
External: Micro SD card (Max. 2TB) x 1
Battery: 3100mAh, 3.7V Li-Polymer battery, 10 hours of battery life
Display: IPS 2.4” (Sharp LCM)
Operating System: Linux
Body Material: CNC machining aluminum, available in Black, 3D glass
Dimension: 65[W] x 134[H] x 14.5[D] (mm)
