The Questyle QP2r is a sonic tour-de-force that fits in your pocket! With sound that can compete with quality desktop rigs, the QP2r is the audiophile's choice for single-box portable audio.
This is my (Dan's) favorite portable audio player for a great reason; the current mode amplification works superbly with all our planar headphones. The QP2R inherits Questyle's Current Mode Amplifier built with all discrete circuit and operating in a pure Class A working state but implemented as a fully-balanced output. The amplifier circuits are deployed in four groups that work as "out of phase" pairs to decrease distortion, enhance clarity and increase resolution. The four amp circuits are located on both front and back of the PCB, which significantly shortens the distance that signals bypass on the PCB, improving audio performance to deliver an astoundingly low 0.0005% THD with less than 0.1Ω output impedance.
DAN'S MINI REVIEW
I travel a lot, and have always struggled with the limitations of many portable products on the market. There are some fantastic DAC/Amp combos, but you need a source, and hence you have multiple boxes and cables that are definately not "pocket friendly." Some single player devices offer great convenience, with support for streaming services such as Tidal, but in our experience the affordable units struggled either with software issues or simply having enough juice to power a planar headphone. One product I used to use a lot was the QP1r, but I was always put off by the usability of the "wheel" as it was implemented.
Enter the new Questyle QP2r which has addressed the "wheel" usability concerns of the QP1r and has dramatically enhanced the audio quality, making it my new favorite all-in-one portable audio player.
On to the sound, the most important part: the QP2r's balanced output delivers a surprisingly resolving and transparent delivery that is detailed, fun and immersive. The overall impression the QP2r leaves me with every time I use it is that it's remarkably coherent and spacious with a deep, three dimensional soundstage, something I often find absent in portable gear. Further, it lacks that over-etched solid state sound so many portable devices have, that perhaps can deliver "detail" but fails to sound musical. The QP2r just gets it right, it's a superb sounding portable device that's supremely musical, emotionally engaging, and yet is still practical for every day use.
When paired with the AEON Flow or ETHER Flow series headphones, well recorded music has a remarkably smooth, clean and open sound with a very impressive soundstage, making this an exceptional device for all-around fun.
Things to be aware of? First, if you like to really play it loud (as in levels that will harm your ears) the amp will run out of steam and start clipping. It's obvious when it does. It's never been an issue to me.
Second, the UI is functional but since it's not a touch-screen it is a bit more "old school" than touch screen systems, and it doesn't support streaming audio. That said, the UI is perfectly serviceable and easy to use, and the new navigation wheel is a nice upgrade from the QP1R. For myself, that's a small price to pay for the sound quality.
Audio Formats Supported:
WAV, FLAC, WMA, MP3, OGG, AAC, ALAC, AIFF, DFF, DSF, APE(Normal/High/Fast)
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) / Balanced out(2.5mm)
Output Level: Unbalanced 1.8 Vrms / Balanced 3.6 Vrms
Output Power: Unbalanced RL=32Ω, Pout=38mW; RL=300Ω, Pout=9mW
Balanced RL=32Ω,Pout=70mW; RL=300Ω, Pout=38mW
Frequency Response: ±0.1dB (20Hz-20kHz)
S/N 100dB @ 1kHz, Unbalanced / 102dB @ 1kHz, Balanced
THD+N 0.0006% @ 1kHz, Unbalanced / 0.0005% @ 1kHz, Balanced
Output Impedance: 0.1Ω
Charging & Data Transfer: TYPE-C , 5V 2A (PC & MAC)
PC OS Requirements: 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: 3,100mAh 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 Gold/Space Gray
Dimension: 65[W] x 134[H] x 14.5[D] (mm)