Three years ago, Questyle sparked upon a plan to design a high-resolution portable digital music player (DAP). For their first DAP, they set themselves an almost impossible goal. That was, to make it possible, for true music lovers and professional audiophiles, to enjoy the same Hi-Fi listening experience achieved in state of the art home based systems, in a portable body. This means, the circuit design, the device, the system architecture, as well as, the industrial design and processes, must all be reconsidered. Questyle looked forward to the challenge, not just for portable Hi-Fi equipment, but, as the future of Hi-Fi itself.
An impressive arc body with a twin steering wheel design, supporting DSD128 & 24/192kHz PCM files, pure class A, discrete transistors and components, headphone amplifier, incorporating Questyle Audio’s patented “Current Mode Amplification” to ensure a warm and powerful sound, which makes the QP1R one of the masterpieces, yet one of the most affordable of portable DAPs.
The arc body of the Questyle QP1R is so elegant. A machined aluminum body is merged with a Gorilla glass front and back, reducing weight while increasing durability and providing a better environment for EMI sensitive circuits. The innovative continuous whole surface design, the hollow guard, the curved glass machining, the assembly of superimposed surfaces of glass and aluminum composite materials, the CNC machining and assembly to a severe test of specification, all of which are combined to make a beautiful and stylish enclosure.
The Questyle Audio QP1R’s support covers ALAC, APE, FLAC, AIFF, WAV, WMA Lossless up to 24bit/192kHz and high-Res audio files such as DSD128 and DSD64 playback reveal far much more of the original sound performance of music than that of Mp3 players or smart mobile phones. As a hi-end portable DAP, it needs to show off the audio tracks which are as high level as the studio recordings, with very low power consumption. After many revisions, optimizations for system operation, player programming, and digital audio circuit were tweaked and chosen, Questyle Audio ultimately achieved a solution.
The Questyle Audio QP1R follow the same 3X Clock design of the Questyle Audio CAS192D. The 3X clock USB asynchronous transmisstion guarantees a more stable and precise operation. The three-clock integrated circuit with FIFO asynchronous structure and three voltage-stabilized power stages ensure accurate sound. With Cirrus Logic flagship DAC (CS4398) chips, the DAPs are able to capture more details hidden within music.
In this era of fierce competition between High-Res DAPs and Hi-End smart phones, using Questyle Audio’s highly regarded flagship headphone amp, the CMA800R as a reference and merging “Current Mode Amplificaton” technology is merged into a High-Res DAP, allowing QP1R to drive virtually any headphone. Hi-End audio amplifiers are traditionally designed using all discrete components. At no spared effort and expense, this design protocol is applied to the Questyle Audio QP1R and is combined with Questyle’s “Current Mode Amplification” PCT patents, and an all class A architecture. Such a design with output impedance of less than 0.19 ohms makes it easy to drive whether 8 ohm in-ear monitors or 300 ohm dynamic headphones. For headphones of low impedance especially lower than 36ohms, low gain mode is recommended; for headphones of high impedance, high gain mode is recommended.
The helm style volume control and the machined alumnium hollowed-out protective crown are inspired by a fine watch, designed to prevent inadvertent volume change, and preventing accidental damage to headphone plugs while carried in a pocket or a case.
Another feature is the “Steering Wheel” control for menu, allowing a quick track selection of the QP1R.
A maximum storage capacity of 288GB (32GB internal memory is supplied) means hundreds of albums in your pocket, and two swappable micro SD cards take your whole music collection along with you.
The Questyle QP1R is available in: Gold
- Patented “Current Mode Amplification” in headphone AMP, all discrete components, Pure Class A circuit.
- File Format Support：WAV, FLAC, ALAC, APE, AIFF, ADPCM, LPCM, MP3,WMA,WMA Lossless, OGG, AAC, DFF, DSF
- Sample Rate：PCM Native: 44.1 kHz – 192 kHz（16bit/24bit）DSD Native: DSD64(1bit 2.8MHz)/DSD128(1bit 5.6MHz)
- DAC：Cirrus Logic CS4398
- Output：3.5MM headphone output, 3.5MM line out & optical output
- Frequency Response: 20Hz-20 kHz（±0.1dB）
- QP1 R THD+N = 0.0006%
- Output Impedance ：
- QP1R: 0.15Ω
- Memory：Internal: 32GBExternal: Micro SD card 2*128GB
- Battery：3300mAh Li-polymer， 8-10 hours
- Headphone AMP Output Power
- Gain = HighMax Output Amplitude: Vout=1.9V rmsOutput Power: Pout=40mW @32ΩPout=12mW @300Ω
- Gain=MiddleMax Output Amplitude : Vout=1V rmsOutput Power: Pout=31mW @32ΩPout=3.5mW @300Ω
- Gain=LowMax Output Amplitude :Vout=0.53V rms @32ΩVout=0.51V rms @16Ω
Output Power: Pout=8.8mW @32Ω