Years ago, Questyle embarked on a plan to design a high-resolution portable 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. They looked at it not just as a breakthrough for portable music equipment, but also 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 warm and powerful sound, which makes the QP1R masterpieces of portable DAPs.
Available in Space Grey or Gold finish.
The Questyle Audio QP1R follows the same 3X Clock design of the Questyle Audio CAS192D. The 3X clock USB asynchronous transmission 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 the music.
Satisfy Your Needs for Travel:
The Problem: Transient Intermodulation Distortion (TIMD). Some amplifiers have excellent test specs, but practically, when they process high speed audio signals, their negative feedback amplifier, while working in an open loop, will lose control, which is called transient intermodulation distortion. It lowers the sound quality, making the sound harsh and unpleasant. Some top manufacturers, like Gryphon, PASS and MOON, have been aware of this problem and have adopted the approach of little negative feedback or non-negative feedback to avoid TIMD. However, that either doesn’t solve the problem or is extremely costly. Successfully producing a non-negative feedback amplifier requires a very strict selection of components, with only a 1% or even 0.1% chance of successful matching. Meanwhile, there is the stability issue, which comes along, when amplifiers operate in a non-negative feedback state.
Questyle designers found that some companies had already applied current mode technology to the audio field. For example, Krell was using CAST (Current Audio Signal Transmission) technology for audio transmission, Japanese amplifiers were adopting the SATRI technology BPM7110 module, both of which were non-negative feedback solutions, but, still pioneers of current mode audio circuits. The focus of these technologies was on transmission rather than amplification. The circuit was non-feedback and testing specs were not good. Furthermore, it was not compatible with other equipment, because the interface was pure current mode. So, they decided on a new design to solve the problem: voltage input and voltage output; while having all signal amplification occur in current mode – becoming high-performance and compatible at the same time.
Questyle moves beyond the traditional design employed in many modern amplifiers, to a reinvented voltage-mode circuit-design resulting in a remarkable ultra-low distortion level of less than 0.00038%. This technology is now featured in all Questyle headphone amplifier products.
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 Amplification” technology is merged into a High-Res DAP, allowing the 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 8ohm in ear monitors or 300ohm in 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 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 combine to make a beautiful and stylish enclosure.
The helm style volume control and the machined aluminum hollowed-out protective crown inspired by a fine watch, against inadvertent volume change, and preventing accidental damage to headphone plugs while carried in a pocket or a case.
WMA,WMA Lossless, OGG, AAC, DFF, DSF
PCM Native: 44.1 kHz – 192 kHz（16bit/24bit）
DSD Native: DSD64(1bit 2.8MHz)/DSD128(1bit 5.6MHz)
External: Micro SD card 2*128GB
Via PC USB connection @ 450mA,
Charging Time: 8 hours
Body ：CNC cutting aluminum case, Available in Space Gray/ Gold
Max Output Amplitude: Vout=1.9V rms
Output Power: Pout=40mW @32Ω
Max Output Amplitude : Vout=1V rms
Output Power: Pout=31mW @32Ω
Max Output Amplitude :
Vout=0.53V rms @32Ω
Vout=0.51V rms @16Ω
Output Power: Pout=8.8mW @32Ω