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Questyle Audio adhere faithfully to current-mode amplification at all form factors, and building a 4.4mm balanced output into the M15 just extended the capabilities of their flagship dongle. Headfonia says "M15 offers one of the most sophisticated designs in the industry". ecoustics rate it on par with legacy music players and "would suggest trying it before you pay for anything else". MOONSTAR Reviews echo M15 competes on equal terms as music players. Headphonesty hail it as liquid gold. M15 "managed to wring musicality out of the ESS DAC chip that I frankly did not think possible" praised Headphone Guru. It's easy to hear why, if audible results count to you. Operating in current-mode, audio signal gets passed in current instead of the more standard voltage. The Legend Evo from Empire Ears provides instant synergy, given its 3ohm load. Current-mode amplification eliminates the lag time of the signal that might otherwise occur, as it builds up at the capacitances in the circuit – current signal passes through unhindered as compared to voltage, with speed and ease. [See Product Desc. For More] By doing away with the issue of transmission delay in M15, Questyle virtually eliminates any of the harshness caused by the intermodulation distortion associated with high capacitance, solid-state circuits. Typical of their high-end offerings, M15 decodes digital via its ESS Technology ES9281AC DAC smoothly and organically, without exaggerated warmth or bloat. That small signal then takes advantage of being unhindered by capacitance in the signal path. An added benefit from current-mode amplification is that huge signal bandwidth is possible, leading to phase response being accurately preserved in the human hearing range. Indeed, to hear current-mode is to hear a naturalness to music not encountered before in a conventional circuit, and Questyle build M15 as an affordable entry to such a topology. Happily use with any low-impedance device (current signals excel the closer a load is to ground) such as Rosson Audio Designs, the Vision Ears Elysium EXT, plus CIEM heavyweights Craft Ears and Empire Ears – particularly the latter's Odin and Legend Evo. Driving low impedances is M15's forte. But bridge-tied load balanced operation now means this dongle also doubles voltage swing compared to single-ended operation, to drive higher impedances credibly too. Explore how Questyle's current-mode scheme in CMA15 can further benefit your planar-magnetic headphones at the desk, or browse our other mobile DAC/amps here.
Our Price | $329
Questyle Audio adhere faithfully to current-mode amplification at all form factors, their dedication to this technology extending down to their thumbdrive-sized DAC dongle, the M12. It's easy to hear why, if audible results count to you. Operating in current-mode, audio signal gets passed in current instead of the more standard voltage. This eliminates the lag time of the signal that might otherwise occur, as it builds up at the capacitances in the circuit – current signal passes through unhindered as compared to voltage, with speed and ease. [See Product Desc. For More] By doing away with the issue of transmission delay in M12, Questyle virtually eliminates any of the harshness caused by the intermodulation distortion associated with high capacitance, solid-state circuits. Typical of their high-end offerings, M12 presents detail smoothly and organically without exaggerated warmth or bloat. It easily earned Stereophile's praise for its transparency. Another effect of being unhindered by capacitance in the signal path means that huge signal bandwidth is possible, leading to phase response being accurately preserved in the human hearing range. Indeed, to hear current-mode is to hear a naturalness to music not encountered before in a conventional circuit, and Questyle build M12 as an affordable entry to such a topology. Happily use with any low-impedance device (current signals excel the closer a load is to ground) such as Focal's new line of headphones – Radiance, Celestee and Clear MG – plus Rosson Audio Design and CIEM heavyweights Craft Ears and Empire Ears. // GOOD TO KNOW Current Mode Amplification Smart impedance matching from 8 to 600 Ohms. Ultra low distortion 0.0003% ES9281AC chip (Decodes up to PCM 384kHz/32bit and DSD256) Supports MQA decoding Supports TRRS in-line mic input Gain indicator Data indicator Compatible with Android 5.0 & above and iPhones (Lightning cable not provided) Dimensions: 5.1 X 1.65 X 0.81 cm Output Power: Built-in smart detection circuit will automatically self-adjust the output power to fit different impedance of headphones. RL=16Ω – Po=46.11mW; RL=32Ω – Po=26.71mW; RL=300Ω – Po=12.26mW; When the detected impedance is less than 70Ω, M12 will self-adjust to low gain output. When it is more than 70Ω, M12 will self-adjust to high gain output. When it is more than 600Ω, M12 will automatically switch to 2Vrms line out. // WHAT'S IN THE BOX: 1 x M12 Mobile Amplifier with DAC 1 x M12 description card 1 x Type-C to USB-A Cable 1 x Type-C to USB-C Cable
Our Price | $149
Questyle M15 Case
Dress up and protect your Questyle M15 with a leather case! Comes in Black, Brown or Red!
Our Price | $45
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Questyle Type-C to Lighting OTG Cable
Questyle's Lightning cable for Apple users. ***Please note cable is not MFI-certified.
Our Price | $32
CMA15 celebrates the 15th anniversary of Questyle Audio's inception with the use of ESS Technology's flagship ES9038Pro DAC. ecoustics say the benefits of a natural union of current-mode technologies are audible, placing CMA15 at the top for your consideration as a line source and headphone amplifier. CMA15 packs one of the most sophisticated pure Class A analog stages in a DAC available to market now, the strengths of an ES9038Pro and CMA15's current-mode amplification working hand in hand. CMA15 is alive with tone colour and saturation, notes propelled forth with a real zeal and macro-dynamic force about them. There is a tangible physicality about this Questyle flagship – listeners enjoy a palpable connection hearing familiar music again, as CMA15 heaves and breathes like it were a real, living, being. And still, in a reference DAC where neutrality is so prized, it presents tonal balance accurately. [See Product Desc. For More] In a throwback to Hi-Fi luminary Dan D'Agostino's work [using Texas Instruments] for Krell Industries at the beginning of the 21st century, Questyle designed CMA15's analog circuit path to operate transmitting signal solely in current instead of the standard voltage, starting from its ES9038Pro's 50mA analog current output. Manufacturers have long taken advantage of the ESS flagship's claim to be the most sophisticated DAC chip available, outputting in current for best distortion figures before traditionally voicing the circuit through the crucial I/V current-to-voltage converter stage. But D'Agostino understood then that no I/V stage could completely disappear sonically, colouring the sound artificially in ways unacceptable – he therefore removed the stage entirely, by employing Krell's own current-mode analog circuit. Transmission of signal, entirely in current, without prior conversion to voltage, has been revived by Questyle to the same effect here. Removal of the I/V aspect of CMA15's circuit therefore sees the purest expression ever of Questyle's current-mode philosophy, keeping affairs post-digital conversion magnificently and elegantly simple with fewer parts necessary. Questyle's choice of current-mode signal is the stuff of legend by now. It eliminates the lag time that might otherwise occur when signal is transmitted in voltage, as it builds up at the capacitances in the circuit – current signal passes through unhindered by comparison, with speed and ease. By doing away with the issue of transmission delay in CMA15, Questyle virtually eliminates any of the harshness caused by the intermodulation distortion associated with high capacitance, solid-state circuits. Coloured yet correct, CMA15 presents detail smoothly and organically with a sense of vibrancy that's accurate and still entertaining. Another effect of being unhindered by capacitance in the signal path means that huge signal bandwidth is possible, leading to phase response being accurately preserved in the human hearing range. Indeed, to hear current-mode is to hear a naturalness to music not encountered before in a conventional circuit, and Questyle build CMA15 as the ultimate expression to such a topology. A 4.4mm headphone output, a pure Class A small signal and power stage, and LDAC Bluetooth input, allow users to enjoy CMA15 in ever more scenarios. Current-mode will prove even more effective the closer a load is to ground. The results translate to an ultra-low distortion, linear, analog system in tandem with Class A, without resorting to the excessive use of negative feedback. CMA15 works as a perfect DAC for your Hi-Fi system into component input impedances that have been dropping ever more readily since the turn of this decade. Flip CMA15 to variable volume mode, and its analog potentiometer turns it into an excellent pre-amp. Everything above discusses the less-obvious about a true Questyle flagship, because the plain truth is that CMA15 functions as the perfect headphone amplifier first and Hi-Fi hub second. Check out Questyle's other headphone specialties here, or view our other DACs here.
Our Price | $3,199
The Questyle QP2R is one born of professional descent. Questyle is known for its Golden Reference System which is used in China's largest concert hall, the Xinghai Concert Hall, and in the heart of that music, sits the Current Mode Amplification technology. Users notice an immediate effortless presentation of notes in a dark background. It's liquid, silent, precise. Further, turn on the BIAS control for a smooth drive, and allow the music to flow with richness in tone and clarity of notes. It is a refined, powerful player for the purists. It does not stream, it does not allow WIFI. It waits for the right listener, and then it gives back. The QP2R is reference class for many of our users. It is fully balanced, and its exquisite finish is attributed to the Fanuc CNC machine at Foxconn. For those who do not stream, and are sibilance-intolerant, we recommend anchoring your portable listening with this, or dock it at home with the CMA Twelve Master for an smooth evening of uninterrupted listening. Pour yourself your favourite drink.===Full specifications here.=== Curiosity did not kill the cat. It lead to modernisation. Read about the flagship DAP from Questyle, the QPM, or look back at history to see how it all started, with the QP1R.
Our Price | $1,250
Questyle QP Master
Here comes the Master. Questyle's QPM follows the success of its predecessor, the QP2R. Whilst there is no change in form factor, the QPM instantly switches all background noise to zero, simulating a pitch black room, with full HiFi clarity playing with ease, finesse and control. It's velvety and precise, boasting full Class A amplification, and insisting on true balanced circuitry via its 4.4mm output.The Master is not limited by circumstances nor listening preferences. Choose to use it as a DAC by connecting it to your phone, a standalone portable player, connect it to your car system, or dock it via the CMA Twelve or CMA Twelve Master (read about the Super Source System here). Then sit back to hours of listening through speakers or your favourite pair of headphones. The Focal Utopia has been spotted as a frequent visitor in Questyle setups, and some Utopias stay for good, because a great match made in heaven does not come by every day in our world called audiophilia. Ask to listen to the QPM the next time you visit us.
Our Price | $2,599
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Questyle CMA12 Master
The CMA Twelve was launched to celebrate twelve years since the invention of Current Amplification Technology by Wang Fengshuo (Jason Wang) in his university's lab. // DIFFERENCE BETWEEN CMA Twelve & Twelve MasterThe CMA Twelve Master has a MASTER laser etching, and features a ROGERS Ceramic PCB to ensure the ultimate performance for sound quality and in specifications. // THE QUESTYLE BUILD QUALITY Their manufacturing partner, Foxconn, setting new benchmarks in technological standards. The chassis of the CMA Twelve has very high efficiency for heat dissipation, which ensures it will work with absolute stability in pure Class A, keeping the temperature at 45 degrees. Mechanical vibration will affect audio signal processing and the resulting sound. To avoid resonance, the CMA Twelve chassis is formed from 10mm-thick aircraft-grade Aluminum 6063, with high precision machining techniques of ±0.02mm.// AUDIO LOSSLESS SYSTEMDigital audio signals from your PC, music server, CD or Blu-ray can be sent to the CMA Twelve via AES, SPDIF, Optical or USB. The core patented technologies of Current Mode Amplification, True DSD and 3x Clock Asynchronous Transmission allow the CMA Twelve to offer outstanding performance from its DAC and pre-amplifier. The specially designed ADJ/FIX switch is used to match with power amplifiers and active speakers.>
Our Price | $2,551.12