Questyle CMA 800R Headphone Amplifier
Questyle CMA 800R Headphone Amplifier
Bleeding Edge Innovation
What happens when you take some of the best audio engineers in the world, have them make a company, and spend six years working on a revolutionary headphone amp design? You get Questyle’s CMA 800R, the bleeding edge of audiophile headphone amplification. The CMA 800R utilizes Current Drive Amplification, a form of signal processing that produces pure linear amplification with perfect resistance matching and less distortion than any other design.
Review to End All Reviews
These following sections are written by expert Head Fi-er - project86

Click here for a full explanation of how the circuitry works
Head Fi Questyle CMA800R Circuit Explanation

Click here for the conclusion
Head Fi Questyle CMA800R Conclusion

Click here to read the review on Head Fi
Full Review
Divine Sound
After a week of listening to the CMA 800R, using the Yulong DA8 as a source, we’re confident in saying this is the best dedicated headphone amp we’ve demo’d. Everything else pales in comparison. It’s difficult to describe, imagine everything you like about your favorite headphones, then imagine they do all those things much better. The CMA 800R, with it’s effectively automatic impedance matching, synergizes perfectly with every dynamic headphone we’ve tried (Denon D7000, Sennheiser HD650, 600, Beyerdynamic T90p, T5p, and T1). This amp adds a new dimension of clarity without impacting your system’s sound signature. The audiophile world is a better place thanks to Questyle.
Ridiculous Versatility
The CMA 800R features both unbalanced and fully balanced inputs along with unbalanced headphone outputs, and a single 3-pin balanced (neutrik XLR jack) output. What are you going to do with a single 3-pin XLR output? Buy two CMA 800R's and use them as monoblock amps. Yup, that single balanced input in the back goes straight to the single balanced output on the front. Given this, you can start with one CMA 800R and use it as an unbalanced amp, then graduate to dually balanced audio with a second CMA 800R. Finally, this amp also has RCA pre-amp outputs. Between the unique circuit design, input variety, and output variety, this amp is ready to improve your setup regardless of configuration.
Specs
  • Gain: 15.5dB
  • Max output amplitude: 7Vrms
  • THD+N: 0.0004% @ 1 kHz, 20mW/300¦¸load
  • SNR: 120 dB
  • Frequency response: DC-650kHz (-3 dB)
  • Input sensitivity: 1.2Vrms
  • Input impedance: 10K Ohms
  • Input interface: a group of XLR or RCA, panel switch is switchable
  • Output interface: 2 standard stereo headphone jacks of size 6.5
  • Working state of output stage: pure class A
  • Main power voltage: 100-120V or 220-230V, internal switch is optional
  • Power consumption: 13W
  • Max external dimension: 330*300*55 mm
Bleeding Edge Innovation
What happens when you take some of the best audio engineers in the world, have them make a company, and spend six years working on a revolutionary headphone amp design? You get Questyle’s CMA 800R, the bleeding edge of audiophile headphone amplification. The CMA 800R utilizes Current Drive Amplification, a form of signal processing that produces pure linear amplification with perfect resistance matching and less distortion than any other design.
Review to End All Reviews
These following sections are written by expert Head Fi-er - project86

Click here for a full explanation of how the circuitry works
Head Fi Questyle CMA800R Circuit Explanation

Click here for the conclusion
Head Fi Questyle CMA800R Conclusion

Click here to read the review on Head Fi
Full Review
Divine Sound
After a week of listening to the CMA 800R, using the Yulong DA8 as a source, we’re confident in saying this is the best dedicated headphone amp we’ve demo’d. Everything else pales in comparison. It’s difficult to describe, imagine everything you like about your favorite headphones, then imagine they do all those things much better. The CMA 800R, with it’s effectively automatic impedance matching, synergizes perfectly with every dynamic headphone we’ve tried (Denon D7000, Sennheiser HD650, 600, Beyerdynamic T90p, T5p, and T1). This amp adds a new dimension of clarity without impacting your system’s sound signature. The audiophile world is a better place thanks to Questyle.
Ridiculous Versatility
The CMA 800R features both unbalanced and fully balanced inputs along with unbalanced headphone outputs, and a single 3-pin balanced (neutrik XLR jack) output. What are you going to do with a single 3-pin XLR output? Buy two CMA 800R's and use them as monoblock amps. Yup, that single balanced input in the back goes straight to the single balanced output on the front. Given this, you can start with one CMA 800R and use it as an unbalanced amp, then graduate to dually balanced audio with a second CMA 800R. Finally, this amp also has RCA pre-amp outputs. Between the unique circuit design, input variety, and output variety, this amp is ready to improve your setup regardless of configuration.
Specs
  • Gain: 15.5dB
  • Max output amplitude: 7Vrms
  • THD+N: 0.0004% @ 1 kHz, 20mW/300¦¸load
  • SNR: 120 dB
  • Frequency response: DC-650kHz (-3 dB)
  • Input sensitivity: 1.2Vrms
  • Input impedance: 10K Ohms
  • Input interface: a group of XLR or RCA, panel switch is switchable
  • Output interface: 2 standard stereo headphone jacks of size 6.5
  • Working state of output stage: pure class A
  • Main power voltage: 100-120V or 220-230V, internal switch is optional
  • Power consumption: 13W
  • Max external dimension: 330*300*55 mm

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