Questyle Audio Savings For a limited time, save $500 dollars off the Questyle Audio CAS192D DAC and CMA800R Headphone Amplifier. Questyle Audio CMA800R Headphone Amplifier - SAVE $500 Questyle Audio CMA800R Current Mode Headphone Amplifier is a dedicated quest for perfect sound. The flexibility to add a second unit to operate in True Mono Balanced operation makes this amplifier as flexible as it gets in the realm of Headphone amplification. Strong, powerful and controlled are the thoughts this amp brings to mind. Let's not forget it can also be used as a wonderful Preamp as long as you have only one...