**7.1-channel Hi-Fi quality sound card with 124d B SNR clarity, top-notch headphone amplifier & premium TCXO clock source**
- Industry-leading 124d B SNR (signal-to-noise ratio) audio quality inherited from the revolutionary & widely-acclaimed Xonar Essence ST/STX
- Ultra-low jitter with premium TCXO clock source
- Clean & consistent power supply thanks to high-fidelity low-dropout (LDO) regulators & WIMA® capacitors for uncompromising sound
- Top-notch headphone amplifier supports up to 600ohm-headphone impedance with additional gain for in-ear monitors (IEMs)
- Exclusive op-amp swap kit
Includes:: three op-amps & tool for easy tone tuning
- Celebrated MUSES op-amps deliver true-to-life musicality
- Ultra-fidelity (120d B SNR) 7.1-channel output via the exclusive daughterboard ** Keeping the audiophile spirit & philosophy alive** Four years after the debut of Essence STX -- the long-term holder of the number-one position in Head-Fi's Sound Cards segment, as voted by highly-satisfied users globally -- ASUS remains committed to delivering ever better high-end sound cards to delight the most demanding audiophiles. Drawing on years of experience in developing Essence One, Essence STU & Essence III, Essence STX II delivers meticulous design, quintessential performance & profound musicality -- elements that shape the spirit of the whole Essence Hi-Fi series. ** Legendary audio quality that just got better: Industry-leading 124d B SNR** Essence STX II delivers industry-leading 124d B SNR audio clarity, a much-envied quality inherited from the revolutionary & widely-acclaimed Essence STX sound card -- & up to 64 times (64X) better than typical onboard audio hardware. Headphone output reaches a fantastic 120d B SNR. ** Ultra-low jitter** A high-precision clock is crucial to audiophiles. Integrated circuits are susceptible to heat & temperature changes, which is why Essence STX II
Includes:: a premium temperature-compensated crystal