The CEN.GRAND 9I-90SA PRO is a versatile device since it fulfills the functions of DAC, headphone amplifier and preamplifier. It has good performance and integrates an ESS ES9038Po DAC chip working in parallel connection on two channels. Four types of outputs are available for headphone listening to match the impedance level required on different headphones. The headphone amplifier function is also its strong point where the audio performance is very qualitative.

Key points :

• A second generation XMOS XU208 USB interface and an FPGAt that supports PCM up to 32bit 384Khz and DSD up to DSD512. 
• An ESS ES9038Pro DAC chip as well as a CT5302 chip operating in dual channels supporting PCM up to 24bit 192KHz and DoP (DSD64) for SPDIF signals in coaxial, optical and AES/EBU input.
• The headphone amplifier function has a single-ended Jack 6.35mm output and two balanced outputs; XLR 4 pins and Jack 4.4mm. It also has 4 output modes: Normal, BTL, Active Ground and Parallel.
• On the preamp side, the circuits are composed of discrete components working with RCA and XLR inputs and can work with infrared remote control. 
• Power supply system with I/V converter.

9I-90SA PRO structure

XMOS XU208 USB Interface

With isolation technology, the interface is completely protected from the noise generated by the device connected via USB, whether it is a computer or a smartphone for example. This greatly improves the purity of the sound.