The Grace Design m903 keeps
everything great about its predecessors, the m901 and m902, adds some
useful new features, and ups the ante with even more breathtaking audio
performance. A new volume control provides higher headroom and lower
distortion and noise. New generation DAC's and ultra-low noise balanced
current to voltage converter yields even more musical performance
compared to the m902. Improved s-lock PLL circuitry delivers even lower
phase noise and jitter. An improved power supply isolates headphone
amplifiers, line amplifiers, DAC's and digital logic, resulting in lower
noise and distortion.
Perhaps the most exciting improvement is the all new high speed USB
interface. This cutting edge technology provides a completely
asynchronous data transfer mode which allows for bit-perfect USB
playback with zero interface induced jitter. This new interface affords
standard driverless USB Class 1 operation on Windows and Mac up to
24bit/96kHz and USB Class 2 audio for 24bit/192kHz operation on Windows
and Mac (drivers needed for 192kHz operation under Windows). This is
computer-based audiophile playback, perfected.
New crossfeed circuitry is even more useful and includes a gentle
compensation to eliminate the perceived loss of low frequency content.
Both balanced and unbalanced line outputs are now standard, with
individual volume controls for each. We have even included a mono mode
for checking a mix for phase issues or simply monitoring in mono. These
improvements cement the m903 as the perfect compact, audiophile grade
monitor controller, even for larger scale production environments with
more than one set on monitors.
A full complement of analog and digital inputs are provided (balanced,
unbalanced, AES3, S/PDIF, TOSLINK and USB), which are selectable via a
precision rotary front panel switch. And we offer an updated optional
infrared remote control, which provides essential control for anyone
working out of reach of their m903.
Advancing the tradition of unmatched audio performance and
functionality, the m903 is now the ultimate solution for high resolution
audio playback. From the very top mastering engineers to the most
discerning audiophiles – it is a must for anyone searching to discover
new depths in music and sound.
Features
Balanced and unbalanced analog inputs
24bit/192kHz digital stereo inputs- AES3, S/PDIF, TOSLINK and USB
High speed USB interface - completely asynchronous transfer mode
allows for bit-perfect playback with zero interface induced jitter
Driverless operation on Windows & Mac up to 96kHz/24bit
Supports USB Class 2 audio specification for 192kHz/24bit
operation on Windows & Mac (drivers needed for 192kHz operation
under Windows)
New generation DAC's and ultra low noise balanced current to
voltage converter yields more musical performance compared to the m902
Mono mode for checking mix phase issues (or listening to Pet Sounds)
s-Lock™ phase lock loop sample clock regeneration for ultra-low jitter and rock solid digital stability
High-current trans-impedance headphone amplifier circuitry built to effortlessly drive low impedance headphones
Balanced and unbalanced variable level analog line outputs
Improved power supply architecture isolates headphone power amplifiers, line amplifiers, DAC's and digital logic
Precision level control with a 99.5dB range in 0.5 dB steps
Channel level matching accuracy of 0.05dB
Improved x-feed circuit eliminates perceived loss of low frequency content
Optional infrared remote control available
Internal linear power supply with custom wound toroidal transformer
Sealed gold contact relays used for all signal switching
Five year transferable warranty on parts and labor
