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An audiophile jewel in mint condition, the Colorado company Grace Design's m902 (2010) D/A headphone amplifier includes the following key features:
$950.00
- Stereo analog inputs - balanced (+4dbu) XLR and unbalanced (-10dbv) RCA.
- Ultra low distortion 24-bit /192khz DAC accepts stereo digital input sources in AES3, S/PDIF and TOSLINK (optical) formats with auto sample rate detection and digital de-emphasis filter.
- USB input provides a convenient way for users to enjoy a reference quality monitoring experience when connected to their computer. This interface supports 16-bit audio at 44.1 Or 48kHz sample rates.
- s-locktm dual stage PLL (phase lock loop) circuitry for the ultimate in low jitter digital signal stability and sonic integrity.
- Unbalanced line level outputs (m902) are provided via rca jacks on the rear panel for connection to stereo monitors.
- Balanced line level outputs (m902b) are provided via ¼” tip-ring-sleeve ( TRS) jacks on the rear panel for connection to stereo monitors.
- Front panel rotary encoder provides precision level control of both headphone and line output levels. Level adjustments are made in 0.5db steps within a 95db range.
- 0.05db channel level matching to ensure true stereo balance at any monitoring level.
- A large, blue 7-segment display is used to show headphone and stereo main output levels.
- Calibration mode enables left/right balance adjustment for both headphone and mains outputs. There’s also a display dim mode that turns off all led’s except for the main power switch led.
- X-feed (crossfeed) simulates the acoustics of a loudspeaker listening environment which can significantly improve imaging while reducing listening fatigue when using headphones. This feature employs carefully designed signal cross-feed, filtering and delay circuits to simulate hrtf (head related transfer functions).
- High current transimpedance output amplifier design drives 8 ohm loads. The m902 was specifically designed with low impedance headphones in mind.
- Only the highest quality 0.5% metal film resistors are used throughout and there are no electrolytic capacitors in the signal path. Sealed gold contact relays are used for all signal switching.
- Infrared remote control for level control, left/right balance, mute and more when using the optional remote control unit (not included).