m902 - Reference Headphone Amplifier / DAC / Monitor Controller


 

Where Hi-Fi meets Hi-End. Simply plug in your favorite headphones, cue up your best reference tracks and get ready to hear, literally, what you¡¯ve been missing - courtesy of the m902 reference headphone amplifier.

At the core of the m902 is our audiophile, high-current transimpedance amplifier circuitry, which effortlessly drives even the lowest impedance headphones and provides the high-resolution and low-level ambient detail for which all our products are famous. This circuitry makes familiar recorded material become at once transparent and alive, while critical details in editing and mastering become obvious and easy to manipulate.

Professionals and audiophiles alike are continually floored by the m902¡¯s high performance 24bit/192kHz DAC, which includes our unique s-Lock¢â dual stage PLL (Phase Lock Loop) for extremely low intrinsic jitter and rock solid digital performance.

A full complement of analog and digital inputs are provided (AES3, S/PDIF, TOSLINK and USB), which are selectable via a front panel rotary switch. And we offer an optional infrared remote control, which provides the essential controls for anyone working out of reach of their m902.

The m902 cleverly adds stereo unbalanced or optional balanced (m902b) analog line outputs for connection to powered studio monitors or amplifiers. This allows it to double as an elegantly simple high fidelity monitor controller or even a purist audiophile preamplifier / DAC. And, similar to our larger studio monitor controllers (m906, m904), the m902 provides some essential user calibration settings which help it to integrate into any playback environment.

The m902 includes a crossfeed circuit, or XFeed, which simulates the natural acoustics of a loudspeaker listening environment and HRTF (Head Related Transfer Functions). This circuitry, designed by Dr. Jan Meier, can significantly improve imaging, while reducing listening fatigue when using headphones.

Celebrated by audiophiles and audio engineers alike, the m902 is a crossover smash hit and a must have for anyone searching to discover new depths in music and sound.

  • balanced and unbalanced analog inputs
  • 24bit/192kHz digital stereo inputs- AES3, S/PDIF, TOSLINK and USB (USB input supports 16 bit/44.1 and 48k only)
  • s-LockTM phase lock loop sample clock regeneration for ultra-low jitter and rock solid digital stability
  • high-current transimpedance headphone amplifier circuitry built to effortlessly drive low impedance headphones
  • variable level balanced or unbalanced analog outputs for studio monitors
  • all electrical and mechanical design elements maximized for absolute purist, audiophile performance
  • precision level control with a 95dB range in .5 dB steps
  • channel level matching accuracy of 0.05dB
  • crossfeed circuitry (XFeed) for improved headphone imaging
  • optional infrared remote control available
  • internal linear power supply with custom wound toroidal transformer
  • no electrolytic capacitors in the signal path
  • highest quality metal film resistors used throughout
  • sealed gold contact relays used for all signal switching
  • five year warranty on parts and labor

SPECIFICATIONS ANALOG IN
Gain
Normal Mode
+0dB
Boost Mode
+10dB
Frequency Response
@ 0dBu out +/- .25dB
22Hz - 120kHz
@ 0dBu out +/- .5dB
12Hz - 260kHz
@ 0dBu out +/-3dB
4Hz - 600kHz
Maximum Output Level
@1kHz, 50 Ohm load
+21.4dBu (9.11Vrms)
Impedance
INPUT
106K Ohms balanced
INPUT
53K Ohms unbalanced
OUTPUT
1 Ohm
Dynamic Range
@ 0dB gain
116dB
@ -10dB gain
119dB
THD+N
+10dBu out, 50 Ohm load, SMPTE 4:1
<0.01%
Headphone +10dBu out, 50 Ohm load
<0.008%
Line Out +10dBu out
<0.002%
Attenuator Channel Matching
24 position switch <0.05dB
Attenuator Range 99.5dB
?
SPECIFICATIONS D/A CONVERTER
Input Sample Rate 32, 44.1, 48, 88.2, 96, 176.4, 192kHz
THD+N
44.1kHz, 24bit, 1kHz, +20dBu out
<0.002%
Noise Floor
0dB gain, 22-22kHz
-94dBu
0dB gain, A-weighted
-97dBu
Power Requirements
120VAC
.16A
230VAC
.08A
Dimensions and Weight
?
Dimensions
H1.7 x W8.5 x D8.25
Weight
5 lbs (2.2kg)

 

DOWNLOAD
* User Manual (PDF)