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MOON SERIES
300D Digital-to-Analog Converter 		Updated: August 29, 2011    

 
 

 
 
The MOON 300D Digital-to-Analog Converter features an exceptionally versatile external interface that allows for use with a computer, via its USB-B input, as well as other digital audio source components such as a music server, digital transport, etc. though either S/PDIF or optical TosLink connectors. Intended to fulfill the demands of the discerning music aficionado, the 300D will bring new life to all of your digital audio files, regardless of their storage format.
 
 
Versatile ...     Astonishing ...     Musical ...

 
With internal upsampling using 24-bit/352.8kHz processing, the MOON 300D will reproduce your digital music in a genuine life-like fashion. This DAC will accept an input signal ranging from 44.1 to 192kHz, with a bit-depth range from 16 to 24-bits. Jitter is a virtual non-issue thanks to our highly regarded proprietary digital clocking system. The back panel features a total of 4 digital inputs (USB, SPDIF x 2, and TosLink) and both balanced (XLR) and single-ended (RCA) analog outputs. The balanced outputs provide a significant improvement in noise floor, dynamics and midrange transparency.
 
Sonically, it portrays all of the Simaudio hallmarks: clean, powerful, fast and extended bass combined with an open midrange and airy extended high frequencies. Like other MOON series components, the 300D includes an IR input, an over-built power supply and is housed in a extremely rigid custom-made chassis with a 3/8” brushed and anodized front panel.
 
 

 
 
  Significant Design Features:
 
· Over-sized power supply with 8 stages of voltage regulation
· Internal upsampling which uses 24-bit/352.8kHz processing
· BurrBrown PCM1793 high-resolution 24-bit/192-kHz D/A and 8X oversampling digital filter
· IR input for external control
· Accurate digital clocking system for exceptionally low intrinsic jitter levels
· Single-ended RCA and Balanced XLR analog outputs
· Advanced analog signal path using a DC servo circuit and proprietary analog filter
· Pure copper circuit board tracings with extremely low impedance characteristics
· Extremely rigid chassis construction to minimize the effects of external vibrations
· Accurate matching of the very finest high quality electronic components in a symmetrical
  circuit design
· Designed to be powered up at all times for optimal performance.

 
 

 
  
   
To view a larger image of the 300D DAC's internal circuitry, simply point-and-click your mouse over the image located to the left.
 

 
 
 
 
To view a larger image of the 300D DAC's rear panel, simply point-and-click your mouse over the image located to the right.
   
 

 

An important note about the USB input
 
The USB input on the MOON 300D accepts a digital audio signal of up to 16-bits/48kHz. This is the native specification of the USB input. However, if you require a higher sampling rate, there are ways to achieve this with the 300D.
 
Rather than including a USB input for sampling rates exceeeding 48kHz, we opted to provide the best possible power supply, D/A converter and analog stage in the MOON 300D at this price level. Also, keep in mind that USB wasn’t originally intended for use with hi-resolution audio; there are latency issues which compromise sound quality (i.e. jitter and phase errors, etc.). These could be minimized through dedicated costly circuitry, but this would significantly drive up the cost of the 300D without improving the sonic performance on any of the other inputs.
 
If you intend to use the MOON 300D’s USB input, it’s very likely that your computer is a data source for music. Today most computers with a built-in sound card will have either an S/PDIF (RCA connector) or Toslink (optical connector) digital audio output, thus eliminating the need for a USB input on the 300D. Furthermore, if you’re committed to getting the most out of the music stored on your computer, then in all likelihood you have installed an after-market soundcard in your computer. Virtually all of these soundcards have at least one S/PDIF, Optical or AES/EBU (XLR connector) digital output. At this point, USB connectivity becomes irrelevant. The USB input is there for convenience as opposed to performance.
 
In the event that you wish to use your computer’s USB connection with files greater than 48kHz, there are several relatively inexpensive after-market products; compact one-box USB-to-S/PDIF interfaces that will work with USB datastreams up to 24-bit, all the way up to 192kHz.