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The Boulder 2020 DAC receives the
digital signal via one of six inputs. It
is then completely de-jittered through
the use of a phase lock loop circuit,
essentially performing a reclocking of
data.
After processing in the 32 bit DSP,
the 24 bit signal is transferred at data
rates over 700kHz from the main
chassis to the audio boxes. The five Burr
Brown converters (per channel) yield
the purest, quietest signal possible.
From here the Boulder analog
expertise takes over. All gain stages are
the Boulder 993, the first in a special
current to voltage converter circuit. It is deliberately
bandwidth limited as the first step in removing
digital aliases.
Next a triple 993, six pole Bessel filter removes
the remaining artifacts, but leaves the audio band
untouched. A fifth 993 creates the balanced output.
During creation of the Boulder 2020, it was obvious
that there was a lack of attention to the analog in
other designs. By including the required quantity of
993 stages, sonic clarity was taken to a level beyond
any other design.
A special feature is the ability to change the timing
between channels. This time advance feature is
useful in effectively moving the listening position to
one side of the room, thus accommodating a favorite
listening position. A remote control is provided to
allow adjustment of this and other 2020 features.
The three section chassis design (left audio,
right audio, and digital) removes any interference
between the analog and digital sections. An elegant
combination of stainless steel, aluminum and powder
coating complements any decor.
Two digital outputs are provided. One follows
the main source, while the second can be separately
selected for simultaneously feeding a recorder.
A separate 2000 Power Supply features three
individually magnetically shielded toroidal
transformers. Three independent regulated supplies
power each of the audio channels and the DSP/
digital/display circuitry.
The attention to detail in both the digital and
analog sections will bring new life to your entire
music library.
B o u l d e r A m p l i f i e r s , I n c .
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SPECIFICATIONS
DIGITAL INPUTS 4 AES / EBU, Conver ts to SPDIF,
1 Toslink, 1 ST Glass
DIGITAL OUTPUTS 2 AES / EBU, Conver ts to SPDIF
ANALOG OUTPUTS 2 Balanced Main
NOMINAL OUTPUT 4.0 Vrms
ANALOG HE ADROOM 10 dB
SIGNAL TO NOISE 118 dB A weighted, 115 dB f lat
FREQ RESPONSE + 0, - 0.05 dB , 20 Hz to 20 kHz
THD + N, 0dBFS 0.0 02 % , 20 Hz to 20 kHz
CONVERTER 18.0 wide, 6.875 high, 16.25 deep (in.)
POWER SUPPLY 18.0 wide, 4.25 high, 16.25 deep
WEIGHT 90, Shipping : 115 Pounds
POWER 120 VAC , 50 - 60 Hz, 18 0 W
