VAC Model 22.1 User Manual
Page 2
6.
Continuous operation of the DAC is recommended for best sound and longest tube life.
7.
The tube inside is type 12AX7/12AX7A/ECC83/E83CC. A low noise tube is not required.
8.
Please call us with any questions you may have. It is better to ask than to guess.
Model 22.1 nominal specifications
Conventions Supported:
SP-DIF
AES-EBU professional
Sampling Rates:
32 kHz
44.1 kHz
48 kHz
...and all rates in between
Inputs:
2 coaxial, 1 optionally AES-EBU XLR jack
1 optical, AT&T type, optional (see special instructions)
Outputs:
1 set coaxial audio (unbalanced)
Output Voltage:
1.9 volts at full output
Distortion:
.02% at full output, 1 kHz
.02% at 9 below full output, 1 kHz
Tube Compliment:
1
E83CC/ECC83/12AX7A (Golden Dragon preferred)
The VAC was voiced specifically with the Golden Dragon range of premium tubes. It is
recommended that this range be used when replacing tubes. Other brands will function but
likely will not sound as good.
AC Power Requirements:
120 VAC nominal, 50/60 Hz, 300 mA slow blow fuse. May be set for 240 VAC operation by means
of the voltage configuration card under the fuse holder, with 150 mA slow blow fuse.
Options:
BNC coaxial input connectors
XLR balanced input connector (AES-EBU)
AT&T optical input