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SPECIFICATIONS
The VAC Master 300 has been developed with the critical ear as the major arbiter of quality, with both
conventional and unique measurements providing insight and guidance as necessary. The lack of emphasis
on measurements is due to the fact that engineering's arsenal of equipment and techniques do not operate
on the pattern recognition principals that control human perception of sound.
In the immortal words of Daniel von Recklinghausen, if it measures good and sounds bad, it is bad. If it
measures bad and sounds good, you've measured the wrong things.
For those concerned with test bench performance, the following describes typical measured performance
when operated at 120 VAC, 60 Hz.
•
160 watt/channel dual mono into 4 ohms*; 320 watt mono into 4 ohms*
•
Frequency response 4 Hz to 75 kHz
•
Power bandwidth 20 Hz to 70 kHz
•
Single-ended input via RCA jack, non-inverting
•
Balanced input via XLR jack, non-inverting relative to pin 2 ("pin 2 hot", traditional EIA/RCA
broadcast/recording standard); amp is fully balanced in this mode
•
12 volt trigger
•
Illuminated logo; may be switched off
•
8 x KT88, 4 x 6SN7GTB
•
Detachable power cord, standard 15A IEC power receptacle
•
May be factory configured for operation at 100, 120, 220, or 230/240 volt operation
* An extremely stiff power line is required to achieve these output powers. Exact output power will depend
upon the characteristics of the individual tubes fitted and their condition**. A variation of 1 dB in maximum
output power may occur under normal circumstances with fresh tubes.
** Traditionally, tubes are considered to be at end of useful life when power capability is reduced by 3
dBW, but this may not necessarily correlate with subjective sound quality. The green iQ status LEDs will alert
you prior to this point.
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