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SPECIFICATIONS
The VAC Phi 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 of the Phi 300 when operated at 120 VAC, 60 Hz.
Power Output:
Frequency Response: down 0.5 dB at 7 Hz and 30 kHz, ref 0 dB = 1 watt @ 1 kHz.
Absolute Polarity:
135 watts/channel continuous average power at 1 kHz with less than 3%
THD into 4 ohms connected to the 8 ohm tap in the stereo mode.
300 watts in mono operation.
down 3.0 dB at 3.5 Hz and 115 kHz, ref 0 dB = 1 watt @ 1 kHz.
Does not invert absolute phase.
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