VAC PA-90

Vintage Tube Monoblocks Amplifiers. The VAC System 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.

96 watts continuous average power at 1 kHz with less than .35% THD into 8 ohms connected to the 8 ohm tap. 120 watts continuous average power at 1 kHz with less than .45% THD into 5.33 ohms connected to the 8 ohm tap. Triode mode reduces power to 60 watts. Frequency Response: down 0.5 dB at 6 Hz and 90 kHz, ref 0 dB = 1 watt @ 1 kHz. down 3.0 dB at 2 Hz and 103 kHz, ref 0 dB = 1 watt @ 1 kHz. Negative Feedback: Loop feedback is fixed at approximately 8.3 dB regardless of output tap selected. Absolute Polarity: The PA90 does not invert signal polarity. Input Impedance: 100k ohms Sensitivity: .7 volts RMS input produces 90 watts output S/N ratio: > 94 dB