VAC Statement 450 Monoblock User Manual
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Tips: Impedance Matching
We strongly suggest that you experiment with the available impedance connections for the best
sonic match with your system. Since no loudspeaker represents an unchanging impedance at all
frequencies, it is impossible to assert with certainty which output tap is appropriate to use. In many
systems an amazing difference in sound will exist between the various impedance taps.
Since the impedance of most loudspeakers vary over a wide range experimentation is essential.
Most speakers have a rated impedance of 4 or 8 ohms. We recommend starting with the 8 ohm
connection; after you know the sound if that connection, try the 4 ohm connection. Choose the
connection that sounds best to your ears.
If you bi-wire your system (run separate speaker leads from the amplifier to the high and low
frequency transducers) you may discover that two different impedance taps work best.
Contrary to popular misconception, no power is lost due to unused output taps.
For more information consult VAC Technical Monograph 90-9, which may be viewed on our wesite
(http://www.vac-amps.com).