Posted by Wayne Parham [ 67.66.231.148 ] on August 01, 2004 at 16:33:59:
In Reply to: tube friendly speakers posted by jim denton on August 01, 2004 at 12:46:12:
The output impedance of some tube amps is relatively high, so it forms a voltage divider with the load. If the source output impedance is high, the load impedance curve will have an effect on the response curve. So that's why some tube amps work best with speakers having a relatively flat impedance curve.
Other amps are not affected nearly as much, and many modern woofers are designed with an assumption that output impedance is low and that the amplifier can electrically damp the driver.
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