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Things You Don't See Anymore Part 3

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Our band (1972-76) had a Pa-900 with a pair of CSP 15/12/horn stacks. Good memories. The high and low notch filters made setup much easier in odd venues. Just set the channels, then start turning up the master volume until the first feedback node, notch it out, continue to the 2nd node, notch it out, then back the master to a usable level, and there was no ringing. Such an improvement over trying to eliminate feedback by adjusting tone controls.
Marcus