'410s not all the same
2001-08-21 by Paul Schreiber
What Ken says is true. The Vactrols in the '410s are VERY loose spec. Probably +-20% to +-30%. Also, the Q of each bandpass is proportional to the ratio of 2 capacitors, that are also 10% each. Such is the glory of true analog :) But there is a HUGE difference in the butter-creamy sound of a '410 versus OTA-based versions. That's *why* we used them. Paul S. waiting for Ken's full-blown Fresh Aire II demo