We have put a ton of work into making sure our Q47-D capsules meet our stringent requirements and that our capsule pairs are computer-matched with incredible accuracy. Here’s a sneak peek at EquiLog, the software we developed which is the heart of these processes.
Oct 10th, 2011 @ 3:40 am:ricardo
Very nice. I’ve worked on manufacturing techniques & similar software to get what you’ve done and can appreciate the achievement.
May I ask what is the measuring distance in your anechoic? I take it the capsule is straight cardioid.
Oct 18th, 2011 @ 10:29 pm:skylar
Thanks, Ricardo. You worked for CAD, correct?
We measure both sides in cardioid, then compare the responses of the front and rear membranes. If they’re not matched within 0.2dB, then we reject the capsule, tear off the membranes, and rebuild. But most capsules’ front and rear responses are a much closer match. In fact, it’s pretty common to see front & rear membranes measuring at 0.00dB difference, which is, for all intents and purposes, identical. So the responses you see in this video are composites of the front/rear membrane in cardioid, measured at a calibrated 500mm (~19.69″).