Macau COD Tuning: Day 7 (Underwater SIM) – Updated with screen dumps

Today was scattered around different tasks. We tested the repositioned Sound Beams, further refined the Constellation settings, picked off stragglers in need of verification – or RE-verification, and finally SIM’d the underwater speakers. Soundbeams repositioned First order of business was to find out what we had gained from moving the SB-2’s up 2 meters. The […]

Phase alignment of spectral crossovers

This is a continuation of the impulse response subwoofer thread. Here are some screens from Sounds Systems: Optimaztion and Design that deal with phase alignment of crossovers. The figure above shows the phase responses brought together between sub and main.  The crossover is not steep and therefore the phase response overlap over a wide range. […]

Latest news………

Feb 12:  Added War story #2 Feb 11:  added Part IV to the impulse response saga. That’s all I have to say on that for the moment, pending any comments or questions School news:  We just added a SIM school on to my schedule: New York City,  May 17-20 6o6

Phase Alignment of Subs – Why I don’t use the impulse response

OK. The saga continues down below………………………. What is the best way to phase align our subwoofers to the mains? There is a hint in the way the question was phrased. I didn’t say time align (and it is not because I am afraid of copyright police). I say phase align because that is precisely what […]

Some updates and future topics

I added some graphics to the discussion on Cardioid subwoofers, and ABC of line array tuning. I should have some graphics up for the coherence discussion later this week. I am also in the middle of an old war story.  I was thinking about a few future topics to meander on about: 1) Why I […]

Cardioid Subwoofers

A hot topic of discussion is cardioid subwoofers, so this will be the place to get that topic going. At the moment I will use this as a test to see if I can upload a few graphics from the book here.  The first will be some pics that describe the behaviour of end-fire arrays. […]