Rack Digital Alignment Delay ???

[juan doggie]

I've a lot of sunn stuff but I recently picked up a digital alignment delay;
a piece of tape on it warned me that the output is inverted with respect to the input?
Does anybody know what this piece is all about?

[tacklebox455]

its big words for saying it should only be used in a effects loop but you can use it like a stomp box just wont sound as good.

[mckinnon audio]

  Hi there,if it's an alignment delay unit,it's not an echo or reverb type delay.It's used for time offset correction when you're using multiple sound sources,like a concert setting where you have the FOH stacks and delay towers farther out in the crowd,you delay the entire mix going to the towers,to the time it takes the sound from the FOH stacks to reach there,otherwise you get the Haas effect,hearing the same sound from 2 sources,it will end up sounding echoey,or very blurry,for lack of a better description.You probably won't want to use this in your rig,good luck,Mel.

[Rex B]

I was at Sunn when we designed this....Howard Goetz did the design. Mckinnon is right, it's not an effect, it's an alignment delay used to correct time smear caused when rear reinforcement or side reinforcement speakers are used. This product was one of the things that resulted when we started using time delay reflectometry (TDR) in the lab. It is adjustable in miliseconds. The speed of sound is approximately 1140 ft/sec,(std temp/pressure 14.7 psi, 60 degrees F etc) so if the side or rear speakers are 100 ft from the mains at the stage, you set the delay at 11.4 milliseconds. It was brand new, state of the art stuff then, pretty standard now. It was one of the first true A to D / D to A audio products. I don't think we sold very many, it was kind of ahead of its time, and not very well understood.