A delay stack is used in a PA system for a larger event in a very long room. In a long room the quality of the sound deteriates as you further down the room as sound is absorbed by people, carpet and furniture. Of course you can add speaker halfway down the room, however sound travels at approx 340 m/s or approx and the sound will be out of time. The sound from your front speakers will have an echo compared to your mid speakers and your event will sound like its a train station!
The solution is to add a small delay to the mid speakers to bring them back in time. I also find it useful sometimes to put a short delay on the main PA if I have a deep stage withe a drummer at the back. Pecussive instruments like snare drum really accentuate timeline errors and a short delay, say 10m/s on the FOH can really tighten up the sound. I tried delaying just the snare channel bbut this affacts the f/back adversely. It is an inexact science as delays change depending whether you are left or right of t...
Generally these bands will be offered to you with a very small PA supplied by the lead singer. If you want the best sound for your audience of 200 + PX be sure to ask for a Glenn Smith Sound system to suit your event!
This is probably the biggest Pro Audio Question ever! Great gear and/or a great sound guy? This is what I think. It is great to have incredible gear but if the sound guy is crap its game over! No doubt, there is a minimum standard a good guy needs to get a good sound for you act. And the gear needs to be appropriate for your act/venue. At Glenn Smith Event Production Hire we strive to find a balance between great gear and price but the sound guy will always get you there! I have seen Nexo gear sound crap and Behringer gear sound amazing and otherwise! It is great sound guys that make it happen. Gear that is really maintained will go a long way to make your event amazing!
My view on this is that if you can hand craft products there are some great advantages. I have 15 x Behringer 18 in sub woofer speakers and my main complaint is that while the speaker drivers are great the boxes are are not as well made as they could be. I have built some heavy duty boxes (but light wieght due to advanced desigh) based on thier design and the results have really been really pleasing. These boxes use loads of 45mm screws, proper slotted joints, 3mm aluminium silent grill and highest qualtiy glue and produce outstanding sound and endurance. No crappy staples used here!