Dick Rees wrote on Tue, 15 June 2010 12:31 |
Here's a link to a search of the PSW for QSC Ksub: http://www.google.com/#hl=en&source=hp&q=QSC+Ksub+%2 B+site%3Asrforums.prosoundweb.com&aq=f&aqi=&aql= &oq=&gs_rfai=&fp=2f8bff4900875437 I have only heard these on the showfloor of my local pro sound shop. They were running with the K10's or K12's. Being engineered as a set, I suspect this is using them to their best advantage. What they would sound like in an open sanctuary is only a guess for me. They did seem nice and "tight", but I've heard comments along the lines of "one note wonder" and "kick drum box" as opposed to a genuine sub. I must say that I do not favor using subs in open sanctuaries. I think they bring more problems than benefits. But that's just my opinion. DR |
Justin Bartlett wrote on Thu, 17 June 2010 23:21 | ||
I'm curious what you mean by "open sanctuaries." |
Russ Buck wrote on Tue, 15 June 2010 10:09 |
Still trying to figure out speakers for my church. My latest idea is to find some decent mains to fly and then a powered sub. Was wondering if anyone has anything to say about these powered subs? |
Jim Ogann wrote on Tue, 22 June 2010 20:45 |
Powered Subs are good. They usually have the crossover installed as well. Parts Express sells a lot of them. We use an EV S-18 and a 500watt amp (half of a stereo amp) and crossover and rattle the walls in a 600 seat room. Two keys we have learned. 1. Get a crossover with a high pass filter and turn it on. 2. Fly the sub as well. When we flew our sub it made it 100 times better. You could get a JBL JRX118SP Powered 18" from Parts Express for $750 (Sku 245-818) and be done. It has the amp, crossover etc. Just plug and play - - but fly it up there with your mains and you will really love it. |
Jim Ogann wrote on Tue, 22 June 2010 22:45 |
Powered Subs are good. They usually have the crossover installed as well. Parts Express sells a lot of them. We use an EV S-18 and a 500watt amp (half of a stereo amp) and crossover and rattle the walls in a 600 seat room. Two keys we have learned. 1. Get a crossover with a high pass filter and turn it on. 2. Fly the sub as well. When we flew our sub it made it 100 times better. You could get a JBL JRX118SP Powered 18" from Parts Express for $750 (Sku 245-818) and be done. It has the amp, crossover etc. Just plug and play - - but fly it up there with your mains and you will really love it. |
George S Dougherty wrote on Thu, 24 June 2010 13:38 |
Unless you can put it somewhere where you trade boundary loading with the floor for boundary loading with a solid (not drop) ceiling, I'd recommend against flying a sub since you put it into free space and lose output capability. |
Brad Weber wrote on Sat, 26 June 2010 00:59 |
I generally agree with your other comments but have to disagree on this one. Experts such as Dave Gunness and Pat Brown have addressed this topic quite well an d found that the 'boundary loading' traditionally attributed to ground stacked subs is a fallacy. One of the issues is that the floor boundary is somewhat shared by the receiver (the listeners) and thus the related gain for that boundary is present regardless of the speaker locations. Instead, the perceived increase in loudness attributed to ground stacked subs is greatly due to in increase in the indirect sound. The level of the sub direct to the listeners does not increase that much since they share the floor boundary, however the sound from the subs hitting the walls and ceiling and then reflected to the listeners does increase. |
Tim Padrick wrote on Sun, 27 June 2010 20:01 |
I disagree. Case in point: In one club at which we play regularly, our stacks (including subs) have to set about 4 1/2' from the side walls (owing to the DJ system). Usually I cut a bit of 60Hz from the subs, but here, owing to boundary cancellation, not only do I not need the cut, EQ at 60Hz makes very little discernable difference. http://www.padrick.net/LiveSound/CancellationMode.htm |
Russ Buck wrote on Tue, 15 June 2010 12:09 |
Still trying to figure out speakers for my church. My latest idea is to find some decent mains to fly and then a powered sub. Was wondering if anyone has anything to say about these powered subs? |
Jim Ogann wrote on Tue, 22 June 2010 22:45 |
Powered Subs are good. They usually have the crossover installed as well. Parts Express sells a lot of them. We use an EV S-18 and a 500watt amp (half of a stereo amp) and crossover and rattle the walls in a 600 seat room. Two keys we have learned. 1. Get a crossover with a high pass filter and turn it on. 2. Fly the sub as well. When we flew our sub it made it 100 times better. You could get a JBL JRX118SP Powered 18" from Parts Express for $750 (Sku 245-818) and be done. It has the amp, crossover etc. Just plug and play - - but fly it up there with your mains and you will really love it. |