warwickhunt Posted June 26 Author Share Posted June 26 1 hour ago, Bill Fitzmaurice said: If you don 't high pass the mains you're at least doubling the stress on their amps and drivers; taking the load off them is one of the reasons for using subs. You also open the possibility of low frequencies from the mains cancelling low frequencies from the subs. Defo going to take the HP filter out option from the sub to the mains (so they get nothing below 80/120 depending on setting) but the mains also have a setting for receiving a full range signal from a sub and the mains then apply a filter... why you'd not HP coming from the sub I'm unsure? Quote Link to comment Share on other sites More sharing options...
Jack Posted June 26 Share Posted June 26 Yeah if you're using the filter in the subs then run the tops full range. 1 Quote Link to comment Share on other sites More sharing options...
warwickhunt Posted June 26 Author Share Posted June 26 11 minutes ago, Jack said: Yeah if you're using the filter in the subs then run the tops full range. I'm assuming the QSC 'sub' setting is for use when a sub sends a 'thru' full range signal, which I'll not be doing. Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted June 26 Share Posted June 26 High passing both would be double filtering. But that's not necessarily a bad thing. PA pros with high quality DSP crossovers usually use 48dB/octave slopes for maximum mains protection and minimal pass band overlap. It's unusual for the slopes in powered speakers to be that steep, so your thought of trying it both ways is valid. Quote Link to comment Share on other sites More sharing options...
warwickhunt Posted June 26 Author Share Posted June 26 5 minutes ago, Bill Fitzmaurice said: High passing both would be double filtering. But that's not necessarily a bad thing. PA pros with high quality DSP crossovers usually use 48dB/octave slopes for maximum mains protection and minimal pass band overlap. It's unusual for the slopes in powered speakers to be that steep, so your thought of trying it both ways is valid. As the FBT sub has either an 80 or 120 setting and the QSC mains (I THINK) have a 100 filter (or full range flat), I'll have to experiment as to what sounds best. Worst case scenario, the FBT sub deals with the HPF and I leave the mains/tops as full range and they'll only receive above the sub setting. I'm going to HPF guitars and vocals on the desk, hence the sub will only be handling kick drum and bass guitar (should I decide to put the bass through the PA rather than backline). It'll be trial and error but I have a tech rehearsal booked to run tests before it is used in anger. Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted June 26 Share Posted June 26 Bass, and for that matter any instruments, though the PA isn't about volume so much as it's about dispersion. Dispersion is a midbass and higher frequency concern, so high passing the bass at 60 to 80Hz doesn't interfere with it. 1 Quote Link to comment Share on other sites More sharing options...
okusman Posted August 20 Share Posted August 20 Experience of this sceanario… 4 piece rock band. QSC TouchMix 16 into 1 RCF 702 (x-over built in) into Two QSC K10s (with EXT sub selected) Loud enough for every pub/club we play All band use IEMs Back line for bass and guitar at sensible levels. Priority is clear and ‘pleasant’ vocal able to sit on the band sound. We regularly get told it’s nice and ‘clear’. The sub is probably the weak link, BUT honestly it’s musical and clear rather than gut thumping. If there’s a friendly wall to reinforce it, then great. Not many venues seem keen on huge bass response vibrating the optics. Mark 1 Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted August 20 Share Posted August 20 Gut thumping bass isn't the fault of the gear, it's the fault of the person running it. 😒 Quote Link to comment Share on other sites More sharing options...
okusman Posted August 20 Share Posted August 20 Thanks for your vote of confidence Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted August 20 Share Posted August 20 If you're not getting huge thumping bass that sounds like an approaching Godzilla or some kid in a ricer then you're doing something right. I've worked with plenty of sound men at the top of the food chain who didn't get it right, prime examples of the Peter Principle at work. Quote Link to comment Share on other sites More sharing options...
okusman Posted August 20 Share Posted August 20 Indeed. I knew what you meant. Because you can is often not a decent green light 1 Quote Link to comment Share on other sites More sharing options...
EBS_freak Posted August 21 Share Posted August 21 (edited) Also remember the amount of bass is also dependant upon the genre of music and the preference of those listening to it... It's not as easy as saying lots of bass = bad. Edited August 21 by EBS_freak 2 Quote Link to comment Share on other sites More sharing options...
jezzaboy Posted August 25 Share Posted August 25 On 20/08/2024 at 23:10, Bill Fitzmaurice said: If you're not getting huge thumping bass that sounds like an approaching Godzilla or some kid in a ricer then you're doing something right. I've worked with plenty of sound men at the top of the food chain who didn't get it right, prime examples of the Peter Principle at work. I was watching a band last night in a small pub and this is what was happening. When the bass player used his low B it was a most unpleasant. 1 Quote Link to comment Share on other sites More sharing options...
Jack Posted August 26 Share Posted August 26 (edited) We played a small gig last night that was a farewell to my indie band, wrapping up after 6 years. The venue was maybe 5m by 15m so not a large place. Our pa was our guitarist's pair of RCF 715s. I chose to use my QSC K12.2 behind me as a traditional 'amp' rather than as a wedge, just in case there wasn't enough bass from the pa, but it sounded fine. To be honest I felt the kick drum was a little lacking,but I could probably have fixed that if I really tried. A good no-sub experience all around. https://www.facebook.com/100002035809426/videos/426055013791392/ https://www.facebook.com/100002035809426/videos/1245536366603778/ Edited August 26 by Jack Quote Link to comment Share on other sites More sharing options...
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