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Here is my point, which I probabl didn't make clear. We may not be able to hear 10hz, but I can produce it in my gear, sent it to my 12" cab, and make the cone pop out of the speaker with enough gain. I'd rather divert that energy to a sub, not my precious 12" powered cabs. Kris > If my understanding and experience are correct, the 10hz signal simply > would > not be reproduced by the 1x12, since the circuitry probably rolls off > considerably below ~70hz I imagine the EV's (great speakers!) may have > clip protection designed in. > > A rule of thumb is to have power amp that is 1.5 -2X the rating of the > speaker you are driving. A speaker/cabinet rated at 150w/channel would > benefit from an amp rated at 200-300w/chnl. This is to ensure plenty of > headroom for the amp so it doesn't clip. > > Another point to keep in mind is that the reproduction of low frequencies > requires a lot more amplifier power. That's why the subs often come with > 400w power amps. > > BagEnd www.bagend.com makes a powered sub with integrated ELF >processing, > capable of reproducing 8hz. Click on Tech Library in the left menu, >then > read about InfraSub if you'd like a better explanation. One of the > advantages of their design is that the cabinets are surprisingly small. > I > have some of their PA speakers, including an ELF sub, and can attest to > the > very high quality audio - both for studio/home theater, and sound > reinforcement (which is the type I have). > -Qua > > > -----Original Message----- > From: Krispen Hartung [mailto:khartung@cableone.net] > Sent: Tuesday, January 01, 2008 3:40 PM > To: Loopers-Delight@loopers-delight.com > Subject: Re: Powered Subs > > True, they won't damage my 1X12 cabs provided I keep the level stable. I > could hook up my laptop to one of my cabs and blast 10hz into it with the > volume on ten, and my laptop level all the way up...it would pop the cone > right out. So, whether they can handle it, depends on what you mean by > "it". > > For what I want to do at an experimental music concent, they won't cut >it. > > Kris > > > ----- Original Message ----- > > >> With Max etc, you can produce sounds below 50hz that some subs can >> reproduce. >> >> But don't fear, I believe the low frequencies won't damage the 12" >mains. >> the mains will reproduce only harmonics of the fundamental low notes, >> rather >> than the fundamentals themselves. That's why you can 'hear' low end >> even >> on a car radio without sub woofers. The harmonics kind of fool your >> brain >> into perceiving the fundamental sound. You just don't get the full >> impact. >> Besides subs, you need room acoustics that will support low frequencies. >> This is where room dimensions , shape, and acoustical treatments can >> really >> make a huge difference. >> >> -Qua >> >> -----Original Message----- >> From: Krispen Hartung [mailto:khartung@cableone.net] >> Sent: Tuesday, January 01, 2008 12:05 PM >> To: Loopers-Delight@loopers-delight.com >> Subject: Re: Powered Subs >> >> ----- Original Message ----- >> From: "Rick Walker" >> [snip] >> >> Rick - let's use BEMF as an example. You remember how huge that sounded >> last >> >> year, right? We could not have produced that with just the 15" mains >that >> were next to the stage. We had subs on each side and they were pumping >> out >> the sounds in a major way. When you have electronic musicians (guys >> using >> max/msp, Reaktor, etc) producing giant, almost movie soundtrack sounds >in >> the 50-100hz range, two powered 12 inch cabs, or even an inexpensive >home >> theater sub isn't going to do the trick in my opinion. What I will >buy, >> I >> will use at BEMF this year. I'll have my two 1X12 powered ElectroVoice >> SxA100s for mids/highs, but I will definitely need some low end. I'm >> afraid >> I would blow those speakers with the low end that I heard at last year's >> festival. So, the single Mackie powered sub I listed seemed like a good >> choice in this case. Sure, I would love to save myself some money and >buy >> two lower end powered subs for $300 each, but then I am already at $600, >> only $250 short of the big daddy Mackie sub which is a nice piece of >gear >> that will deliver low end for years and years. >> >> Kris >> >> >> > >