Re: Powered Subs

["Krispen Hartung" <khartung@cableone.net>]

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
>>
>>
>>
>
>