01-22-2013, 07:33 PM
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#1 |
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Registered Rocker
Join Date: Mar 2008
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Multiple Speaker Cabs?
So on a lot of big stages you see piles of amp stacks all over the place, and I am aware that a lot of the time they're fake/hollow/unused and simply for show. For curiosity's sake, can you hook up (for example) 4 speaker cabs to an amp head with only 2 speaker outputs? If you can do it with some sort of splitter (excuse the lack of possible technical terminology) would it not just blow the amp?
For example's sake, let's assume I want to hook up 4 Marshall 1960A 4x12 cabs to my 100watt JCM900 head. Any way to do it?
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ESP LTD H-250 Yamaha Super-Flighter SF500 x2 - Sunburst & White Yamaha Super-Flighter SF1000 - Oil-Stain Marshall JCM900 Dual Reverb Lots of pedals including: Marshall Jackhammer - MXR Analog Chorus - EHX Holy Grail (classic) |
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01-22-2013, 07:43 PM
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#2 |
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Registered User
Join Date: Feb 2011
Location: NSB, FL
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2 16 ohm cabs =8 Ohms so with 4 16 ohm cabs you would draw 4 ohms total (in parallel)
So really in the best conditions you can run 4 16ohm 4x12 cabs safely with an ampm that can run a 4 ohm load
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2002 PRS CE22 197? Sanox Sound Creator LP clone (GFS Fat Pat) 2009 Epiphone G-400 (SH-4) Marshall JCM2000 DSL100 Krank 1980 Jr 20watt Krank Rev 4x12 (eminence V12) GFS Greenie/Digitech Bad Monkey Morley Bad Horsie 2 MXR Smart Gate |
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01-22-2013, 07:52 PM
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#3 |
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Registered Rocker
Join Date: Mar 2008
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I'm not really that great with the whole ohms idea other than knowing I have to make sure the numbers add up
 but I think I get that  CheersAlong similar lines, what is the purpose of adding extra cabs? At the moment I only use one 4x12 cab and have my amp as a "half-stack". My understanding is that the amp head will only produce 100watts of volume, so adding more speakers will just dissipate that volume through more speakers but won't actually make it any louder. Am I right, or horribly deluded?
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ESP LTD H-250 Yamaha Super-Flighter SF500 x2 - Sunburst & White Yamaha Super-Flighter SF1000 - Oil-Stain Marshall JCM900 Dual Reverb Lots of pedals including: Marshall Jackhammer - MXR Analog Chorus - EHX Holy Grail (classic) Last edited by makutoid : 01-22-2013 at 07:55 PM. |
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01-22-2013, 08:06 PM
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#4 |
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Registered User
Join Date: Feb 2011
Location: NSB, FL
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It will be a little louder as you increase surface area you will increase DB leveles, but not by signifigant levels.
The answer to your more cab question .....most bands you see are only using a few of the 50 4x12 cabs to play through the rest are just for show
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2002 PRS CE22 197? Sanox Sound Creator LP clone (GFS Fat Pat) 2009 Epiphone G-400 (SH-4) Marshall JCM2000 DSL100 Krank 1980 Jr 20watt Krank Rev 4x12 (eminence V12) GFS Greenie/Digitech Bad Monkey Morley Bad Horsie 2 MXR Smart Gate |
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01-22-2013, 10:12 PM
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#5 |
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Grumpy Old Tech
Join Date: Oct 2009
Location: Australia
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Gilchrist custom guitar Yamaha SBG500 Telecaster Ibanez Iceman Roland GP-8 Quadraverb Abbey Harmonic II Marshall JTM45 clone Marshall JCM900 4102 (modded) Marshall 18W clone Fender 5F1 Champ clone Marshall 1960A Cathbard Amplification Last edited by Cathbard : 01-22-2013 at 10:15 PM. |
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01-22-2013, 10:19 PM
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UG's resident bum
Join Date: Nov 2011
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Quote:
Actually, if wired in series-parallel, then 4 16 ohm cabs would be running at 16 ohms.
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01-23-2013, 12:40 AM
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or simply Nick
Join Date: Mar 2009
Location: Plano, TX
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Quote:
I love how this picture always resurfaces when threads like this come up. But yeah, it doesn't really make sense to use more than a full stack on stage anymore. Hell, most 4x12s can be ran and mic'd in stereo now thanks to the PA. It also keeps the front rows of the audience from going deaf. |
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01-23-2013, 12:59 AM
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Don't even like pedals.
Join Date: Aug 2008
Location: Sydney
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4x4x12.
 Are you nuts dude?
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01-23-2013, 01:56 AM
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Grumpy Old Tech
Join Date: Oct 2009
Location: Australia
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Quote:
Running more than one cab can have another use - the feedback angle. Either kicking in a whole extra amp as well to push it over the edge or dissimilar cabs that you can point the guitar at. I used a 2x12 on top of a 4x12. Once getting the string feeding if I leaned back to aim at the top box the higher harmonics would ring out better. I could make the feedback change as I desired. More than two cabs would be redundant really though methinks. Beyond that you're simply into the realm of the stage prop - and there's nothing wrong with a bit of theatre in your show.
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Gilchrist custom guitar Yamaha SBG500 Telecaster Ibanez Iceman Roland GP-8 Quadraverb Abbey Harmonic II Marshall JTM45 clone Marshall JCM900 4102 (modded) Marshall 18W clone Fender 5F1 Champ clone Marshall 1960A Cathbard Amplification |
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01-23-2013, 06:05 PM
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UG's resident bum
Join Date: Nov 2011
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It shall handle, ALL of the power. Quote:
Unless you've just got THAT much power to handle
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Last edited by Viban : 01-23-2013 at 06:07 PM. |
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