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Two amps louder than one ? Advice please!!
Hi everyone, I'm going to play my acoustic-electric at an outdoor wedding, and I have a small 3 watt amp that sounds good. For more range and volume, would it help if I got another one of these amps (Vox Mini) and played both amps using a stereo chorus pedal ? In other words, are two amps at the same volume louder than one amp at that volume ?
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Neil M, Ottawa, Ontario, Canada |
#2
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#3
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You'd need like 10 to 20 of those to handle an outdoor gig with a couple of dozen people. Sound disappates really quickly when you're outside competing with wind, trees and no walls to reflect/contain the sound. I'd be looking at renting or buying a single 10" or 12" PA speaker or equivalent acoustic guitar amp.
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#4
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Doubling the sound power (two identical sources) increases 3 dB. You're going to need a minimum of 60 watts. Try the Bulgera AC 60 for $250 or less.
Sent from my iPhone using Tapatalk Pro
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"Lift your head and smile at trouble. You'll find happiness someday." |
#5
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Good job, Dave. I was wondering if a responder was going to know this.
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#6
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And using 20 will be 13dB louder. Which is 60 Watts assuming the original amps are 3W.
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#7
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You guys are smart. :-). Sent from my iPhone using Tapatalk Pro
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"Lift your head and smile at trouble. You'll find happiness someday." |
#8
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Broadly speaking for people to hear an increase in volume it has to increase 3db. To increase 3db one needs to move from say a 10 watt amp to a 20 watt amp. For another 3db one must move from a 20 watt amp to a 40 watt amp. And then from a 40 watt to an 80 watt.
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Waterloo WL-S, K & K mini Waterloo WL-S Deluxe, K & K mini Iris OG, 12 fret, slot head, K & K mini Follow The Yellow Brick Road |
#9
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Years ago I played electric blues and wanted the old school sound of a turned up amp. A 40 watt amp tuned up was to loud for most situations so I got me two 20 watt amps. I turned one amp all the way up to get that sound. I had the second amp in case I needed more volume. I never did use it.
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Waterloo WL-S, K & K mini Waterloo WL-S Deluxe, K & K mini Iris OG, 12 fret, slot head, K & K mini Follow The Yellow Brick Road |
#10
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As others have said, one or two of those is not going to cut it outside. For a perceived doubling of loudness from that one amp, you need ten of them. And even that would seem little for an outside gig. It would of course depend on the location, distance, and if you're just supposed to be slightly audible background...but for an outdoor acoustic guitar I would have gone for a little powered PA speaker myself.
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#11
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Speaker efficiency is often more important than wattage when it comes to volume. Hence 4X12 cabinets, etc., paired with a 40 or 60 watt amp. The math given is correct, but you rarely go from a 3W amp to a 30 or 60W amp with the same speaker Given your situation I would rent or borrow a small PA. They are designed for sound reinforcement, which is what you need here, after all. Mic the amp or go straight to the PA.
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Brian Evans Around 15 archtops, electrics, resonators, a lap steel, a uke, a mandolin, some I made, some I bought, some kinda showed up and wouldn't leave. Tatamagouche Nova Scotia. |
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Harmony Sovereign H-1203 "You're making the wrong mistakes." ...T. Monk Theory is the post mortem of Music. |
#13
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True dat! Though, your typical guitar speaker rarely vary more than 3-4 dB.
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#14
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You get a +6db bump when you add the additional same amp. +3db for the watt doublage, and another +3db for the doubled cone area. So you'd be kinda-sorta at 12 watts worth, whatever that means (too many variables to know).
As to how many watts you need, it all depends upon the venues, the music style, the efficiency of the hardware, the placement of the hardware, etc etc etc - I have been asked to turn down using 2.5 watts, but that may have been a critique of my playing . . . . . .
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-donh- *everything* is a tone control |
#15
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no......all other things being equal, only a 3dB increase in Sound Pressure Level (SPL) is realized when doubling the sound-generating appliance number, whatever that sound-making *thing* happens to be.
Two of the same amp will be 3dB louder than a single amp. |