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#1
06-09-2014, 06:21 PM
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Why don't guitar amps have.....
an electrical out let to power pedals and assorted other widgets? I hope I'm not the first to think of this, but it would seem simpler. I suspect there may be electrical reasons.
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#2
06-09-2014, 06:39 PM
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#3
06-09-2014, 08:14 PM
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Guitar amplifiers "amplify" very weak electrical signals.
Most stomp-box pedal require 9V DC power.......that is not a voltage typically found in guitar amplifiers. In order to create 9V DC from 120V AC, the outlet power is first stepped down (lower voltage) and then rectified (convert AC to DC). While this supplemental electrical function could -- in theory -- be placed inside of the chassis of a guitar amplier, the inclusion of the feature is likely to add additional weight, additional heat, and additional noise. Referring back to the original statement, most amp manufacturers probably do not deem it prudent to add something which is a potential noise source (i.e hum) inside the chassis of an amplifier.
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#5
06-09-2014, 10:39 PM
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Both my 1973 Fender Deluxe Reverb and my 1980 Yamaha GL100-112 have AC outlets on the back panels... comes in quite handy, but ONLY for low volume applications IF you are powering up another amplifier!
As someone replied, the AC supplied from the back of an amp somehow is not as strong and consistent as from a wall outlet... and I don't know why, but I do know that I played a gig once where outlets were at a premium, and so had to plug my amp into the back of the other guitarist's... after a short time, I started experiencing what many would call a "brown out"... my amp still worked and all, but it was very weak and fizzy sounding... Seems to work just fine for the 9v adapter from my pedals though...
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#6
06-09-2014, 10:50 PM
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Quote:
Thanks for any insight.
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Martin BC, Canada
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#7
06-10-2014, 08:27 AM
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Different pedals, different requirements. Some have 9 volt center pin negative, others are center positive. Radials require 15 volts ...
And besides that factor, your amp is at the back of the stage, your pedals are up front where you are. You've already got one (or more) long 1/4" cable running to the amp form your pedals, would you really want a flimsy thin 9 volt cable strung around, too?
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#8
06-10-2014, 12:28 PM
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I carry and ext. cord with a power strip. Most often when I play outdoor events there is one receptacle.
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#9
06-10-2014, 01:05 PM
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Quote:
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#10
06-10-2014, 01:10 PM
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Quote:
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"You don't have to be great to start, but you have to start to be great." -Zig Ziglar Acoustics 2013 Guild F30 Standard 2012 Yamaha LL16 2007 Seagull S12 1991 Yairi DY 50 Electrics Epiphone Les Paul Standard Fender Am. Standard Telecaster Gibson ES-335 Gibson Firebird
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#12
06-10-2014, 01:34 PM
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Quote:
Between the different voltages and plugs, the different distances to pedals, the different numbers of pedals, and the preference of many for batteries over power supplies, there's just no point. I use a one-spot power supply for my pedal board and could not be happier.
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Some might call me a "Webber Guitars enthusiast".
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#13
06-10-2014, 02:18 PM
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My '73 Traynor amp has a grounded three prong supply plug on the back. I've never used it. I run a cord to my pedals.
Bob
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#14
06-11-2014, 06:51 PM
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The VHT Special 12/20 combo and head amps all have a courtesy 9V power output on the top, upper right hand corner of the amp as your looking at it from the front. I have a 1X12 Special 12/20 non-reverb/trem combo and use that 9v power output to run an old Line6 Verbzilla pedal for it - its the last thing that the pedal board is plugged into, then from the pedal right into the amp input. It is a great idea, and it's handy as hell to have sitting right there. I find it so much easier to be able to adjust the reverb level there on the top of the amp instead of down on the pedalboard.
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