Musicians inverter

The Wino

The Wino

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My friend's looking at a battery and inverter to power a bass cabinet off grid and I'm wondering whether to power my guitar amp and pa as well total wattage about 200 at full whack although we're more likely to use half that at the most. Any recommendations we want it not too bulky light and cheap (and tonight's lottery numbers if possible!!)
Someones loaned him a 10ah 12v battery I'm wondering if thats enough for say 2 hrs use and if anyone has experience if modified sine wave is ok or not
 
At an average of 100 watts with inverter efficiency it will use about 9ah if its a lead acid battery you don't want to run it down below 50% so you will get just over ½ hour out of a 10ah battery assuming it's in tip top condition.

With electronic equipment always best to use a pure sine wave inverter.
 
You'll be pushing it with that battery, depending upon how much you crank up the amplifiers. Assuming all is perfect, and you could drain every last bit out of the battery, you'd be at 120W for an hour. Take off inverter efficiency and real world battery operation, you'll be lucky to get half that.

Square wave or true sine wave depends a lot on the quality and type of your amplifier power supplies. I'd always go true sine - you'll likely end up with noise from the inverter otherwise. Sorry!
 
Best bet would be one of the Lithium power banks but one with a big enough battery is going to be over £2k.
 
Looks like we might be sticking with acoustic!. I did wonder about getting the back off the amp and seeing if it's a 12 v transformer inside and just going straight from the battery. Might just go for the bass amp its about 30 w on the inverter.

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The Wino said:
I did wonder about getting the back off the amp and seeing if it's a 12 v transformer inside and just going straight from the battery.
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A 100 watt amp will have a power supply of approx +35v & - 35v.
 
A 100 watt amp will probably use 50 watts average, so from a 12V battery that's about 5A. For two hours of use, that's about 2 x 5 = 10 amp-hours. Most lead-acid batteries are best used only down to the 50% level, so you would be better with a 20Ah battery. Or two 10Ah batteries in parallel, if that's what you have already.

A 150W pure sine wave (PSW) inverter is not very expensive, and could be run off an old car battery ( an 80Ah battery that's down to half its capacity for example).
 
Nedge68 said:
Have you thought about a fully portable PA?
there are plenty to choose from, for example…

www.gear4music.com

JBL EON ONE Compact All-In-One Portable PA Speaker at Gear4music

JBL EON ONE Compact All-In-One Portable PA Speaker at Gear4music
www.gear4music.com www.gear4music.com

not cheap, I know but neither is having to replace you PA.
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We've got a bass guitar cabinet and two other guitars and two mics. We could buy a whole lot of portable PA stuff but if it came to it we'll probably just amp the bass and play the rest as loud as we can manage acoustically. The problem we really have is trying to balance with a sax!
 
1652112110415.jpeg

Sax players and drummers not renowned for their grasp of volume control, try putting them in one of these, Just tell them it will keep them warm, and they can walk on water, though they probably already believe that anyway!

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Nedge68 said:
View attachment 616152
Sax players and drummers not renowned for their grasp of volume control, try putting them in one of these, Just tell them it will keep them warm, and they can walk on water, though they probably already believe that anyway!
Click to expand...
I could try that but as it's the wife who is the ( very good) sax player and the rest of us are relative beginners I'm not so sure it's a good idea!. Baker Street isn't quite the same without a sax
 
My accoustic goes with me but in deference to the neighbouring vans the Strat stays home.
 
How about using a 12v amp, based on the TDA3116?
I would take a look inside your speakers, like LennyHB says they might have a split supply, but if they are class ’D’ you might be lucky.
 
Hi Wino came across this when browsing my CPC catalogue, unfortunately they seem to have increased by about 30%.
Rechargeable and will work off an external 12V source


Sorry no idea what they sound like.

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Hi, after looking at all the options we settled for one of these. Perfect small box solution for outdoor gigs, much less problems than a generator.

Run a 1500w pa and a couple of guitar amps for 2-3 hrs with plenty still in the battery.

For perfectly smooth output we’ve added a spike protected 4 way.

ALLPOWERS Portable Generator 288Wh Power Station Emergency Power Supply with DC/AC Inverter, PD Technology, Wireless Output, Charged by Solar Panel/Wall​


Amazon now at £199
 
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