#46
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Kurt, if you're ever in NYC, PHL or the poconos I'll show you what's what with this collection of amps that I have.
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#47
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Nope. Went another way.
hunter |
#48
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But... I will be going up to NY at least a few times a year for work, family & friends. I'd love to see what you have going on with amps. Next time I'm heading up, I'll give you a shout. You mentioned three locations, do you split time between them? |
#49
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Yeah, I do. During the summer I take trips to the beach as well. I typically have two amps with me at a time. If you give me a week's notice, I can bring a larger selection.
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#50
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#51
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Sounds good, I should be heading up for a week in August. I'll give you a shout and if you are around and available we'll get together. What type of music do you mostly play?
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#52
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When I put together my first battery-powered set-up, I had looked at the portable DuraCell units, but frankly, I didn't think one of those tiny batteries would be enough to get me through a gig. I may have been wrong about that,,, but as far as I was concerned, risking the possibility of running out of juice mid-show was simply not an option. Granted, the 115ah battery I bought is bulkier/heavier, but it does the job (and then some),,, plus, it can do many jobs "other than" power music gear.(camping for example, or running power-tools, running electric trolling motors (fishing) etc) Last edited by Bobby1note; 05-27-2016 at 07:59 PM. |
#53
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Has anybody tried running small amps (like practice amps) through one of those "jump-start" battery backs you see in auto parts stores these days? Some even have a 110 v AC outlet so you don't have to use an inverter. Here's an example, although Schumberger and Peak Power have their own models: http://www.sears.com/diehard-platinu...5&blockType=G5 They range from about $60 for a 600 peak amp to about $90 for a 1000 peak amp, plus more if you want an air compressor ... I'm wondering if they'd give about four or five hours with a practice amp, which is all I'd really need. And as Bobby1note mentioned, you can use it for lots of other things, like camping, re-charging electronic doodads ... and starting cars.
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Yamaha FG-411-12 String Oscar Teller 7119 classical (built in 1967) and a bunch of guitars and mandolins I've made ... OM, OO, acoustic bass, cittern, octave mandolin, mandola, etc. ... some of which I've kept. |
#54
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Sizing your Portable Power
The diehard unit referenced cites "1150 peak amps for a jump start and larger capacity charging with 54 hours of 12V DC power." It definitely has an inverter if it has an AC outlet. What you really need to know is the amp-hour rating. How many amp-hours do you need? Check the input rating on your amplifier. It should be printed near the AC power connection. It may be expressed in Watts or VA. For our purposes here they can be treated the same. Lets say your amp is rated at 100 VA input. Most inverters are 90 efficient. So the DC end has to supply 100 ÷ 0.9 = 111 watts. 111 ÷ 12 VDC = 9.26 A coming from your battery. If you want to power your amp for 4 hours thats 9.26A X 4 hours = 37 A-hr. If you want to use a lead-acid deep cycle battery you don't want to run it down less than 50%. Also most inverters have a low battery supply cutoff if you run the charge down below ~11 VDC. So double that to 74 A-hr and you can be confident you'll have enough juice. Sound too big? It probably is.
The better way is to measure the actual current a battery needs to supply your amp thru your inverter. I calculated I needed no more than a 200 W inverter, so I bought it. I hooked up a 12 VDC battery and measured the DC current draw. You can't use an AC clamp-on meter for this! It cannot accurately read DC amps! So I measured ~3 ADC from the battery to power my amplifier through my inverter at normal performance volume. So 3 A X 5 hr = 15 A-hr. Doubling that so I won't run it down less than 50% means I need a 30 A-hr battery for my application. Your mileage will definitely vary, unless you're using the same amp and inverter that I am. |
#55
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Booster-packs use "engine cranking" batteries, which are designed to put out strong bursts, over a short period of time.(30 seconds or so) Best to go with a deep-cycle marine battery, which is specifically designed for this type of application. |
#56
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Anyone tried the Laney Audiohub Freestyle or the Artec PMD3-8?
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#57
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Just throwing in my 2 cents. I do some Mobile DJ work, I have tried several setups, Behringer, Alesis..all battery powered, rechargeable. .they worked but not great. Bought a Roland AC33 used for acoustic jams and such and now it is my go to portable rig. Acoustic stuff, DJ stuff, Beach weddings, public announcement situations. .all in all, I love it. Yes there are better amps out there, but NOT battery operated in my opinion.
Sent from my SAMSUNG-SM-G870A using Tapatalk |
#58
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https://www.youtube.com/watch?v=qIJfVhj-T6g |
#59
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Congrats on the scoop Dog. There's also a 5.25" version of this on the website (but no 8" version yet).
Looks like a loudbox mini with a multi select FX, 48v phantom, notch and a battery. If it really lasts 15 hours, sounds great and weighs 16lbs (and costs $600 or so), it could be the best portable option on the market. Quote:
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#60
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