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It all depends on how the manufacturer "calculates" their "watts". Do they use the peak to peak of an AC waveform (the WRONG way) or the RMS (70.7%) of 1/2 of the waveform (the correct way). And that is just figuring from a voltage.

But How well does the amp "produce " that voltage- continiously-or on a short peak.

There are all sorts of ways to stretch specs. If it looks to good to be true. It probably is.

The only specs that might could be believed on that amp put it in the range of 70-110 watts.

MUCH less than the Behringer.

ANd BTW Behringer amps are pretty much the cheapest amps out there. Real amps cost a lot more.
 

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Hey there Ivan...You sure are getting around. :wave:


Long story short. No commercially available, affordable plate amp gives the power output of Behringers EP2500/4000. It's been tested at about 830w per channel at 20hz into a little over 2 ohms. Yes it threw the breaker with 4ohm bridged testing at 20 cycles, but real world use is not sustained 20hz sine waves. If it was, I would not consider the increasingly popular burst type amps at all, as they fall flat on their face with that type of continuous full power testing from what I've seen so far. A # of other amps from other manufacturer's including Face and Dayton died on the same test bench, so it's not like the Behringer was the only one to have issues. Some of the budget Crown's didn't fare any better either and some were much worse even (XTI series). The Behringers are not the best amps in the world. Crown, Crest, QSC and a whole slew of other mfg's make much better ones, but they also cost considerably more. The Behringers offer what a lot of DIYers want which is just cheap bulk power.

If that much power is not needed get the Oaudio by all means. It tested well for a plate amp.

Skip that Pyle. It'll be lucky to do 100w like mentioned.
 

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Discussion Starter #83
Thanks for all the input. All things considered, I have pretty much decided to go for the OAudio 500w. I think it will have plenty enough power for me in my room, and also has the benefit of being able to be integrated easily into the sub design.
 

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Real amps cost a lot more.
Most would consider the Behringer to be low end, but I think by most standards they are a reasonable value. There is no reason to make comments like this that might be considered demeaning to those that use the product, or that might be considered condescending to others.

I think that the take-home point to this thread is that while the Behringer is certainly not a high end product, it is very powerful for the price, and for subs is probably a good choice for many. The reason so many use it is because there is not much of a cheaper alternative for similar power. So to answer the OP question, I don't know of a cheaper alternative with similar or better performance, unless you happen to find a good cheap used amp. The cheaper alternatives will likely have much less power and higher distortion.
 

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Thanks for all the input. All things considered, I have pretty much decided to go for the OAudio 500w. I think it will have plenty enough power for me in my room, and also has the benefit of being able to be integrated easily into the sub design.
Although you'll lose 3db of max spl (and therefore some eq ability to a degree), the flip side of that is your driver will only be using half its rated power handling ability, and in truth its probably capable handling slightly over 1000 watts. The driver will remain so far within xmax it will never ever be an issue, which is a big plus with a DIY sub that has no inbuilt protection circuitry. The voice coil will also enjoy the same headroom, so you know its well covered.
 

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Real amps cost a lot more.
The Behringer amp is a real amp. It's not a fake amp for sure. If I hook it up to my sound system it will provide plenty of power for my needs.

Pro-Audio and Home Audio are entirely different scenarios and for home audio the Behringer does just fine.

FYI a person could build amps for much cheaper than the cost of the Behringer even. :T
 

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The Behringer amp is a real amp. It's not a fake amp for sure. If I hook it up to my sound system it will provide plenty of power for my needs.

Pro-Audio and Home Audio are entirely different scenarios and for home audio the Behringer does just fine.

FYI a person could build amps for much cheaper than the cost of the Behringer even. :T
Ive never even considered that option. Where might I start looking into that?
 

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Ive never even considered that option. Where might I start looking into that?
You will need a basic understanding of electronics, but once you have it national makes chipamps that cost 5 bucks each and have a spec for building an amp. I plan to build 6 of them for my speakers someday.
 

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Its interesting information I'll look into sometime. I would have though a simple mono slave power amp module for a diy sub would be a good place to start?
 

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Timely post for sure as I am allso in the market for an amp for a tuba sub build. One thing that appeals to me about rack mounted amps is that you only have to run speaker wire to the sub which can easily be run under the carpet or along base board. The plate amps however require you to run RCA cable to them and have a place to plug them in.

One question I did have however is that I read a post somewhere that plate amps are more susceptible to humm problems. Is this the case?
 

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Yes hum is an issue, but is is always an issue with plate/ pro/ consumer amps or many other types of equipment for that matter. Don't let that dissuade you.
 

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Timely post for sure as I am allso in the market for an amp for a tuba sub build. One thing that appeals to me about rack mounted amps is that you only have to run speaker wire to the sub which can easily be run under the carpet or along base board. The plate amps however require you to run RCA cable to them and have a place to plug them in.

One question I did have however is that I read a post somewhere that plate amps are more susceptible to humm problems. Is this the case?
Hum has a variety of causes. using a start ground topology and signal attenuators when appropriate should help.
 

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Plate amps, or any amp that's at the sub, tends to require very long interconnects which can pick up hum. Not always the problem of the amp. Running an external amp and then just long speaker cables doesn't present this problem.

Bryan
 

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Yeah Bpape, I think that is perhaps the point that of the thread I read was trying to make. I wanted to use a plate amp for my tuba sub but since I am not sure of the placement..and my walls are all closed up and don't lend themselves to easy cable snaking...I'm going with a variety of speaker cable runs along the baseboard.
 

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What is more you get a rid of the speaker cable but the mains cable comes into play, and that could be a problem when trying experimenting with the positioning.
 

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Very true. It's always a tradeoff. One of these days, someone will come up with wireless power and we'll be all set... :scratch:

Bryan
 

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Very true. It's always a tradeoff. One of these days, someone will come up with wireless power and we'll be all set... :scratch:

Bryan
Hehe:rofl:, well well Bryan thats the trend at least, but how much power could be transmitted wirelessly, maybe a couple tens of milivolts, and milivolts multiplied by miliampers makes microwatts :dontknow::dumbcrazy:

wireless signal is another matter but mains cable is there again
 

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Hehe:rofl:, well well Bryan thats the trend at least, but how much power could be transmitted wirelessly, maybe a couple tens of milivolts, and milivolts multiplied by miliampers makes microwatts :dontknow::dumbcrazy:

wireless signal is another matter but mains cable is there again
No wireless electricity has been around for centuries. They already use it in Iraq. You can get plenty of power that way.

http://www.witricity.com/

Check it out. :bigsmile:
 
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