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Old 30th January 2011, 08:40 PM   #1
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Default awesome modified PA system :)

to begin, i don't need help, i'm just sharing an awesome project
so, i've had the behrninger k450fx for a very long time and it is excellent and i would recommend it to anyone looking for a PA/keyboard speaker, as it does indeed perform considerably for both, and has fantastic sound quality though the stock bugera speaker is lacking a little on the low end. anyways, i've decided to go mad scientist on that little thing. basically the idea is, instead of simply replacing the stock speaker, i'm going to fit 11 speakers into the stock enclosure, all hooked up to the stock amp. yes, correct impedence, i love wiring basically, i've got a 12" 200w eminence bass woofer, 2 10" 300w pyle subwoofers, a pair of 6.5" 175w boss audio component speakers, and four 3.5" 80w clarion coaxial speakers. yummy! from the 45w amp all these speakers get a decent amount of power (it's all in the wiring! serial= power is passed on as though it's one speaker, parallel= power is split, from cascading parallel and serial wiring, you get more total system power (amount of power going to each speaker added up)) the system total power is 185 watts, which is amazing the frequency response is fantastic, from the 12" bass woofer, the 2 10" subs and the 6.5" woofers the bass is wonderful, and the power of 6 tweeters makes for very clear highs as far as power distribution, each speaker gets 23 watts except for the component speakers, which get 12, and are going to be placed on the back of the unit for sound distribution. the 12" woofer will go into the main speaker hole in the front which will be enlarged, the tweeters from the component speakers will go in the top corners, two of the 3.5" clarions will go into the bottom corners, the two subs will go into the sides (i'm probably going to modify it with buckets and brace those to increase enclosure size, or they're gonna go in backwards, that might look cool, though i'm not sure how it would effect cabinet pressure and sound quality) and the last two clarions are gonna go above the subs on the sides. i may also just put two clarions above the subs to make the front look cleaner, though i'm not sure yet. if you see any faults in my designs let me know, and any feedback is appreciated Click the image to open in full size. Click the image to open in full size.
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Old 30th January 2011, 09:05 PM   #2
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it's all in the wiring! serial= power is passed on as though it's one speaker, parallel= power is split
]
so youve managed to rewrite Mr ohms laws then? only i thought in a series circuit the current was the same through them all,and the voltage shared,so the overal power was the same wether you have 1 8 ohm driver or 96 0.83 ohm drivers in series
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Old 1st February 2011, 11:10 PM   #3
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Originally Posted by themadhippy View Post
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so youve managed to rewrite Mr ohms laws then? only i thought in a series circuit the current was the same through them all,and the voltage shared,so the overal power was the same wether you have 1 8 ohm driver or 96 0.83 ohm drivers in series
XD that's what i mean, i was talking in terms of impedence. if you have two four ohm speakers wired in serial, they count as one 8 ohm speaker, and the current etc. is passed the same through all of them, as though they are one speaker. sorry for the inclarity!
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Old 1st February 2011, 11:13 PM   #4
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Also! i have decided to move the 10" subs down to 8" lanzar max8's, simply because the 10's wouldn't fit without almost completely rebuilding the cabinet! and that completely defeats the purpose! XD i want to have a supremely modified k450fx, not a k450fx amp in a new box!
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Old 2nd February 2011, 01:19 AM   #5
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me and my silly mistakes. two 4ohm speakers in serial would end with 2ohm. damn, i have to stop that.
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Old 2nd February 2011, 12:24 PM   #6
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They'd end up (in series) at 8ohm. In parallel, they'd be 2ohm.
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Old 3rd February 2011, 04:17 AM   #7
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Default you may wanna check...

are you sure? i thought in series the impedence of the speakers was multiplied by the number of speakers in the series (i always use speakers of the same impedence) and in parallel if the impedence of the two speakers is the same, you divide the impedence of one of them by 2 to get the final impedence. i also never use more than two speakers in a parallel config. it just makes things easier.
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Old 3rd February 2011, 04:19 AM   #8
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Originally Posted by MossBassist View Post
are you sure? i thought in series the impedence of the speakers was multiplied by the number of speakers in the series (i always use speakers of the same impedence) and in parallel if the impedence of the two speakers is the same, you divide the impedence of one of them by 2 to get the final impedence. i also never use more than two speakers in a parallel config. it just makes things easier.
holy cow i'm stupid. XD sorry, i'm bad at remembering which is which. sorry!!
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