Where the **** did they say LINEAR excursion ??? 4" p-p out of either version of the W7 is not linear ...
They really dont have any info on the sub. Myabe when its released( i dont think its out yet) theylle have the full specs on it.Question is...Why dont they just list it as 4"p2p ?
Let's go over the entire conversation, shall we ?
1) This thread is named "Linear Excursion" ... Your first post implied linear excursion considering that's the name of the thread ... Thus the reason why I stated that it wasn't linear ...
2) After I stated that it wasn't linear, you defended it claiming it was, in fact, linear excursion. Now you've retracted that statement and, instead of admitting you're wrong, you said it's a minor technicality ...
3) You provide the video as proof, yet all it did was prove that they never actually said linear excursion
4) I never said that the excursion had to be linear in order to gain output. However, that gain in output from exceeding linear excursion also comes with a significant gain in distortion, too ...
5) Using "the ****" is giving attitude ?
They really dont have any info on the sub. Myabe when its released( i dont think its out yet) theylle have the full specs on it.
the are you constantly calling thr w7 dub7? IMO your giving it a bad Audiobahn esque feature.
And i am 100% behind Jmac. I am not *******, it's because in the past he is literally never ever wrong.
The gotham/fathom(i think too) can be set specifically for your room. So in a very small room it might not have to use all that 4" to get the bass needed. But when set in a big room and it needs that xtra output for a loud explosion, i guess its starts pumping out 3600rms to get that excursion.What does the guy mean........ it has 2 inch peak to peak then it can "shift gears" and go to 4 inch p2p........ wtfs that supposed to mean. W7 has a sub tranny for bigger rooms.
What does the guy mean........ it has 2 inch peak to peak then it can "shift gears" and go to 4 inch p2p........ wtfs that supposed to mean. W7 has a sub tranny for bigger rooms.
There is an old thread on what kind of electrical system you would need in your house to run this thing.I would assume that a true 3.8kW home audio amplifier will be 220V, as the current draw on a 120V single-phase circuit would be way, way too much. Even at 80% efficiency, that's still over 50 amps of current draw. Most residential 120V circuits max out at 25A...
*Sigh*The excursion specs the JL guys talked about in that video were always referred to as "peak to peak". This is NOT linear, this is physically how far a subwoofer is capable of moving. Are the great guys at JL lying? No. But they are not speaking about linear excursion either. Which is rather confusing/deceiving. Sorry nametaken, but you've utterly 100% wrong from the get-go. And furthermore, if JL is so proud of their sub, why do they refer only to P2P specifications? Its a BS advertising video for people who know nothing about subwoofers. That is the LAST place you should be drawing your 'facts' from. lol
Ahh. So a sub isnt seing much current, just the amp?You're right that the voltage will, most likely, be higher than a typical outlet (Most likely 220 volt as Jack said) because most houses wouldn't be able to supply the current without serious upgrades to their electrical systems.
Efficiency = Power Out/Power In
Current = Power/Voltage
At 60% efficiency (approximate efficiency of the 1000/1), you'd be looking at:
0.6 = 3800/Power In
Power In = 3800/0.6
Power In = 6333.333 watts
With a 110 volt outlet, this translates to 6333.333/110 = 57.576 amperes ...
With a 220 volt outlet, this translates to 6333.333/220 = 28.788 amperes ...
The voice coil's resistance, however, will only affect the voltage on the amplifier outputs, though //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
I dont know what the sigh was for, you seem to be acknowledging that everything I said was true.*Sigh*
Just to show the mass people how much the thing can move(and i acknowledge its marketing, never said it wasnt), them saying its moves 40mm one way would kinda be //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif for regular folks(again, its marketing i know). And i never said it was a fact, please show me where i said it. I even stated it was hear say(no specs about the sub), but i doubt theyde lie so thats why i gave them the benefit of the doubt. And like i said before, it probably doesnt move 50mm but maybe higher 40's, which is still an assload.
I sighed because i have to explain something that i really dont have to, if you really took the time to read what i wrote i wouldnt have to break it down. And i didnt acknowledgs everything, just clearing up for you what i really did say/imply.I dont know what the sigh was for, you seem to be acknowledging that everything I said was true.
Ohm's Lawower = Voltage*Current
Power = Voltage*Voltage/Resistance
Power = Current*Current*Resistance
3800 watts into a 3 ohm load would be: 3800 = I^2*3, I = Sqrt(3800/3), I = 35.590 amperes. V = 106.771 volts
So the amp would pull 28.788 amperes of current from the outlet at 220 volts to output 35.59 amperes of current at 106.771 volts to the subwoofer ...
Of course, this won't be completely correct as the driver doesn't have a static resistance. Instead, it has impedance which fluctuates with frequency.