Here's your Goldwood at xmax with 55 watts. Terrible. Inaudible at 20 hz and it will sound like absolute garbage unless you eq it somewhat flat. Best case scenario you can add 6 - 9 db for 4x units, as you can't fully power 4 units to xmax.
It certainly will sound "fast" and "tight" though, as that's what happens when there's no bass at all. There's a bit of midbass but no real bass at all.
An externally hosted image should be here but it was not working when we last tested it.
LOL, bottom octave compromise? This latest driver does nothing much below 100 hz in your tiny sealed box.
Yes, 20 hz does matter but if it's 20 db down from the midbass and it's less than 100 db it might as well not even try to play 20 hz. You would be better off to high pass it and not even try.
And finally, if everything you say is wrong it will be corrected. Deal with it. And have fun with the ladies that are impressed with your bicycle.
96.5dB @ 20Hz is not "nothing"!
i was just going to add the parting note that i attended a gym party in high school powered by a 100w home receiver driving a pair of realistic 3 ways and a similar frat party where the speakers were a couple pairs of 2 way BOOKSHELFs (treating the word bookshelf as a proper name which WOULDN'T translate to bookshelves in the plural form) and you know what, everybody danced and had fun and no one got their slide rules out.
once i get everything up and running, i'll make sure to make at least one HQ video showing people having fun so all the haters can lose their minds. maybe i'll even go with the 300w amp instead. i'll have to ask parts express what 3x 12v7a can handle as i know i won't get any help here, just more criticism for daring to do my own thing and not follow hideous SQ loving sheep.
all ya gotta do is play the kind of funky UPBEAT tunes all the suckers won't.
i was just going to add the parting note that i attended a gym party in high school powered by a 100w home receiver driving a pair of realistic 3 ways and a similar frat party where the speakers were a couple pairs of 2 way BOOKSHELFs (treating the word bookshelf as a proper name which WOULDN'T translate to bookshelves in the plural form) and you know what, everybody danced and had fun and no one got their slide rules out.
once i get everything up and running, i'll make sure to make at least one HQ video showing people having fun so all the haters can lose their minds. maybe i'll even go with the 300w amp instead. i'll have to ask parts express what 3x 12v7a can handle as i know i won't get any help here, just more criticism for daring to do my own thing and not follow hideous SQ loving sheep.
oh, i WILL. if THIS measly system can get sunbathers up and dancing from 100 feet, 38DD milfs freakin' on my leg so hard it's a struggle to keep the bike from tipping over and gorgeous 20 something hippy chicks dancing to disco mesmerized, then yeah, i wonder just how much MORE play i'll get with the thumpinator, a cleaner no wires showing thumb controlled install and a light show. i've already seen locals losing their minds here to a mediocre 2 x 12 system i still say has phase cancellations and running into the street to dance or popping out of car windows as we cyclists do our thing.
all ya gotta do is play the kind of funky UPBEAT tunes all the suckers won't.
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So to recap (and let me know if I get any of this wrong), you like to hang out at high school dances and frat parties. You once wanted to stab your entire class with a pencil. Your motivation for this project is attention from middle age women on the street. You want to build a sealed subwoofer system that plays a strong 20 hz for your disco music and "bass cooker" tracks. You believe you are more advanced in audio science than the members of one of the more advanced forums despite not knowing the effects of qtc or ever having simulated anything, and clearly not having a strong knowledge bass in this area. Is that pretty much right?
No, you could probably hear them distorting.
A 12" driver run free-air needs 37mm of one-way travel (that's 3" peak-to-peak) to produce 25dB of output at 15Hz, stood 1m away. Not a typo. The threshold of audibility for the average person (I accept that you might not be average) at 15Hz is around 80dB, extrapolating from the equal loudness contours.
There's a 55dB(!) gap there, which is a big gap to jump from you hearing the 12" driver flapping around, and then everyone else hearing it.
That assumes, of course, that your drivers are capable of 3" peak-to-peak travel with zero distortion.
Can you understand, then, why we might be a little sceptical of your claims?
Chris
PS - I did a bit more simulation, just for the funsies. Fane 500w 12" driver, around 95dB@1w. It'll do 80dB at 15Hz in free air, but you have to dump 28000V (rms) into it, which works out to around 56 mega-watts. The cone displacement at that power input would be an awe-inspiring 18.5 metres (nearly 60') one-way. Suffice to say, the driver will only stand that sort of abuse for a very short time, and probably only once. Has anyone connected a speaker directly to the terminals of a large power plant?
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Hi,
Neither statement remotely rings true.
Whatever, twisting your limited understanding of audio systems
to be the truth about all and everything seems to be your forte.
(Reality check : no-one cares about your twisted reality.)
You don't know much, that is obvious. You think you do,
that is obvious as well. There is no point posting any
technical advice, because you don't process it, you
find some excuse to ignore it rather than learn.
Arguing with people who know their stuff, and
are trying to help, is pretty close to trolling.
rgds, sreten.
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