Wicks
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Posts posted by Wicks
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Guys,
I veering off topic a bit here, but this might add some perspective.
I was going to wait for Tony D's education video to come up about impedance, but it might help to throw this out there for consideration.
There's soo much more to amplifier output then just what you're nominally wired at.
Here's an impedance sweep from a Hertz ES200 8" sub that I have:
Notice the raw driver has an impedance peak of about 30 ohms at ~31Hz.
In a ported box, notice there are two peaks of ~20 ohms at 22Hz and 53Hz.
So your resulting impedance really depends on the frequency of material you're playing.
Burping at one of those peaks would obviously cause no issues to the amp whatsoever.
Notice that the lowest impedance that the driver gets to is approximately its nominal impedance (4 ohms) and it only happens in a few frequency bands. "Re" is it's DC resistance (2.9ohms) if anybody is wondering.
So you can see why testing an amplifier at a resistive load (constant 4ohms) would be a MUCH harder test, which is what the AD-1 does.
Hope that helps.
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15.42V on the 0.5ohm test?
On a charger?
16V bank?
Just curious.
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Great video Tony
Love that you went in and explained specifically what RMS is rather then just throwing up a general formula, especially comparing RMS to AVG.
If people are serious about this hobby then they should be interested in learning how it works technically.
The part on the Vrms of the clipped waveform should open some eyes, that's for sure.
I know its important to keep content in its respective section of the forum, but to increase the views and make sure as many people see the videos as possible, it may not be a bad idea to pin them in the Electrical (and maybe Amplifier) sections as well.
When you get to it, the Subwoofer Section could use a pinned video on impedance too.
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As far as homework goes i was gonna try and do it but when i watch the video he explains it in a way I feel i understand it as the video is going but then when the video ends and I have to think by myself i just sit here scratching my head.
Just remember your basic formulas:
Ohms Law: V=IR
Power = VI = I^2R
Those formulas can be rearranged depending on what number you're given and what you need to find.
Plug in the known numbers and solve for the unknown(s).
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If you have subwoofers/speakers with spring terminals:
Install banana plug terminals on the ends of the wires, then insert the banana connector into the speaker terminal rather then trying to twist and jam the wire into the terminals and ending up with messy wire strands sticking out and possibly shorting together.
IMO, Those spring terminals may say 8ga but they sure don't fit 8ga very well. Especially in a tight corner of a subwoofer enclosure where you don't have room to get your hands and twist the wire.
Another tip that could go along with this............buy your speakers with direct-leads!
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Use a small power resistor inline with your power wire to charge up your amplifier's internal capacitors to avoid the dreaded blue arc that scares the crap out of you when you're trying to connect the power wires.
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Nice practical examples!
Since you're covering voltage/current in and out of various sources and loads, it might be handy to very quickly go over Kirchhoff's Voltage and Current laws.
Or something along the lines of the conservation of power rules which you mostly covered by saying that the power out of the source = the power into the load.
I've seen a lot of people on here confused about how power from a source gets distributed to more then one load.
Never hurts to quote some laws (like Ohms Law already mentioned) since there are some people occasionally who think they can invent their own laws from time to time.
While you're still on DC circuits, any plans on doing a practical example using an alternator, battery and an amplifier and explain how they interact?
This especially ties into the conservation of power since there are a lot of inexperienced people running HUGE amps from a stock electrical system who are blaming the equipment because its blowing up. Just because you have a 10kW amp, doesn't mean that it magically produces that 10kW...
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Soooooooo not that I want to get in the middle of another pissing match, but when talking about wire there is another thing to think about besides just OFC or CCA......your end terminations.
There's so much more to it then just copper or aluminum.
Soldered terminals, crimped, fuses, how many fuses, quality of solder, amount of solder, type of crimp...........
When you combine different metals there is also a voltage drop incorporated with that as well.
Copper terminals, aluminum terminals, plated terminals, surface area of contact....
Take that into account when you're discussing your real-world results as well.
There are literally thousands of combinations of equipment (besides the HU, amps and speakers) that make up your system and every little bit is going to affect it.
All those small voltage drops probably add up and account for more voltage drop then a huge span of OFC or CCA.
The way I look at it is this: Look at your system parameters and calculate the appropriate gear for the requirements. A great rule of thumb is 2x what you need for reliability.
Then if you're happy with your voltage drop and all, then great, you're DONE!
As was said above 99% of us aren't hard core competitors so gaining that 0.2V or 0.5dB isn't going to amount to squat on the Ear-O-Meter so just have fun with your system.
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Some of you guys here are ridiculous...!
I won't name names but damn.....
Tony isn't inventing shit for a profit, he's creating tools that are affordable to most and elevating the common intellect.
He's simply stating theory, yet you guys think its voodoo.
Testing methods have been WRONG for years, he's trying like hell to get people in the right direction yet you think he's fooling you....
Would you rather be in the dark and be happy in your world of misconceptions or realize there were mistakes and use the correct methods?
I hate to break it to you, but testing AC electronics correctly can be expensive..... GET OVER IT!
Most electronics manufacturers spend THOUSANDS actually tens if not hundreds of thousands of dollars to accurately test their equipment.
Tony has customized some of that equipment into pieces that most everyday people can afford which is damn impressive.
I have a professional LCR meter at work that cost $12k!
Tony's IMSG does a very similar function for $300...Bargain.
AC signals involve frequency which means there are varying impedances and phase changes.
Testing those signals requires a little knowledge and the right equipment which is not generally possible with generic multimeters.
Sorry to break it to you, but sometime change hurts...otherwise society keeps making the same mistakes.
Whew..ok I'm done.
Booooooo....Aye....Jamie....Get off the stage....no one cares....back to the discussion....
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Some of you guys here are ridiculous...!
I won't name names but damn.....
Tony isn't inventing shit for a profit, he's creating tools that are affordable to most and elevating the common intellect.
He's simply stating theory, yet you guys think its voodoo.
Testing methods have been WRONG for years, he's trying like hell to get people in the right direction yet you think he's fooling you....
Would you rather be in the dark and be happy in your world of misconceptions or realize there were mistakes and use the correct methods?
I hate to break it to you, but testing AC electronics correctly can be expensive..... GET OVER IT!
Most electronics manufacturers spend THOUSANDS actually tens if not hundreds of thousands of dollars to accurately test their equipment.
Tony has customized some of that equipment into pieces that most everyday people can afford which is damn impressive.
I have a professional LCR meter at work that cost $12k!
Tony's IMSG does a very similar function for $300...Bargain.
AC signals involve frequency which means there are varying impedances and phase changes.
Testing those signals requires a little knowledge and the right equipment which is not generally possible with generic multimeters.
Sorry to break it to you, but sometime change hurts...otherwise society keeps making the same mistakes.
Whew..ok I'm done.
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Good start on the basics
Couldn't wait to jump into the OFC/CCA debate I see.
Unless I missed it, how often with the vids come out?
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Wow, if there is this much arguing over a chunk of wire I can only imagine where this is going to go when Tony gets to the real topics like subs, amps, impedance, "box rise", class D.
This is going to be a wild ride.......
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so basically.... a 5k at .5 is a 10k lol
That is the sign of a well built amplifier with lots of current capacity, if it can continue to double its power when you halve the impedance.
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Stumbled on this myself a while back and have it in my Watch List just for kicks.....
http://www.ebay.com/itm/181146586099?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
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Unless you're in an ultra quiet home listening room with very high end equipment......
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^^^
Been lookin at the face book pics all morning.
13k, on one dead bat. Fuck my face.
??? Details?
On Tony's personal FB?, I don't see anything on D'Amore...
From the looks of it, that T15k proto isn't connected with much wire and I don't see much for battery power.
That would be a true testament to how effective its internal cap-bank is:
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Am I doing something wrong?
One TrunkPack:
"Your order does not meet the minimum total for this coupon code to be applied. Please spend another $37.87 first."
Two TrunkPacks:
"The coupon code you entered couldn't be applied to any items in your order."
The website is showing the regular price of the trunk pack much cheaper then it was before when I bought on in August from the other sale...?
it only gives you the discount on the Damplifier Pro™ 20 sq. feet - Trunk Pack
Yep, there it is.....
I just saw "TrunkPack" and jumped on the first one without realizing there are two TrunkPacks.
Thanks guys
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Am I doing something wrong?
One TrunkPack:
"Your order does not meet the minimum total for this coupon code to be applied. Please spend another $37.87 first."
Two TrunkPacks:
"The coupon code you entered couldn't be applied to any items in your order."
The website is showing the regular price of the trunk pack much cheaper then it was before when I bought on in August from the other sale...?
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Nice custom stealth install.
Very clean!
X15 loudness question
in Sundown Audio - GREAT Amps/Subs! GREAT Customer Service!
Posted
An amplifier doesn't create power, it converts it.
If you give it a limited electrical supply, then your output will also be limited.
Proper alternator, battery(s) and wiring should always be your first step.