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  #1  
Old 05-01-2013, 10:17 AM
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Got this in my DD Audio's May newsletter. Thought some of you guys might find this useful. It's a free App
DD Tool Box App - YouTube
DD Tool Box App - YouTube


DD Toolbox iOS App

The DD Toolbox iOS app is officially available for download via iTunes. Inside the toolbox you'll find several useful tools for setting up and analyzing your DD car audio system. Since installers have a lot going on while setting up a system, we designed the DD Toolbox layout to be installer friendly. We made the tool icons extra large, and you're able to easily swipe between tools. The tools included are a Wattage Calculator, Tone Generator, DD Box calculator, About DD page, and to round it out we included a flashlight. A cool DD Toolbox feature not found on other apps, is the ability to use multiple tools at once. For instance, you can use the Tone Generator while punching numbers into the Wattage Calculator, all the while illuminating your trunk with the flashlight. The DD Toolbox is a free download. Future updates will include a paid version with additional tools and an Android compatible version.


Here's a quick rundown of the included tools:

Wattage Calculator: This tool uses Ohm's law to determine the actual amplifier wattage output and impedance rise of your system. You can use this function to construct a power/impedance cure which will help optimize your system.

Tone Generator: This tool is able to generate any tone for 20Hz-20kHz. You can use the slider or keypad to adjust the frequency. This tool can be used in conjunction with the Wattage Calculator to construct your power/impedance curve.

DD Box Calculator: DD woofers and The DD Box system were developed together to extract the highest efficiency from a given box volume. The DD Box system takes the guesswork out of enclosure design by optimizing the tuning, and making woofer recommendations for your music and enclosure space.

Flashlight: Believe it or not this tool gives you the ability to see in the dark. What's even cooler is you can toggle it on/off from every page of the app.

Last edited by iamsonic; 05-07-2013 at 05:52 PM.
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Old 05-01-2013, 10:41 AM
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F Iphone
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it makes since that if u add an alternator it will add resistants make your MPG go down but i dont see how turning up your volume adds more resistants.
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Perhaps a mod could change it to "Massivespfail"?
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Old 05-01-2013, 10:43 AM
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Quote:
Originally Posted by bigdhenderson View Post
F Iphone
^^ This
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Old 05-01-2013, 10:51 AM
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They will have one for Android too.
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Old 05-01-2013, 02:57 PM
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Quote:
Originally Posted by Eocuph View Post
Wattage Calculator: This tool uses Ohm's law to determine the actual amplifier wattage output and impedance rise of your system. You can use this function to construct a power/impedance cure which will help optimize your system.
Wait, what?

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Old 05-03-2013, 11:29 PM
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I downloaded and tested it out a little bit, its cool for free.
I like the tone generator it is nice and the signal is cleaner then
some of the other free iPhone tone generators but I wish someone would
put a -3,-5,-10,-15 db adjustment for the generator.

However when clamping an amplifier and calculating wattage you have to take into account phase compensation. Would be nice if it had a spot for the percent of phase compensation. They could make it an option so when you enter a number it applies it to the overall equation and when left blank it skips it.
It seems the programing is using the equations:
Volts x Amps = Watts
Volts / Amps = Rise
So rise is fine as long as the person used an Oscope to make sure they were not clipping when taking VAC AAC readings.
But the Watts good be off by a good bit in some cases.
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Old 05-03-2013, 11:34 PM
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Looking forward to the Android version.
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Old 05-07-2013, 05:15 PM
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Even if there is no clipping, voltage and amperage will not be in perfect phase.
You'd need to be able to take a snapshot of both at the same time or know the phase angle difference between them to calculate true wattage, but I digress, you covered the gist of it.

=)




Quote:
Originally Posted by 512Rodeo91 View Post
I downloaded and tested it out a little bit, its cool for free.
I like the tone generator it is nice and the signal is cleaner then
some of the other free iPhone tone generators but I wish someone would
put a -3,-5,-10,-15 db adjustment for the generator.

However when clamping an amplifier and calculating wattage you have to take into account phase compensation. Would be nice if it had a spot for the percent of phase compensation. They could make it an option so when you enter a number it applies it to the overall equation and when left blank it skips it.
It seems the programing is using the equations:
Volts x Amps = Watts
Volts / Amps = Rise
So rise is fine as long as the person used an Oscope to make sure they were not clipping when taking VAC AAC readings.
But the Watts good be off by a good bit in some cases.
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Old 05-07-2013, 05:43 PM
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Yes I have been schooled since that post and the proper term would be:
It needs an option to apply the "power factor" in watts calculator. I would pay $0.99 for the app if it did that and the addition of the above mentioned DB adjustment to the tone generator part.

n8skow can you tell me if you can do it with two separate O-scopes and over lay the charts to get time of separation or do you have to do it on the same O-scope. I have an old fluke 92b and cannot find the clamp accessory for it, so I was gonna buy a O-scope that comes with clamp and lay the graphs over each other basically to find the time difference in phase. will this work if I properly Line the graphs up and they are on the same scale of coarse.
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Old 05-07-2013, 05:51 PM
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Simplest way would be with a dual-trace O-scope (though not the cheapest solution).

I would 'think' there would be some slight accuracy issues using two separate scopes depending on their accuracy/calibration - though that's beyond my range of experience... Perhaps someone else here can chime in?
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