TonyD'Amore
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Posts posted by TonyD'Amore
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Dual voice coil subwoofer with one of the coils wired backwards?
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Make sure you have "Sound Check" in iTunes turned off or it will change the level of the tracks!!
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Wouldnt it change with more excursion tho? Since im assuming the imsg-1 only puts out a very small wattage
It can shift slightly at high power due to the enclosure walls flexing, the vent being restrictive if not large enough, ect. These issues aren't good ones to have in the first place though lol
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When playing a hz thru the imsg-1 and is that calculating
Box rise?
Sure is
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Note on reading patents on the USPTO site. You must use IE as your browser (I hate it too), and you must have a .tiff viewer installed to see the images and drawings. I use this one http://www.alternatiff.com/
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Limit is 10krms per channel.
Or you can run it in mono for 20kW RMS
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steve, will the dyno read higher voltage from cars doin 16v+? im real intrested in one also. i have a few big amp u can test if your up for it.
16V + all day
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Dang those are some big..... thingers!
Idk what they are. Huge resistors I assume?
Those are the loads for the amp dyno. They are basically brakes from a bullet train, or electric rail.
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Ok, I am a little confused by this. Are we only looking at the input side? If the input side on any given unit is Differential, do we want Twisted Pair regardless of what the output of the component feeding the input?
Here is my flow chart....
Headunit Balanced Output (speaker level twised pair wire) -> Processor 1 Differential Balanced Input = Processor Unbalanced outputs ->RCA CABLE-> Processor 2 w/ selectable Differential Balanced or unbalanced inputs = unbalanced outputs ->RCA CABLE-> Amplifier Differential Inputs
That being said, I *think* That I want to use RCA's as follows?
Processor 1 -> Twisted Pair RCA -> Processor 2 with Jumper set to differential balanced input->Twisted Pair RCA -> Amplifier Differential Inputs.
Is this right? or do I want
P1 -> Coax RCA -> P2 set to unbalanced input -> Coax RCA -> Amplifier Differential Input
I may be over thinking this. I just don't get the balanced/unbalanced output part of the equation.
Please help! lol
>Ok, I am a little confused by this. Are we only looking at the input side? If the input side on any given unit is Differential, do we want Twisted Pair regardless of what the output of the component feeding the input?
Here is my flow chart....
Headunit Balanced Output (speaker level twised pair wire) -> Processor 1 Differential Balanced Input = Processor Unbalanced outputs ->RCA CABLE-> Processor 2 w/ selectable Differential Balanced or unbalanced inputs = unbalanced outputs ->RCA CABLE-> Amplifier Differential Inputs
That being said, I *think* That I want to use RCA's as follows?
Processor 1 -> Twisted Pair RCA -> Processor 2 with Jumper set to differential balanced input->Twisted Pair RCA -> Amplifier Differential Inputs.
Is this right? or do I want
P1 -> Coax RCA -> P2 set to unbalanced input -> Coax RCA -> Amplifier Differential Input
I may be over thinking this. I just don't get the balanced/unbalanced output part of the equation.
Please hel
p! lolIf all your processors and amplifier have balanced inputs then use twisted pair everywhere.
Cool thanks.. So the inputs are what matters, and not the ouputs. Also, your RCA's look awesome, had a couple questions though. The RCA ends look pretty long in the picture which can making installation more difficult sometimes. How long do these measure? Also, what gauge wire is being used? A lot of the mass produced RCA cables use a pretty small guage wire in their twisted pair cables, which I am not sure how important the wire gauge is in a 2-12v signal?
18 AWG each wire in the twisted pair. The coax is 2 x 22AWG center conductors, per channel. RCA shell is 1.1 inches, plus a rubber boot on the end is 0.5 inches. It can be removed if needed, it is only cosmetic.
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Ok, I am a little confused by this. Are we only looking at the input side? If the input side on any given unit is Differential, do we want Twisted Pair regardless of what the output of the component feeding the input?
Here is my flow chart....
Headunit Balanced Output (speaker level twised pair wire) -> Processor 1 Differential Balanced Input = Processor Unbalanced outputs ->RCA CABLE-> Processor 2 w/ selectable Differential Balanced or unbalanced inputs = unbalanced outputs ->RCA CABLE-> Amplifier Differential Inputs
That being said, I *think* That I want to use RCA's as follows?
Processor 1 -> Twisted Pair RCA -> Processor 2 with Jumper set to differential balanced input->Twisted Pair RCA -> Amplifier Differential Inputs.
Is this right? or do I want
P1 -> Coax RCA -> P2 set to unbalanced input -> Coax RCA -> Amplifier Differential Input
I may be over thinking this. I just don't get the balanced/unbalanced output part of the equation.
Please help! lol
Ok, I am a little confused by this. Are we only looking at the input side? If the input side on any given unit is Differential, do we want Twisted Pair regardless of what the output of the component feeding the input?
Here is my flow chart....
Headunit Balanced Output (speaker level twised pair wire) -> Processor 1 Differential Balanced Input = Processor Unbalanced outputs ->RCA CABLE-> Processor 2 w/ selectable Differential Balanced or unbalanced inputs = unbalanced outputs ->RCA CABLE-> Amplifier Differential Inputs
That being said, I *think* That I want to use RCA's as follows?
Processor 1 -> Twisted Pair RCA -> Processor 2 with Jumper set to differential balanced input->Twisted Pair RCA -> Amplifier Differential Inputs.
Is this right? or do I want
P1 -> Coax RCA -> P2 set to unbalanced input -> Coax RCA -> Amplifier Differential Input
I may be over thinking this. I just don't get the balanced/unbalanced output part of the equation.
Please help! lol
If all your processors and amplifier have balanced inputs then use twisted pair everywhere.
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The DD-1's input impedance is between 100k Ohms and 50k Ohms depending on which "gear" the autoranger circuit is in. If an amplifier can't handle a 50k Ohm load, it's not an amplifier.
Tony Maybe you should call him up and record the conversation. I'd love to hear the geek speak he's capable of in a debate with you over the functionality of amplifiers and equipment. Please?
lol
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The DD-1's input impedance is between 100k Ohms and 50k Ohms depending on which "gear" the autoranger circuit is in. If an amplifier can't handle a 50k Ohm load, it's not an amplifier.
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Many class D amplifiers make some buzzing type noise when the output signal is clipping, or close to clipping. I believe it is mostly the giant output inductors they all have.
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I should also add -- In that example both amplifers were gain matched @ 60Hz! So that is actually a best case senario.
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I agree with Steve, if you have more than one amplifier in your system the CC-1 is a must. On the surface it seems like if your crossovers weren't adjusted properly it wouldn't make that much of a difference in output, only in sound quality. FALSE.
Example: A DVC or 2 subwoofers on two amplifiers. Amplifiers are legit 3000 Watts per channel. Crossovers on these amps were set "by eyeball" Amplifiers have 24dB/Oct crossovers, actual crossover point set at 65Hz the other at 95Hz. (very easy to do if you are aiming for 80Hz and your knob has 30Hz at one end and 300Hz at the other) Let us also say for this example that we are trying to play a 60Hz signal to our subwoofer(s).
Amplifier A - 3000 Watts, crossover set at 65Hz. When playing 60Hz the output signal is going to be 164.3 degress out of phase with the input signal
Amplifier B - 3000 Watts, crossover set at 95Hz. When playing 60Hz the output signal is going to be 101.7 degrees out of phase with the input signal
So the two amplifiers are 62.6 degrees out of phase with each other at 60Hz! Okay, so what does this mean? This means that your TWO 3000 Watt amplifiers ARE NOT putting out 6000 Watts TOGETHER. They are only putting out (6000 W * SIN(62.6deg)) = 5341 Watts.
Want 659 Watts FOR FREE? Get a CC-1 and set your crossovers properly
- Tony D
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I know this probably belongs in the wiring forum, but I want to get Tony's opinion on this.
I recently purchased an amplifier with a balanced input port. Obviously in any quality build, the goal is to get the cleanest input signal to the amplifier. The problem is, my head unit does not have a balanced output, only unbalanced RCA's. Would it be worth it to get some RCA to XLR adapters and plug them in directly behind the RCA port. I've seen people do something similar with line drivers, but is there any real benefit in converting a 2 conductor signal up to a 3 conductor signal?
Here is my rationale and background:
I work in the underwater, offshore electronics industry so I have a pretty good idea about cables and connections. A lot of our customers want cables with twisted shielded pairs to eliminate electronic noise. I have even had customers request that we install a diode in between the conductor and the connector. Regardless, I recognize that the benefit of a balanced connection is to reduce electrical noise, but what else can be done here?
In short (too late I know) what can I do to improve this signal, will a line out driver that will convert the rca to balanced even be worth it? Why? or why not?
You would have to convert it to a balanced signal at the source and then transmit it as a balanced signal down a twisted pair cable to your amplifier. This may reject the noise better than transmitting an unbalanced signal down a coax cable. If using a good Coax cable, an unbalanced signal is typically pretty noise free in most installs. The problem is when someone uses "twisted pair" with an unbalanced signal. This doesn't work well. I've actually made a video on the topic, waiting for Steve to post it up.
Tony
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Hunter, the software will not create a graph. It will however let you obtain all of the T/S parameters. We are working getting it done.
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could we get a diagram of how to wire it? or atleast let us know what wires will need to be connected? i just want to make sure i have everything right for when it gets here.
sure.
Positive, Negative, Remote.
Yes
Positive goes to what you want it to read the voltage on? I know that might be a stupid question but its been a long day after getting 4 hours sleep.
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Sorry about the poor video quality, we just obtained a new camera and didn't have it on the correct setting for HD. Enjoy.
We used all car audio components in the making of a Rube-Goldberg machine with an electrical engineering and car audio twist. List of materials used in sequence below with event sequence.
1. Rockford Fosgate 100 Farad capacitor connects to Rockford Fosgate fused distribution block.
2. Electrical current flows through fused distribution block to 1 strand of copper wire wrapped around string hanging from ceiling.
3. Copper wire gets hot, melting hanging string that suspends 1 Farad Rockford Fosgate Capacitor.
4. 1 Farad Capacitor falls onto wood lever, lever hits a curved opened end wrench converting vertical motion into horizontal motion.
5. Horizontal motion of wrench hits D'Amore Engineering CC-1 case, which causes a domino falling effect of 5 SMD / D'Amore Engineering Crossover Calibrators (CC-1), 9 SMD / D'Amore Engineering Distortion Detectors (DD-1), 9 SMD / D'Amore Engineering High Voltage Distortion Detectors (DD-1HV), and 5 SMD / D'Amore Engineering Impedance Meter - Crossover Calibrators (IM-SG).
6. Last DD-1HV hits toggle switch which applies DC current to D'Amore Engineering AF-8 Subwoofer prototype
7. AF-8 subwoofer cone moves outward hitting tube of IM-SG microprocessor ICs
8. Tube of microprocessor ICs hits roll of solder
9. Roll of solder falls onto IM-SG case which presses power switch of power supply underneath it.
10. Power supply turns on specially modified IM-SG with New Years 2013 bomb code
11. IM-SG activates ignition of dual C6-3 rocket engines in an attempt to blast Santa and his bottle of Jim Beam into the block wall on the other side of the shop.
Due to safety concerns we limited the movement of the sleigh with sled chocks and a guide string.
Happy 2013 from your friends at D'Amore Engineering!!!
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Getting close guys, they are in production
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Amps usually are linear throughout the whole frequency range.
The difference in wattage should be nowhere near audible.
So if you set it up at 40hz, it's very unlikely you'll have clipping at 30hz.(maybe 30-20hz is you have some special brazilian amp..But that's the amp that is bad)
If your friend burps, it shouldn't matter that the tone clips a little. Most of the times a little clipping will increase your score because it can put out more wattage.(sometimes even hard clipping gets you higher scores.)
What he said ^^^
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Issues ?
in SMD Distortion Detector (DD-1) Topics
Posted
Also, just use one crossover for your subwoofer. If you are going to use the one in the amp, turn the one in the head unit off or at the highest frequency possible.