aculous

I read this post probably 5 or 6 times. Debated on responding because I don't really know you like that, but you kinda struck a chord. I can't relate like some of these other guys can, I just read your post and it reminded me of losing certain people in my life. For me it wasn't instant, especially when the circumstances weren't great. For some people in my life it was just good to have some type of closure. Hopefully if nothing else that is what this is for you. Hope you figure this one out and you come out better for it.

Also just wait till I do my doors. You'll feel a lot better.

Yea they kinda glossover the green stage sanding step

He has no need to teach you anything. He doesn't owe you anything. You don't deserve anything from him or anyone else because you have no respect for people and their efforts based upon your comments. If you have a question there are ways to ask it. These people are giving away free advice, at their leisure to people in our hobby. A little respect for their time and everyone elses on this forum would be a good thing for you. This isn't a engineering forum, he is not presenting untested findings to you. In fact I regret ever saying anything about an amplifier because of your comments. Maybe i joined the wrong forum then. A lot of the things I said/asked/stated were just out of interest but get taken way out of context. I'll leave the discussion for now. Thanks again mr d'Amore for developing this product and taking the time to answer my questions. I don't think you joined the wrong forum man, I just think that you went about it the wrong way. Now back to the boombox.

Hey guys thanks for the props!! Yes it is true the idea came from a defibrillator. It seemed silly to me that all these guys in the db drag lanes need to have 1/2 of their vehicle full of batteries and alternators to maintain a decent B+ voltage for a few seconds. That and the fact that the amount of total energy all those batteries contain is huge and they are only using a fraction of it during their burp. It is like taking a NASCAR car to a drag race. A vehicle that is designed to go 200mph for hours on end probably isn't the best design for a 1/4 mile burst. So when you look at the way a defibrillator is used its like burping an amp. Defibrillators don't have massive power cords that need mega amps at 220V, in fact some of them are portable and run off a very small battery. Why, because they don't need to shock someone for hours at a time, just a quick burst. They just draw a small amount of power continuously during 'charge up' and once all the energy they need is accumulated they release it all at once. With the operation of the defibrillator in mind, I tried to apply it to car audio. I set off to build a prototype which was based on (2) T1500.2 output sections, I had to liquid cool the MOSFETs because even the FETs in the T1500.2's were not big enough to handle the kind of power I wanted. By keeping them very cold they could be pushed beyond their limits. (This may be the radiator ect... part of the story that someone posted). Then I needed a way to store a bunch of energy, electrolytic caps and some of the carbon based caps that are commonly used in car audio were not even close to being capable of storing the amount of energy I needed, so I used 12 small motorcycle batteries in series to get 140+ Volts. Then I built a power supply that would convert 12VDC to 140VDC to 'charge' these batteries. I got this contraption all put together the night before the Annual Rockford Fosgate Employee Sound-Off. I didn't really how much power it would make exactly, but to try to shorten this long story it ended up putting out 15,030 Watts RMS! This is how 15k Watts became the goal for a 'real' amp. The first step towards making it a 'real' amplifier was I had to eliminate the array of batteries. I began searching high and low for something that would do it. I found a company that makes capacitors for hybrid cars and large wind turbines. These worked perfectly. The caps I ended up using are 400 Farads, and there are 180 of these in the T15kW. Then I needed an intelligent power supply that could monitor these caps and add energy to them as needed, and it had to be fast, really fast if this amp was going to play music and not just a burst. So during music these caps are charging, discharging, charging, discharging. The power supply in the T15kW can charge the caps 35,000 times per second. Of course many other things had to happen like finding MOSFETs that could handle it, a way to keep it cool without antifreeze and car radiators ect. The final product met all the goals and then some. The main idea is that with this technology the amplifier can put out more power during transients or bursts than the car it's connected to could supply. Again thanks for the props, look for hybrid technology to hit our smaller amplifiers in the near future. PS if you guys would like to see pictures of the original liquid cooled proto I'll post them. This proto was eventually dubbed the D'Fibrillator. haha -------------------------------------------------------------------------------- Tony D'Amore Design Engineer Rockford Corporation how did I not see these pics before now! The only gut shot I ever saw was the cap bank. Thanks for posting Miguels, and ya know thanks Tony D for designing it

He has no need to teach you anything. He doesn't owe you anything. You don't deserve anything from him or anyone else because you have no respect for people and their efforts based upon your comments. If you have a question there are ways to ask it. These people are giving away free advice, at their leisure to people in our hobby. A little respect for their time and everyone elses on this forum would be a good thing for you. This isn't a engineering forum, he is not presenting untested findings to you. In fact I regret ever saying anything about an amplifier because of your comments.

It's bi-amped.... And probably designed for assembly. To make it a consumer ready product it needs a complete redesign. Buy a LM3886 and a toroid, enjoy your great sound on a budget I've looked at gainclones and pass lab designs before, Also the ESP and tripath designs. I don't feel comfortable with my testing abilities yet to design a noise free distortion free amp. I am learning though. EE is a pain, and really the amp is not even the expensive part, its usually the power supply. Edit: I could have said this simpler. I trust Tony D to design something of quality. I would pay for that because it saves me time and I enjoy being able to support people who do quality work. Sometimes the wallet can...sometimes not.

I love the aluminum faceplate, and heatsink idea. Any plans to offer just the amp? I would love a mini-amp or preamp that puts out 40wpc thats clean and undistorted and has that look. More and more people are looking at headphone amps too. Hope this catches on more!

I use my money to support companies and people that I feel like I can trust. Before the amp dyno I think it was pretty hard to test a amp adequately, because of that you would look at other things to see if it actually supported its claims. i would look at efficiency, THD, lowest ohm load, fusing but in actuality I was flying blind. if it doesn't do rated I am not going buy it. If a company over inflates their ratings i can't trust that they did the rest of the design correctly or safely. And my money will go elsewhere. also grossly under rating is really annoying too, however i dont get the feeling i was cheated, just makes choosing the right amp harder. Like zuki saying an amp is rated at 25wpc rms when it would most likely be closer to 100. That is just as frustrating.

dunno which was first but the notables.... my barber had a competition setup in his toyota solara, JL W7 with Boston Pro Series. Thats what made me get into car audio. Bought some MB Quart stuff when it was actually still made or manufactured in germany. And my buddy rocking two Xtant subs that were loud as hell. (relatively to someone who had never heard a system before)

tapes, first tape I had was the audio test cd for our 1990 plymouth voyager van, it had kenny loggins "danger zone" on it. Loved that thing, not even a little ashamed.

lol dat hat doe. Thats the power of the internet, global reach and everyone can appreciate quality craftsmanship. Thats awesome.

I just ran into that glove box issue with mine. May have to put mine in the kicks. Lookin good! Lemme know if you need help with the enclosure design. If I have all the T/S parameters I can mess with it in bassboxpro. It takes FOREVER though so there is that..

read up a little about sound quality of subs. It has more to do with strength of the motor and build quality then anything. But truely it doesn't mean jack if its in a crap enclosure or powered with a anemic amp. A few questions that would help to have answered so you the response you want: -how much room do you have for a enclosure? Sealed or ported? Or blow-through -What type of music do you listen to? -Are you comfortable with calculating and tuning a enclosure and have you done it before? If not or if you don't have space or tools to do so you may want something simple -What will you be powering the sub with? -Are you on stock electrical? -The big gorilla in the room, what is your budget

August 2014, Fredericksburg, VA

Either would be good. In my personal application rope would be best. I would use it on my doors.