posted
Hopefully some of the SoundDigital guys can help answer this for me...
Looking around, you find that pretty much all other amplifier boards claiming to do over 5K RMS are 30"+ long, and won't do rated power till at least 14V, if not 16V or more.
Then you have these SoundDigital amps that are half that size claiming to put out 8K RMS at 12.6V.
My question is - what is SoundDigital doing differently than everyone else... and furthermore, WHY isn't anyone else doing it? Is it some form of pateneted technology by SD? Are the SD numbers inflated and unrealistic? The SD amps claim to be normal class D architecture - if the technology exists to do so, doesn't it stand to reason that someone else would be making small class D amps that do big numbers on 12V as well?
Not trying to be negative at all... the amps look great, just curious.
posted
I think SD uses bigger fets that are probbaly capable to do more current. All the other amplifiers uses fets with less current when u put a lot parralel you can split the current and get also big power outputs.
--------------------
Team Bemi - Peter, Tim en Tim street-A Alpine 9812RB Headunit 1X12" CS MK1 Kevlar CS elt12 Amplifier Battery Oddysee
Dutch Champion 2005 155.4DB 2006 Street-B 157DB 2007 Street-A 156.9DB spring break 2008 Street-A 157.7DB 2009 Street-A 158.4DB spring break 2009 Street-A 159.1DB NRW Meistershaft Posts: 537 | From: Holland | Registered: Mar 2006
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posted
i think most amps use 30/40 fets, and they are using somethinglike 90/200's. That means you need a lot less trannies to get the same power, which means you don't need as long of an output pcb. but the parts do cost more. the boards may have thicker traces for better current flow, and better efficiency, which means they make less heat by wasting less energy. there's up to 4 cooling fans on them so they require significantly less heatsink. i believe murilo also mentioned using an h-class topology. having proper powersupply caps in the case allows for better performance when the voltage drops.
thats what comes to mind right now. just some ideas
Posts: 5894 | From: Columbus, OH - formerly FL | Registered: Oct 2003
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posted
There was another company ding high power with smaller amps, But from what I have learned is that the boards were not built to handle the current flow, and some of the internal components were low grade, so alot of amps made smoke.
The SD amps use high grade, and high current components, mixed with an extrememly fast microprocessor.
-------------------- Dream, Plan, Build
T3 Audio really does make the best subwoofers, we just want to let the world know it.
We use powerful mosfets in a H-bridge output stage fed by a high-voltage power supply. The main reasons for having the smallest sizes in world are the use of the high-power FETs and a lot of work on layout (making components near each other helps a lot on overall performance).
In fact this was a superficial explanation of the PWM power supply, and this is a huge engineering on the amps, because cost us some years of development, mainly because we decided to make the amps almost completely controlled by a microprocessor, and not by separate controllers that became slow for us.
The pulse controlling made the amps capable of working down to 7.5V and up to 18V, we already tested in voltages higher than 20V at factory. In a non-PWM power supply the output FETs and whole circuitry would blow with the extra voltage generated.
quote:Originally posted by HsOffRoad: Hopefully some of the SoundDigital guys can help answer this for me...
Looking around, you find that pretty much all other amplifier boards claiming to do over 5K RMS are 30"+ long, and won't do rated power till at least 14V, if not 16V or more.
Then you have these SoundDigital amps that are half that size claiming to put out 8K RMS at 12.6V.
My question is - what is SoundDigital doing differently than everyone else... and furthermore, WHY isn't anyone else doing it? Is it some form of pateneted technology by SD? Are the SD numbers inflated and unrealistic? The SD amps claim to be normal class D architecture - if the technology exists to do so, doesn't it stand to reason that someone else would be making small class D amps that do big numbers on 12V as well?
Not trying to be negative at all... the amps look great, just curious.
Hans
Hello Hans
To copy our amps is pretty hard since the amps use a recorded microprocessor and you cant open the program once it is burned on the IC. And we put most of the tasks on the microprocessor, like protections, PWM, etc.
But I would bet in 1 or 2 years some companies will start to make "similar" engineering. We didn't created H-bridge or PWM, it is open to all, but a amp capable of what a SD8000 can do, with that size, we dare all other to make it.
posted
Thanks guys (Jacob especially for the link...),
That clears some things up. Reading through the link, I gather that the pulse width modulation control is something along the lines of what the crowns/jl have going on to stabilize output at different voltages. However as I understand it, those amplifiers are more or less impedance indifferent. The SD products seem to make more power at lower impedances, like a conventional amp.
Hans
-------------------- "Shut Up And Wheel Your Junk!" Posts: 94 | From: Media, PA | Registered: May 2007
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quote:Originally posted by murilo@soundigital.com.br:
quote:Originally posted by HsOffRoad: Hopefully some of the SoundDigital guys can help answer this for me...
Looking around, you find that pretty much all other amplifier boards claiming to do over 5K RMS are 30"+ long, and won't do rated power till at least 14V, if not 16V or more.
Then you have these SoundDigital amps that are half that size claiming to put out 8K RMS at 12.6V.
My question is - what is SoundDigital doing differently than everyone else... and furthermore, WHY isn't anyone else doing it? Is it some form of pateneted technology by SD? Are the SD numbers inflated and unrealistic? The SD amps claim to be normal class D architecture - if the technology exists to do so, doesn't it stand to reason that someone else would be making small class D amps that do big numbers on 12V as well?
Not trying to be negative at all... the amps look great, just curious.
Hans
Hello Hans
To copy our amps is pretty hard since the amps use a recorded microprocessor and you cant open the program once it is burned on the IC. And we put most of the tasks on the microprocessor, like protections, PWM, etc.
But I would bet in 1 or 2 years some companies will start to make "similar" engineering. We didn't created H-bridge or PWM, it is open to all, but a amp capable of what a SD8000 can do, with that size, we dare all other to make it.
were gonna try and push ya a lil bit Murilo. I think were real close with our Inferno 8.1. keep pushing the limits Murillo I like what your doing David @ Diablo Audio Technologies
quote:Originally posted by murilo@soundigital.com.br:
quote:Originally posted by HsOffRoad: Hopefully some of the SoundDigital guys can help answer this for me...
Looking around, you find that pretty much all other amplifier boards claiming to do over 5K RMS are 30"+ long, and won't do rated power till at least 14V, if not 16V or more.
Then you have these SoundDigital amps that are half that size claiming to put out 8K RMS at 12.6V.
My question is - what is SoundDigital doing differently than everyone else... and furthermore, WHY isn't anyone else doing it? Is it some form of pateneted technology by SD? Are the SD numbers inflated and unrealistic? The SD amps claim to be normal class D architecture - if the technology exists to do so, doesn't it stand to reason that someone else would be making small class D amps that do big numbers on 12V as well?
Not trying to be negative at all... the amps look great, just curious.
Hans
Hello Hans
To copy our amps is pretty hard since the amps use a recorded microprocessor and you cant open the program once it is burned on the IC. And we put most of the tasks on the microprocessor, like protections, PWM, etc.
But I would bet in 1 or 2 years some companies will start to make "similar" engineering. We didn't created H-bridge or PWM, it is open to all, but a amp capable of what a SD8000 can do, with that size, we dare all other to make it.
were gonna try and push ya a lil bit Murilo. I think were real close with our Inferno 8.1. keep pushing the limits Murillo I like what your doing David @ Diablo Audio Technologies
posted
Not to jack the thread but for most of us americans this is the first year we have heard of sound digital. How long has this company been making amplifiers in Brazil????
-------------------- 12 VOLTS BABY!!!!! TEAM STETSOM USA & SALES REP TEAM STINGER BUY OHIO GENERATORS WORLD FINALS COMPETITOR 2005,2006,2008,2009 SUPER STREET 1-2 CERTIFIED 161.0 DB MARYLANDS LOUDEST DAILY DRIVER N.S.P.L. STATE RECORD HOLDER 2005,2006,2007,2008,2009 TEAM USAudio Stetsom Sales and Service stetsomrep1@hotmail.com Posts: 2378 | From: Maryland | Registered: Oct 2005
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quote:Originally posted by murilo@soundigital.com.br:
quote:Originally posted by HsOffRoad: Hopefully some of the SoundDigital guys can help answer this for me...
Looking around, you find that pretty much all other amplifier boards claiming to do over 5K RMS are 30"+ long, and won't do rated power till at least 14V, if not 16V or more.
Then you have these SoundDigital amps that are half that size claiming to put out 8K RMS at 12.6V.
My question is - what is SoundDigital doing differently than everyone else... and furthermore, WHY isn't anyone else doing it? Is it some form of pateneted technology by SD? Are the SD numbers inflated and unrealistic? The SD amps claim to be normal class D architecture - if the technology exists to do so, doesn't it stand to reason that someone else would be making small class D amps that do big numbers on 12V as well?
Not trying to be negative at all... the amps look great, just curious.
Hans
Hello Hans
To copy our amps is pretty hard since the amps use a recorded microprocessor and you cant open the program once it is burned on the IC. And we put most of the tasks on the microprocessor, like protections, PWM, etc.
But I would bet in 1 or 2 years some companies will start to make "similar" engineering. We didn't created H-bridge or PWM, it is open to all, but a amp capable of what a SD8000 can do, with that size, we dare all other to make it.
were gonna try and push ya a lil bit Murilo. I think were real close with our Inferno 8.1. keep pushing the limits Murillo I like what your doing David @ Diablo Audio Technologies
didnt someone just blow a bunch of these amps up right outa the box?
and 28 inches long is about as long as a 8000sd and a 4 channel they make next to it
Posts: 25 | From: in the middle of nowhere | Registered: Apr 2009
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quote:Originally posted by kraven moorehead: Not to jack the thread but for most of us americans this is the first year we have heard of sound digital. How long has this company been making amplifiers in Brazil????
I'd say people had heard of them last year too...
I had an SD8000 that I almost used for finals. (used a different amp due to voice coil config)
-------------------- Team 2loud4you Stef's Crazy Team International
quote:Originally posted by Andy Jones: This is why abortion should be allowed until the 300th trimester.
posted
SounDigital started making D class amps in 1996 and during 3-4 years the amps were only known in the state were company is placed, the Rio Grande do Sul, in the south.
quote:Originally posted by kraven moorehead: Not to jack the thread but for most of us americans this is the first year we have heard of sound digital. How long has this company been making amplifiers in Brazil????
I'd say people had heard of them last year too...
I had an SD8000 that I almost used for finals. (used a different amp due to voice coil config)
send me battz bish... that is all..
slowly walks away......................
-------------------- I'm strapped u strapped lets play 2 on 2 Posts: 3011 | From: 127.0.0.1 | Registered: Sep 2001
| IP: Logged |
quote:Originally posted by kraven moorehead: Not to jack the thread but for most of us americans this is the first year we have heard of sound digital. How long has this company been making amplifiers in Brazil????
I'd say people had heard of them last year too...
I had an SD8000 that I almost used for finals. (used a different amp due to voice coil config)
send me battz bish... that is all..
slowly walks away......................
who let you outta OT?!
I run Street A... so no battz to share
-------------------- Team 2loud4you Stef's Crazy Team International
quote:Originally posted by Andy Jones: This is why abortion should be allowed until the 300th trimester.
quote:Originally posted by murilo@soundigital.com.br: SounDigital started making D class amps in 1996 and during 3-4 years the amps were only known in the state were company is placed, the Rio Grande do Sul, in the south.
thanks for the history Murilo i was just wondering how long that SD has been in business, are you back in the US yet?
steve
-------------------- 12 VOLTS BABY!!!!! TEAM STETSOM USA & SALES REP TEAM STINGER BUY OHIO GENERATORS WORLD FINALS COMPETITOR 2005,2006,2008,2009 SUPER STREET 1-2 CERTIFIED 161.0 DB MARYLANDS LOUDEST DAILY DRIVER N.S.P.L. STATE RECORD HOLDER 2005,2006,2007,2008,2009 TEAM USAudio Stetsom Sales and Service stetsomrep1@hotmail.com Posts: 2378 | From: Maryland | Registered: Oct 2005
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quote:Originally posted by kraven moorehead: Not to jack the thread but for most of us americans this is the first year we have heard of sound digital. How long has this company been making amplifiers in Brazil????
I'd say people had heard of them last year too...
I had an SD8000 that I almost used for finals. (used a different amp due to voice coil config)
send me battz bish... that is all..
slowly walks away......................
who let you outta OT?!
I run Street A... so no battz to share
i was looking for the bathroom and got lost..
-------------------- I'm strapped u strapped lets play 2 on 2 Posts: 3011 | From: 127.0.0.1 | Registered: Sep 2001
| IP: Logged |
posted
murilo its jim in cali im trying to get a hold of you so i can buy some amps ,give me a call please
Posts: 14 | From: san carlos ca | Registered: May 2009
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