class d amps

[GSteg 10+ year member]

its hardly a POS. the reason why i think it didnt' survive because of the cost and demand. now they have Class T. more efficient than a Class A/B. soon i'll be using a class T myself

 

[BostonJLman 10+ year member]

Class D is more effecian ONLY at lower freq. and uses MUCH less head than a A or a B. (equals More power, less money, less heat = very good) CLass A is extreamly clean at all freq, but runs very hot, as does a class, B, but i know at least JL has made a hybrid that is just as clean and a little more heat efficient. But that is what it boils down too. i have 500 watt bass class D and 250 of the 500/5 is class AB and every time i burn my hand on the 500/5 even thought it is putting out half of the class D. and the class D doesnt burnt at all.

 

[Savant 10+ year member]

Originally posted by Larrydehp920r What in God's name is a digital amplifier. I'll tell you, there is NO such thing as a digital amplifier. Digital information from cd is in 1's and 0's right? So then a digital amplifier would give you what then.........thats right.......great big 1's and 0's . An amplifier amplifies ANALOG signals and thats it.......thats all they are capable of amplifying. Class D amps are called class D amps because class a, b, and c were already used up. What makes a class d amp special is their very fast switching power supply rails. Thats why up until this year there hasn't been a full range class d amp.

 

Larry //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

Hmm.. Binary.. on/off.. 0/1.. Digital is NOT binary, it's binary ENCODING.. That is, a DAC is a Digital/Analog Converter.. it takes a 0/1 encoded stream and converts it to a (fairly) smooth 'analog' or continously variable, wave. Just like there are DACs, there are ADCs or Analog to Digital converters.. they 'sample' at a certian rate and dump bits (0s and 1s) to "someplace".. the higher the sample rate, the more bits you get for the analog wave's conversion to digital..

Digital has many 'encoding' schemes.. for example, you can have a 24 'bit' digital media.. that gives you 16,777,216 'points' on that ouput wave form.. if you have a 2 bit media, it's only 4 places on that wave.. the more points you take from the original wave to be stored 'digitaly' the more points you have on the output wave when it's reproduced and the smoother you can re-produce it..

When you talk about 'digital amplifiers', I would presume it can either take in a 'digital' signal directly (but given all the possible encoding schemes, not that likely) or it's output is 'digital'.. meaning it sends sequential 'steps' based on the 'digital' value for a given spot/sample rate of an incomming 'analog' wave.. That means there is an ADC in the amp, running at some frequency (the faster the better, but more expensive from a hardware perspective) and sending a 'constant' voltage for a certian 'point' as opposed to continously changing voltage (wave form).. the wave form causes less stress on a woofer since most of it's movements are 'smooth'.. Class D amps are harder on the woofers since it's making 'jerky' movemnts to get from one spot to the next.. that's also why SQ suffers..

If you read any specs on D amps versus A/B amps, you will see that A/B have wave outputs, class D have what's called 'stepped' output (digital)..

Man, glad this dork was banned //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[denim 5,000+ posts]

Originally posted by Savant Man, glad this dork was banned //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

when did he get banned and what did he do to get booted?

 

[steveh]

Here's a thought ....
Why would you use a monoblock amplifier to power speakers ? It doesn't make sense to me since you're supposed to want stereo separation ...

Actually, plenty of people use monoblock in their stereos. One for the left and one for the right channel. Some of the best home stereo amps are mono's. Like Levinson and Krell. As for stereo separation, using two mono amps is the only way to get complete stereo separation. That means one channel is completly separate from the other. Man, it's like car audio is the red headed stepchild of home audio, so much bad info out there.

 

[cjjackson85 5,000+ posts]

Actually, plenty of people use monoblock in their stereos. One for the left and one for the right channel. Some of the best home stereo amps are mono's. Like Levinson and Krell. As for stereo separation, using two mono amps is the only way to get complete stereo separation. That means one channel is completly separate from the other. Man, it's like car audio is the red headed stepchild of home audio, so much bad info out there.

You do realize you're posting in old *** threads, right?

 

[JimJ 5,000+ posts]

Wow...

just wow.

 

[squeak9798 5,000+ posts]

As for stereo separation, using two mono amps is the only way to get complete stereo separation. That means one channel is completly separate from the other.

The stereo separation would still be limited by the source (CD player, etc) //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[squeak9798 5,000+ posts]

****, didn't realize the thread was closed //content.invisioncic.com/y282845/emoticons/blush.gif.99bc659ee2012b7d826165e26fb5eebe.gif