Class A/B vs. Class D power for Subs

[atoz350 10+ year member]

What you said was totally false. Both run a full 360 deg drive. There is no more potential for excursion with one over the other. Quit trying to play like you know what you are talking about.

Please look at the damping factor of any class A/B amplifier verses a comparable class d. The A/B simply has more control over the driver. Similarly take a driver and connect it to a class A amp and push lightly on the cone. It won't move. The higher current classification has more control of the driver. What I said is true and I do know what I am talking about. Its not your answer, but it is true. I'm not here to spread misinformation.

 

[jrouter76 10+ year member]

What you said was totally false. Both run a full 360 deg drive. There is no more potential for excursion with one over the other. Quit trying to play like you know what you are talking about.Not at all what I'm saying. What I will say is that the distortion of a Class D amp worth owning will be inaudible, especially on subs.

I`m gonna use the xenon x200.4 on an active frontstage ,thanks to you and squeak for clearing the air of misinformation that has been filling the air about class d and class a/b amps.

 

[helotaxi 5,000+ posts]

Please look at the damping factor of any class A/B amplifier verses a comparable class d. The A/B simply has more control over the driver. Similarly take a driver and connect it to a class A amp and push lightly on the cone. It won't move. The higher current classification has more control of the driver. What I said is true and I do know what I am talking about. Its not your answer, but it is true. I'm not here to spread misinformation.

Once again you proove my point. Quit making even more of an *** of yourself and just shut up. Except with the cheapest of the Class D amps, the damping factor is more than high enough to not be an issue. There are also Class A/B amps out there that have a terrible damping factor.

Similarly take a driver and connect it to a class A amp and push lightly on the cone. It won't move. The higher current classification has more control of the driver.

Again I must ask, "WTF are you going on about?" Higher current classification. WTF is that? Certainly isn't a term I've ever heard of. Also current capability has no bearing on amplifier class only power output and load. Once again your argument doesn't add up and is complete crap. You have not said one thing yet that is true. Quit trying to use big words

 

[JimJ 5,000+ posts]

Similarly take a driver and connect it to a class A amp and push lightly on the cone. It won't move.

*does so*

It moves!

Oops.

This thread makes me giggle.

 

[tRiGgEr 5,000+ posts]

LOLers @ atoz350 and Ca.com

 

[theCybe 5,000+ posts]

.: connects terminals with a 2" piece of wire :.

.: push :.

Well, then.

Hmm. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[96GTIVR6 10+ year member]

what you need is a pair of diamond D7 amps. //content.invisioncic.com/y282845/emoticons/up2something.gif.dd110ecf3ae4b76050d87598f2f8de7c.gif

Trust me, I asked when I called Diamond today to find out if they had any D7's hidden somewhere...

The dampning factor of the D61500.1 is 105 at 50hz (IIRC I left the paper I wrote it down on at work)

Is this a decent number? Again thanks to helotaxi, Jim, and Squeak for their very productive and informative input.

 

[JimJ 5,000+ posts]

Is this a decent number?

For a SS amp, you could cut that number in half and I doubt you'd hear an audible diffference...//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[96GTIVR6 10+ year member]

For a SS amp, you could cut that number in half and I doubt you'd hear an audible diffference...//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Thanks Jim, I read an article on damping factor a while ago in a link that was posted here on the forum and it had me quite confused.

On a side note (sorry to get halfway off topic in my own thread, but hey sue me) is 260 @ 1k good for my 4 channel? I'm pretty sure they said any number over 100 starts to sound the same in the article but it was a while ago I read it

 

[zfactor 10+ year member]

omg what an a@s......

"Class A/B amplifiers have 240 degree articulation compared to Class D that only has 180 degree. What that means is that a Class D to save power, only controls the speaker cone one way. A class A/B amp has the ablility to move the cone more since it moves both ways. One way at max excursion, then the other way at half of max excursion. This gives it more control of the woofer at a trade for higher current."

wow he should also say "i eat glue" maybe that would explain.....

 

[JimJ 5,000+ posts]

Thanks Jim, I read an article on damping factor a while ago in a link that was posted here on the forum and it had me quite confused.On a side note (sorry to get halfway off topic in my own thread, but hey sue me) is 260 @ 1k good for my 4 channel? I'm pretty sure they said any number over 100 starts to sound the same in the article but it was a while ago I read it

Don't worry about it //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Worrying about DF in solid state amplifiers in most normal cases is about as productive as trying to figure out how women think. Sure, you can do it, but the mental effort is best spent elsewhere...

Now, if you're driving 200 foot runs of speaker wire, or using single ended output stages with really high output impedances, DF may be a little more important to consider.

 

[iagrdshaka 5,000+ posts]

Class A/B amplifiers have 240 degree articulation compared to Class D that only has 180 degree. What that means is that a Class D to save power, only controls the speaker cone one way. A class A/B amp has the ablility to move the cone more since it moves both ways. One way at max excursion, then the other way at half of max excursion. This gives it more control of the woofer at a trade for higher current.

//content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif

I wish I had room in my sig for this. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[squeak9798 5,000+ posts]

I'm not here to spread misinformation.

Then STFU and GTFO, because that's all you are doing

//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[squeak9798 5,000+ posts]

There are also Class A/B amps out there that have a terrible damping factor.

Phass Audio had/has an A/B amplifier that has a damping factor of .2 (yes, two tenths).

Even Richard Clark was wiggin' out about that one //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[squeak9798 5,000+ posts]

For a SS amp, you could cut that number in half and I doubt you'd hear an audible diffference...//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

//content.invisioncic.com/y282845/emoticons/iagree.gif.15d6c075ee8d3913ba26866d06993068.gif

Damping factor is completely overrated.

Basically any quality non-tube amplifier (that's not specifically designed to have an obsurdly low damping factor) will have a DF high enough to not cause an audible difference in sound.