Getting a system
Elder User
Joined: Apr 2003
Posts: 789
Likes: 0
From: Cheney, Wa
Getting a system
the class of the amplifer is it switching method, a flows a sine wave, b also does but do to the nature it uses to switch it has a notch in it during the transition from positive to negative. d also has a distrotion from switching because there is a dead time between positive and negative. also there is no half speed for a class d amp its full full power (for a given volume) or completely off. this site is pretty good about explaining them
http://www.eatel.net/~amptech/elecdisc/ampclass.htm
http://www.eatel.net/~amptech/elecdisc/ampclass.htm
Elder User
Joined: Apr 2003
Posts: 789
Likes: 0
From: Cheney, Wa
Getting a system
Originally posted by superswamper
the class of the amplifer is it switching method, a flows a sine wave, b also does but do to the nature it uses to switch it has a notch in it during the transition from positive to negative. d also has a distrotion from switching because there is a dead time between positive and negative. also there is no half speed for a class d amp its full full power (for a given volume) or completely off. this site is pretty good about explaining them
http://www.eatel.net/~amptech/elecdisc/ampclass.htm
the class of the amplifer is it switching method, a flows a sine wave, b also does but do to the nature it uses to switch it has a notch in it during the transition from positive to negative. d also has a distrotion from switching because there is a dead time between positive and negative. also there is no half speed for a class d amp its full full power (for a given volume) or completely off. this site is pretty good about explaining them
http://www.eatel.net/~amptech/elecdisc/ampclass.htm
Elder User
Joined: Mar 2003
Posts: 812
Likes: 0
From: New Canaan, CT
Getting a system
Ok I read the article and saw the graphs under the class D section but I didnt see a comparison of wave forms from each class and I didnt see in the article it specificly saying class D reproduces the waveforms square unless thats what the graphs where representing. I will look at it again tomorrow after a good nights sleep. My eyes are burning right now....lol
Postmaster
Joined: Mar 2002
Posts: 3,545
Likes: 4
From: Coal Region
Getting a system
lightning audio is indeed owned by RF and is a decent piece of equipment. only thing i personally use Crotchfield for is speaker sizes =). i always thought the different types of music/noise/sounds form different wave patterns? maybe im wrong...
Senior User
Joined: May 2003
Posts: 338
Likes: 0
From: Somewhere between Heaven
Getting a system
Originally posted by superswamper
this is what a class d sound wave looks like, before the output filter
this is what a class d sound wave looks like, before the output filter
One other thing...the link is somewhat incorrect in some of it's content. Full range Class D's are not just a myth anymore...Xtant has just released one that has absolutely no ill effects on high frequencies. It got rave reviews in one of the car audio mags (the most recent issue...don't know which mag, though) and benched very, very well. Class D can now do full range with a little ingenuity, creativity, and know-how. Time will tell if other manufacturers jump on board, but Xtant has shown it's a very real thing.
Elder User
Joined: Apr 2003
Posts: 789
Likes: 0
From: Cheney, Wa
Getting a system
like with all amps though quality shows,
in class d's it can be alittle more costly however
in class ab amps in a company goes cheap on compentents the only side effect are sound quality and an over rated power spec.
however in the class d, if the maker uses inferior compents to save cost (to sell for a lower price). not only will it not have good sound quality and underperform power wise. but the output filter may also do an inferior job in smoothing out the sound curve. thats where trouble arrises and why i wouldn't suggest using a cheap class d amp.
in class d's it can be alittle more costly however
in class ab amps in a company goes cheap on compentents the only side effect are sound quality and an over rated power spec.
however in the class d, if the maker uses inferior compents to save cost (to sell for a lower price). not only will it not have good sound quality and underperform power wise. but the output filter may also do an inferior job in smoothing out the sound curve. thats where trouble arrises and why i wouldn't suggest using a cheap class d amp.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Senior User
Joined: May 2003
Posts: 338
Likes: 0
From: Somewhere between Heaven
Getting a system
Inferior components can be used to make a Class D amp, but I've yet to come across one whose output filters didn't "do their job". Whether you speak of Pyramid or DEI, the output filters will output the correct signal/shape wave. The quality of the filters might induce noise, might have a short life, or might be inferior in every way to the filters used in "better quality" amps, but a square wave being ouput will just not happen (again, this is assumed that the amp is run under normal operating conditions). Class D techology has matured to the point that A LOT of home audio manufacturers are using them as the power source for their subs. Not just mainstream brands, but high end brands, too. There has to be something there...
Until someone shows be direct evidence that Class D amps burn up subs (a glance a the technology suggests otherwise, though), I'll disregard all this as "much ado about nothing".
Until someone shows be direct evidence that Class D amps burn up subs (a glance a the technology suggests otherwise, though), I'll disregard all this as "much ado about nothing".
Postmaster
Joined: Mar 2002
Posts: 3,545
Likes: 4
From: Coal Region
Getting a system
if a class D amp provided a square wave then it would certianly kill the woofers but like luvdef said, under normal conditions i never have heard or seen this happen. also, why would most audio manufactors recommend class D amps?
Elder User
Joined: Apr 2003
Posts: 789
Likes: 0
From: Cheney, Wa
Getting a system
Originally posted by optikal illushun
if a class D amp provided a square wave then it would certianly kill the woofers but like luvdef said, under normal conditions i never have heard or seen this happen. also, why would most audio manufactors recommend class D amps?
if a class D amp provided a square wave then it would certianly kill the woofers but like luvdef said, under normal conditions i never have heard or seen this happen. also, why would most audio manufactors recommend class D amps?
Thread
Thread Starter
Forum
Replies
Last Post
alabbasi
1987 - 1996 F150 & Larger F-Series Trucks
4
Nov 4, 2016 11:44 AM
AIS
Supercharger, Turbocharger, Nitrous Oxide & Water/Methanol Injection
1
Jan 6, 2008 07:37 AM
SunBum
Audio & Video Systems, Navigation, Satellite Radio & Mobile Electronics
2
Mar 18, 2005 02:26 PM