Mike Gibbens Matthew Posted May 9, 2014 Report Share Posted May 9, 2014 I am looking into the Crescendo S800\4 and some Crescendo Mezzo comps. I didnt realize the S800\4 was a class D amp How much of a difference is there between class D and class AB? I will also be ordering a Pioneer DEH-80PRS Specs for the 800\4 are here http://store.crescendoaudio.com/symphony-s1500-1/ 07 KIA Spectra 320a Singer Alt Odyssey Extreme batteries 2 12" Phantom sounds (4.6 cu. net @ 32) - soon to be 2 Atomic ELE 2 Rockford Fosgate T2500bd-CP Zapco Z150.2 Front comps soon to be Hertz HSK Pioneer 80prs Second skin deadener throughout Link to comment Share on other sites More sharing options...
Krakin Posted May 9, 2014 Report Share Posted May 9, 2014 I'll be back later to tell you, but I got a tornado right now. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
bigmizzle99 Posted May 9, 2014 Report Share Posted May 9, 2014 Between what 2? Camaro SS Build Altima build 2.0 Altima build 1.0 Link to comment Share on other sites More sharing options...
Skullz Posted May 9, 2014 Report Share Posted May 9, 2014 http://www.zedaudiocorp.com/index.php/tech-talk/amplifier-classes.html 01 Ford focus ZX3 Pioneer AVH-X491BHS PPI PC 4800.2 Morel Maximo 6.5" x2 Link to comment Share on other sites More sharing options...
oldsoundguy Posted May 9, 2014 Report Share Posted May 9, 2014 I'll be back later to tell you, but I got a tornado right now. Holy crap dude. Hold on..... 80prs Arc Audio Xdi 1200.6 (using active crossovers) Freaking awesome amplifier Incriminator IA 10.1 Focal PS 130v 5.25 (doors) 4" Faital pro Neo (kick panels) 3" Faital pro Neo and focal tweets( dash) DC Audio level 3 12" custom box designed by joex built by me AGM front, XS 750SE batteries rear DC 180 alt 99 Toyota Tacoma extra cab http://www.stevemeadedesigns.com/board/topic/179476-my-small-build-turned-into-the-ongoing-build/ Link to comment Share on other sites More sharing options...
Mike Gibbens Matthew Posted May 9, 2014 Author Report Share Posted May 9, 2014 NO NADOS!!!!! Be safe man! So after reading the Zed info I think I understand. Is the difference in sound quality going to be that noticeable? I am not trying to compete in SQ or anything, but my wife is putting together a top notch SQ system to compete with. I dont want to get into my car after being in hers and have it sound like total dog shit. 07 KIA Spectra 320a Singer Alt Odyssey Extreme batteries 2 12" Phantom sounds (4.6 cu. net @ 32) - soon to be 2 Atomic ELE 2 Rockford Fosgate T2500bd-CP Zapco Z150.2 Front comps soon to be Hertz HSK Pioneer 80prs Second skin deadener throughout Link to comment Share on other sites More sharing options...
Krakin Posted May 9, 2014 Report Share Posted May 9, 2014 Class-A: http://sound.westhost.com/class-a.htm Class-D: http://sound.westhost.com/articles/pwm.htm As for Class-AB, the wave through the transistors is between 181o-365o. The major downfall of Class-D amplifier design is the pulse width modulation, with this the amplifier a high frequency square wave is modulated along side the actual audio signal to turn on and off the power supplies. This wave typically is between 100kHz - 1MHz. At the very end of the output stage of the amplifier there will be a signal filtering circuit set in place as to lower signals above 20kHz. However, even though they are put through a filter, that doesn't mean they no longer exist. This is how a typical Class-D signal looks when being sent to the output transistors. I'll get more into Class-AB technology as I can with this weather. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
shogen Posted May 9, 2014 Report Share Posted May 9, 2014 curious... why are you using a 80prs and mezzo components and then worried about ab vs d? you won't probably notice a things of a difference.... maybe with power used or "volume" .... I'm a bit perplexed w/ your proposed setup I am looking into the Crescendo S800\4 and some Crescendo Mezzo comps. I didnt realize the S800\4 was a class D amp How much of a difference is there between class D and class AB? I will also be ordering a Pioneer DEH-80PRS Specs for the 800\4 are here http://store.crescendoaudio.com/symphony-s1500-1/ Pioneer Premier P880PRS ll Front Stage: US Acoustics 4060 - Random speakers currently ll Sub Stage: Crescendo BC3500D - 15" Xcon sealed @ 3.28 cubes ll Electrical: - Kinetik HC1800(front) NEW***DieHard P-2(rear) beaker- I know this sounds like a lot of anime bullshit, but it is true. Link to comment Share on other sites More sharing options...
Krakin Posted May 9, 2014 Report Share Posted May 9, 2014 Note that the first link I sent is a write-up on Class-A technology, not Class-AB. Class-A will send the full wave through the output transistors, while Class-B will send 180o of the wave to one set of transistors and the other 180o to the other transistors, as the wave switches sine the other transistors will turn on and the last will turn off. With Class-AB you will get somewhere between the two angles, most likely the companies don't specify the angle and sometimes end up just being Class-B amps anyway. Don't get the turn on and off of the transistors in Class-AB and Class-B confused with the power supply switching of the Class-D technology. No extra waveform is introduced to the signal along the way. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
Mike Gibbens Matthew Posted May 9, 2014 Author Report Share Posted May 9, 2014 Not sure what you are asking shogen. @ krakin - I see how the signal differs between the two. Thanks for the picture it makes my brain happy So now, is the difference going to be audible? I am running about 1000w rms substage if that makes a difference 07 KIA Spectra 320a Singer Alt Odyssey Extreme batteries 2 12" Phantom sounds (4.6 cu. net @ 32) - soon to be 2 Atomic ELE 2 Rockford Fosgate T2500bd-CP Zapco Z150.2 Front comps soon to be Hertz HSK Pioneer 80prs Second skin deadener throughout Link to comment Share on other sites More sharing options...
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