adreano17 Posted June 29, 2014 Report Posted June 29, 2014 Thoughs on this amp? I am impressed with the specs. Thoughs on this amp? I am impressed with the specs for the price. http://www.sonicelectronix.com/item_63974_Pioneer-GM-D8604.html Pioneer AVH-p5700DVD | MB Quart Onyx ONX4.125 | 6.5 Alpine Type-S component & 6x9 3-way | Hifonics Brutus brz1700.1d | 2 - 12" Kicker L7 | Custom box tuned to 36 hz | 220A Mechman Alternator | 1/0 OFC Welding all the way back | Big 3 | 2 Farad Tsunami Cap | Deka 9a34 | 20% Tint | 6000K HIDs | Yellow Projector Fogs | Dual Out Magnaflow
truthsayer Posted June 29, 2014 Report Posted June 29, 2014 I run this for my mids and absolutely love this thing. Running at 2 ohms, it doesnt even get warm. very efficient and clean. For the price they are hard to beat. Edit. On sale at amazon now for $122 http://www.amazon.com/Pioneer-GM-D8604-4-Channel-Bridgeable-Amplifier/dp/B00E1BRITU/ref=sr_1_1?ie=UTF8&qid=1404071586&sr=8-1&keywords=pioneer+gmd+8604 truthsayer
adreano17 Posted June 29, 2014 Author Report Posted June 29, 2014 I run this for my mids and absolutely love this thing. Running at 2 ohms, it doesnt even get warm. very efficient and clean. For the price they are hard to beat. Yeah, that's pretty much where I am. THD is .05% with decent S/N ratio. I know pioneer is not ideal anymore, but with CEA-2006 compliance, I am def leaning towards this. Budget amp as well since my polk crapped out on me. The THD is lower than an RF and JL amp o_O. No problems at all huh? Pioneer AVH-p5700DVD | MB Quart Onyx ONX4.125 | 6.5 Alpine Type-S component & 6x9 3-way | Hifonics Brutus brz1700.1d | 2 - 12" Kicker L7 | Custom box tuned to 36 hz | 220A Mechman Alternator | 1/0 OFC Welding all the way back | Big 3 | 2 Farad Tsunami Cap | Deka 9a34 | 20% Tint | 6000K HIDs | Yellow Projector Fogs | Dual Out Magnaflow
Weigel21 Posted June 29, 2014 Report Posted June 29, 2014 CEA compliance only means the amplifier can produce rated power at 4 ohms with 14.4V input and less than 1% THD. The 2 ohm power output is not given any requirements, so a manufacturer can be CEA compliant with a 50RMSx4@4 ohms/500RMSx4@2 ohm amplifier, or whatever they want to put for 2 oh output. I've only been around early class D full-range amplifiers, they colored the music too much. Newer equipment may well be much cleaner, but I still hear some claim they are not yet as clean as Class AB despite what their specs may claim.
adreano17 Posted June 30, 2014 Author Report Posted June 30, 2014 Thanks for the cea breakdown as I didn't know it really only applied to 4 ohm. But I think the current class d full range have developed a lot since you last listened. They sound pretty good. Main reason for class d is because I am stock electrical. Pioneer AVH-p5700DVD | MB Quart Onyx ONX4.125 | 6.5 Alpine Type-S component & 6x9 3-way | Hifonics Brutus brz1700.1d | 2 - 12" Kicker L7 | Custom box tuned to 36 hz | 220A Mechman Alternator | 1/0 OFC Welding all the way back | Big 3 | 2 Farad Tsunami Cap | Deka 9a34 | 20% Tint | 6000K HIDs | Yellow Projector Fogs | Dual Out Magnaflow
Weigel21 Posted June 30, 2014 Report Posted June 30, 2014 Yeah, like I said, "I" have only been around older Class D full-range amplifiers, none nothing from the past few years. Their specs have much improved, I will admit that, but I've never heard one to speak up for them or against them. I have however heard of others claiming that even the newer Mid-grade and lower Class D full-range amps still color the output, but as I said, it's merely hearsay. And yep, if you look up CEA-2006 testing standards, they mention nothing about any sort standard for measuring 2 ohm output, merely the 4 ohm output. As others on here have stated, many of the higher quality brands don't even bother with such nonsense standards. Many rate their equipment with a lower more realistic 12.5-13.8V input.
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