How to Choose an Amplifier.

Great Thread Guys   :D  Had to let you know, so many people dont know the difference between max and RMS.... whatsoever 

Cant edit your posts?  Blah,  I was gonna say the funner question is, do they know what RMS means?  I know what it means, but not why or the definition of the meaning.

huh?

To find AVERAGE power you multiply peak voltage times .707. That gives RMS voltage. Then multiply peak current by .707. That gives RMS current. Now RMS voltage times RMS current gives AVERAGE power. NOTE that .707 times .707 = .499 or rounded to .5. So AVERAGE power is 1/2 of peak power

I still have a Gen XI Colossus in our display.I keep it to show up those guys that come in with that cheap junk they bought somewhere else.That amp is 600 watts RMS per channel into a 4 ohm load.It has 1800 watts bridged into a 4 ohm load and 2400 watts into 2 ohm load.That is a rock solid unit,I had a series 7 that I had to have repaired twice.I sold 2 series 8 w/o any problem.We also sold 2 XI's w/o incident.We had taken ours and bridged it down to 1 ohm(Don't do it except for 30 sec bursts) it drew between 220 and 230 amps.Use that amp you'll love it.Just feed it plenty of power and a damn good ground !!!!!!!!!!!!!!!   RussBigDog

epcenter5hz wrote: To find AVERAGE power you multiply peak voltage times .707. That gives RMS voltage. Then multiply peak current by .707. That gives RMS current. Now RMS voltage times RMS current gives AVERAGE power. NOTE that .707 times .707 = .499 or rounded to .5. So AVERAGE power is 1/2 of peak power

Thanks bud, always good to know that one.  Just gatta remember it thats all.

russ lund wrote: I still have a Gen XI Colossus in our display.I keep it to show up those guys that come in with that cheap junk they bought somewhere else.That amp is 600 watts RMS per channel into a 4 ohm load.It has 1800 watts bridged into a 4 ohm load and 2400 watts into 2 ohm load.That is a rock solid unit,I had a series 7 that I had to have repaired twice.I sold 2 series 8 w/o any problem.We also sold 2 XI's w/o incident.We had taken ours and bridged it down to 1 ohm(Don't do it except for 30 sec bursts) it drew between 220 and 230 amps.Use that amp you'll love it.Just feed it plenty of power and a damn good ground !!!!!!!!!!!!!!!   Russ

Thanks for the input… I’m from the old school too (been into car audio since 1989 & got completely involved in 1993). It’s hard to find any documented credible specs on the XI colossus’s… but I tell you what… I’ve seen one of these old school colossus in actions in 1996… a guy had 2 very long colossus in a mini van (I’m not sure what series it was) but he had it on 4 18” original “Hart” subs on an epicenter… & it sounded almost as loud as a train wreck coming down your block… this dude was sick because he hade a DB drag power levels & SPL as his daily driver with 2 colossus, but was tuned better for listening & not competing…

soooo if i have an 2 channel amp with an RMS of 200W x 2 and bridge it, how much juice should i be able to get out of it?

The RMS Rating.  If you did one channel, you would get 100 watts rms if the ohm load is right also.  And if you bridge it, you will get the true 200 watts.  If it is to 2 speakerrs it will be 100 each if its wired right, or 200 to one.

thank you, i never understood bridging really i've got two 12" DVC subs at 600 watt rms and 4 ohms if i buy a 4 ohm mono amp to run both of them, how many watts do i need? is it 1200 or 600