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How to Choose an Amplifier.


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bmann_420 
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Posted: May 22, 2006 at 4:06 PM / IP Logged  
Great Thread Guys   :D  Had to let you know, so many people dont know the difference between max and RMS.... whatsoever  How to Choose an Amplifier. - Page 4 -- posted image.
bmann_420 
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Posted: May 22, 2006 at 4:08 PM / IP Logged  
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.
weedfan 
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Posted: May 22, 2006 at 7:52 PM / IP Logged  
huh?
epcenter5hz 
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Posted: May 23, 2006 at 3:55 AM / IP Logged  
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
russ lund 
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Posted: May 23, 2006 at 4:35 PM / IP Logged  
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
BigDog
bmann_420 
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Posted: May 23, 2006 at 7:29 PM / IP Logged  

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.

epcenter5hz 
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Posted: May 24, 2006 at 5:56 AM / IP Logged  
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…
perkster 
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Posted: May 27, 2006 at 12:16 PM / IP Logged  
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?
bmann_420 
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Posted: May 27, 2006 at 1:33 PM / IP Logged  
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.
perkster 
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Posted: May 27, 2006 at 1:57 PM / IP Logged  
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
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