is it safe to hook up a 1000 watt peak power monoblock amp to a pair of 250 watt crossfire db3 subs?

Question

i want to purchase a 1000 watt peak power monoblock amp by ma audio and connect it to my pair of crossfire db3 12 inch subs im not sure on their power rating. i could not find info on my subs on the internet, but they are older ones like from 2002 or somethin. but i wanted to know if its safe to hook them up and also hook my interfire 400watt 4 channel amp to my 4 speakers up front. please help i dont wnt to get taken advantage of at the car audio installation place lol!

Answer 1

no, you will blow the subs if you hook 2 of those subs up to that 100watt amp cuz if the subs are 250rms watts, that means the pair of 500rms watts and that amp will give off 1000rms to that load that you use which is giving 500more watts than it should give off which means your subs will be over-powered and they will eventually blow, maybe in 1-2 weeks time. you want a 500watt mono amp. such as the alpine mrp-m500, it puts out 500rms watts @ 2 ohms, which is what your subwoofer load needs.







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actually clint:



a 1000rms watt amp would be around 500-600rms @ 4 ohms, but at 2 ohms it is 1000 rms watts, that is how mono block amps work, the number of watts that it shows is that output @ 2 ohms, its that way with ALL mono-block amps unless of course it is 1 ohm stable, which 80% of mono block amps are not 1 ohm stable.





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also NEVER set the gain by ear, do it this way:



Here is a guide that will help you set the gain correctly http://www.box.net/shared/uchv4dbk88



You'll need a multi-meter (AC voltmeter, $15 from Radio$hack), Microsoft Excel and a way to burn an audio CD from an MP3.



If you don't have Excel, use this link http://www.box.net/shared/nkkw1dhk4g



Set the LPF to just below the highest range of the frequency response of the subs. Meaning if the frequency response of the sub is 20-200Hz, set the LPF to about 180Hz.



Set the subsonics filter to about the same as the lowest setting in the range of the frequency repsonse of the subs. Meaning about 20Hz if that's the lowest in the range (20 -200Hz as above, if applicable).



Don't set the Bass Boost above +2dB







the reason you dont set the gain by ear because clipping in subs starts WAYY before the ear can even dectect it, the sub can be clipping for hundreds of frequencies before the ears can hear it.

Answer 2

Peak power and rms power are way different..



Peak power shouldn't even be looked at, 1000 watt peak power monoblock amp is probably around 600 rms, of course its safe to hook them up amps are made with gain control so you can turn them down.

You can hook up another amp to your front speakers no problem.



You want to make sure you wire the subs up at the correct ohms for the amp. see http://www.the12volt.com/caraudio/woofer_configurations.asp for wiring diagrams.



if the amp is http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=14734 this one its saying its 1 ohm stable with 1000w rms not 1000w peak power. Not sure which amp exactly you are looking at but remember to look at rms power more so than peak power when choosing an amp... Class D CEA compliant amps are the best to have.



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Thanks edward... I use an oscilloscope and multimeter to personally set my gains. Are all monoblocks cea compliant if not that means your statement is incorrect. Not saying you are wrong on any of that but some off brands will say 1000w on them when its 1000w peak power when its only like 200w rms which is really what you need to care about.



Edward is correct you should use an oscilloscope or multimeter or both to adjust your amp if available.

Answer 3

Are you particular that amp is 1000 watts? Is is bridgeable? From what you're asserting, your audio gadget could desire to be completely great. with out understanding even if if or no longer your amp is bridgeable, my suggestion could be so you might hook the amp directly to the audio gadget. One speaker on each and each channel. each and each channel will in simple terms be pulling one hundred ten watts (from what you have suggested) So 3 hundred watt audio gadget would be waiting to handle one hundred ten watts in simple terms great, and if their 60 watts rms, then that one hundred ten watts (max) could desire to have them sounding like their meant to.