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buying subwoofer, speaker terminology?


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aznboi3644 
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Joined: May 01, 2006
Location: United States
Posted: November 28, 2008 at 12:05 AM / IP Logged  
lol "max watts"...still noob status
you are probably getting 2000 watts rms out of those amps.   No where near 11,000 watts.
Around here the regulars are actually pretty knowledgeable...max/peak watts mean nothing my friend...so if you want to flaunt how much power you have on tap talk real wattage.
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: November 28, 2008 at 10:39 AM / IP Logged  

Your Power Acoustik amps are rated at 1700 watts, and that is a stretch.  The amp contains 5 X 30-amp fuses, right?  That allows it to draw a max of 150 amps.  Assuming you have the alternator capacity to maintain 14.4 volts, @ 150 amps that is equivalent to 2160 watts.  Since the amp is class A/B, that makes it no more than 60% efficient, which means it could theoretically output 1296 watts.  Strap two together and you double that.  And since it's Power Acoustik, it's probably at about 15% distortion.

Just keeping it real.  Do you have the electrical system required to supply 300 amps at 14.4 volts?  Batteries alone won't cut it.

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audiovibe-mike 
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Joined: November 26, 2008
Location: Ontario, Canada
Posted: November 28, 2008 at 1:22 PM / IP Logged  

Ive run the same subs with a shredder. Is that real watts. Never had a problem then either.

anyways i'm not gonna drag this on. thanks for the replies I learn something every day on here.

Have you ever seen an Acura with them butterfly doors???
audiovibe-mike 
Member - Posts: 21
Member spacespace
Joined: November 26, 2008
Location: Ontario, Canada
Posted: November 28, 2008 at 1:49 PM / IP Logged  

Power Acoustik rates it 1700 at 4, 2500 at 2 and 3200 at 1, thats where i got my figures from. ya i know there all way over rated but the only thing i see that says 1700 is at 4ohms. and it says right here its a d class. they have an a/b class with the same shroud but not the one i have. i know comparing P.A. to say a JBL or what have you is like comparing an apple to an orange, but i was only stating the ratings on the box. also im not trying to "flaunt my power". i was just tryin to post on the topic with a real world example. again not trying to be a dick or whatever

Have you ever seen an Acura with them butterfly doors???
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: November 28, 2008 at 2:17 PM / IP Logged  
OK, my mistake.  If it's a Class D, then it might be up to 80% efficient, which means 1728 watts @ 14.4V X 150A.  That would be with ANY loading, and right before the amp fuses blew.  That is a real world example for ya.  So how are you powering those bad boys?
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audiovibe-mike 
Member - Posts: 21
Member spacespace
Joined: November 26, 2008
Location: Ontario, Canada
Posted: November 28, 2008 at 3:29 PM / IP Logged  

Jus with what i said. the last comp i was in they wouldn't even let me turn my car on. I only had 1 amp then tho.

honestly this car is driven like 3 months out of the year, maybe 4 if the canadian weather is good.

Listen I know you guys are right about alot of this doodie, like i said im no expert. Ive been installing for 4 years, after 6 months i was running the shop by myself, (the owner has another job). no one to help me with anything, everything ive learned has  been me, by myself in a garage. oh the owners here on saturdays and holidays but thats it.  When i have a problem I have to figure it out by myself, ( tech lines are fun, internet is helpful)

so i totally respect all of your opinions and just look forward to being a part of the community.

and i know it is a stretch to say my batteries are all charging properly, but if i take even one out its a night and day difference.

again thanks for all responses, good and bad

p.s if i could i would put another shredder in (phd2) but they are hard to find nowadays, and mine was stolen.

i loved that amp,

Have you ever seen an Acura with them butterfly doors???
aznboi3644 
Gold - Posts: 2,600
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Joined: May 01, 2006
Location: United States
Posted: November 29, 2008 at 5:08 PM / IP Logged  
sorry if I came off offensive in any way...I'm not bashing you or anything...the PA amps that I love are the older PS-520 and PS-820...very reliable amps.
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