16 subs 1 amp
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=115430
Printed Date: May 03, 2024 at 12:45 AM
Topic: 16 subs 1 amp
Posted By: gauge010
Subject: 16 subs 1 amp
Date Posted: August 02, 2009 at 8:12 PM
Is it possible to wire 16 Rockford Fosgate P1S410's to a Rockford T2500-1bd? The specs say 75% efficiency at 1 ohm so would that mean 12 of the Rockford Fosgate P1S410's can be wired to that same amp? :)
Be nice guys. I'm new at these multi-sub setups. :)
Replies:
Posted By: haemphyst
Date Posted: August 02, 2009 at 8:26 PM
Efficiency has nothing to do with how many subs can be connected to an amplifier. You could wire 16 THOUSAND subs to one amplifier, as long as you keep the resultant load above the amplifier's minimum operating impedance.
That being said, yes, you can wire as many of those woofers to that amp as you have airspace for.
Wire 4 of them into one set for a total load of 4 ohms.
Repeat three more times
Parallel those four 4-ohm SETS to the outputs for 1 ohm total, final load.
Your total power to the woofers will be approximately a CLAIMED 150 watts, each. I say it like that, because RF tends to... well, let's just say... "exaggerate" a bit, on their power outputs. Although they are not as bad as SOME manufacturers out there, they don't make all the power they claim that they do.
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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: gauge010
Date Posted: August 03, 2009 at 12:45 AM
haemphyst wrote:
Your total power to the woofers will be approximately a CLAIMED 150 watts, each. I say it like that, because RF tends to... well, let's just say... "exaggerate" a bit, on their power outputs. Although they are not as bad as SOME manufacturers out there, they don't make all the power they claim that they do.
Thanks for the reply haemphyst. Now if I found a more...say..."trustworthy" amp that does give me 150w to each wofer, I guess(for arguments sake) it would be ok to do it. But whats the downside?
Posted By: yimke
Date Posted: August 03, 2009 at 9:17 AM
Why are people even asking these questions? I want 25 subs to one amp! It is possible, do the math yourself, and if you can't figure it out you shouldn't even be messing with that many subs in the first place!! 1 or 2 is fine for the average person.
Posted By: imupabove
Date Posted: August 03, 2009 at 12:36 PM
it is his life
Posted By: gauge010
Date Posted: August 03, 2009 at 12:48 PM
Yes it is as a matter of fact I did do the math and it added up. It was a question sparked out of mere curiosity. I thought this was a forum? Like I said "I was new to this multi-sub stuff." I didnt say i was new to car audio. Somebody's gotta start somewhere right?
Average person...Pffff! Whatever dude...
Posted By: vibrationcustum
Date Posted: August 03, 2009 at 1:35 PM
gauge010 wrote:
Yes it is as a matter of fact I did do the math and it added up. It was a question sparked out of mere curiosity. I thought this was a forum? Like I said "I was new to this multi-sub stuff." I didnt say i was new to car audio. Somebody's gotta start somewhere right?
Average person...Pffff! Whatever dude...
This is a forum for answers but 10 subs is kind of out of the ordinary unless you have a one big massive amp. But it can be done and I have seen it done may times. I like the forum here and If people done know the answer to the question then don't answer.
------------- Can't be loud then don't have it.
(power acoustik system)
Head unit- TID-896 7" TOUCHSCREEN
ovn1-5500d 09 and another one coming soon
4-12" mofos 12ft3 box to 40hz (wall)
2 batterys, 1 power
Posted By: DYohn
Date Posted: August 03, 2009 at 2:07 PM
I once ran a demo array of 12 x 15" subs on a single 100 watt amp. It has nothing to do with the size of the amp. As was already stated, you can connect 16 thousand speakers to any amp you want as long as the amp will handle the impedance. ------------- Support the12volt.com
Posted By: vibrationcustum
Date Posted: August 03, 2009 at 3:42 PM
I see what you are stating. I never said that he could not do it but thanks for the info
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Can't be loud then don't have it.
(power acoustik system)
Head unit- TID-896 7" TOUCHSCREEN
ovn1-5500d 09 and another one coming soon
4-12" mofos 12ft3 box to 40hz (wall)
2 batterys, 1 power
Posted By: fish chris
Date Posted: August 04, 2009 at 12:26 AM
I agree with Haemphyst, that yes, of course it can be done. But I disagree that RF amps are overated. On the contrary, they are quite "underated". My RF Power 1000 25 to Life will tell you in the spec sheet that it puts out 50 wts RMS x 4, into 4 ohms.... but the birth sheet, with bench testing for my exact amp, shows 111 wts RMS x 4ch into 4 ohms ! I don't care if they tested it at 14.2 volts and my truck is running at 12.8.... or if they are rating it at 1% distortion, and you only care about .5% distortion. No matter how you slice it, my amp is putting out more than the 50 wts RMS x 4ch into 4 ohms that RF states. Then RF says the sub channel on my amp puts out 600 wts RMS into 2 ohms (while my birth sheet shows 705) and 800 wts RMS into 1 ohm (while my birthsheet shows 935). That T2500-1bd is a bad ass amp that while RF claims it puts out 2500 wts RMS into 1ohm, is actually more like 3300 - 3500 wts RMS..... in fact, I just saw these numbers in an independant test for this exact amp, on another forum. Peace, Fish
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