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1ohm stable amps

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=12367
Printed Date: June 10, 2024 at 9:25 PM


Topic: 1ohm stable amps

Posted By: wvsquirrel
Subject: 1ohm stable amps
Date Posted: April 18, 2003 at 12:42 AM

Anyone know if the Rockford Power 500bd amp is 1ohm stable? I know it's stable to 2ohms (which is how I currently have it), but I can't find anything (even in the manual) about anyone running one at 1ohm. I just blew both my RFP3412's, so I think its finally time for an upgrade. I really don't have the $ for 2 RFD2212 (4ohm DVC) or 2 RFD2112 (2ohm DVC) HX2's and another amp (either a Power 1000bd or another Power 500bd), so I'm faced with a delima.

Option 1
Get the 2 RFD2212's and run them @ 1ohm for now (praying the 500bd is 1ohm stable), and save for the second 500bd (then run 1 sub/amp @ 2ohms each safely)

Option 2
Get the 2 RFD2112's and run them @ 2ohms from my 500bd until I can afford the Power 1000bd.

Either way, in the meantime I'd only be pushing apx. 350watts to each sub (which are rated at 500RMS). I get nervous about underpowering subs if there is more than 100watts difference between the amps output and the RMS rating. Here I'm looking at 150watts minimum difference.

The subs (both the RFD2212's and RFD2112's) are 500RMS 1000Peak. 1 Power 500bd could push 1 RFD2212 (2ohm total load) easily based on the RMS rating of the sub, and 1 Power 1000bd could push 2 RFD2112's (2ohm total load) easily based on the RMS rating of the subs.

I can afford another 500bd quicker than a 1000bd (about $500 difference), but I'd be running at 1ohm in the meantime if I went that route.

I value everyone's opinion, and trust your judgements. I need some opinions!

-------------
Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com



Replies:

Posted By: speedwayaudio1
Date Posted: April 18, 2003 at 1:19 AM
go for the 1 ohms set up! if it won't take it it will shut down on its own. your probly a rf fan but there are other amps out there with more power at less $$$$ shop around. unless your stuck on rf

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Big Dave




Posted By: wvsquirrel
Date Posted: April 18, 2003 at 1:30 AM
I'm a victim of my own demise, RF is the only way I want to go right now. I run other brands for my components and other amps, but I like having RF behind the subs.

Will the amp shut down, as in go into some kind of protect mode and still be operable with the proper ohm level? Or will it fry like bacon?

-------------
Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com




Posted By: Cletis
Date Posted: April 18, 2003 at 2:56 AM
I'm a big RF fan when it comes to sub amps.  I used to run a Punch 500 at 1 ohm mono, the amp is only stable at 4 ohms mono.  If I was pushing it to the max every once in a while it would cut out for a few minutes as a protection circuit, but I still use that amp to the day.  I had it setup like for about a year, so I wouldn't worry about damaging your amp, but if you push to much current through it should just shut off for a bit.  The 500 I was using is an older model, so I can't guarentee how yours wil handle it.




Posted By: wvsquirrel
Date Posted: April 18, 2003 at 9:42 PM
Thanks for the input. I bit the bullet this morning, begged, borrowed, and maxed out the credit card. With trading in the 500bd, I was able to get 2 RFD2112 HX2's and a Power 1000bd for $1200! I gotta love my authorized RF dealer posted_image

OMFG!!!

Thx again for the help everyone

-------------
Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com




Posted By: speedwayaudio1
Date Posted: April 19, 2003 at 12:59 AM
you paid too much for that stuff. rf is a fine brand,  you might have found somthing on e-bay or others sites for a lot less maybe the same amp and subs. i am a dealer not a rf dealer i can't tell people enought to shop shop and shop around. I don't down any manufacturer they all fit there market.  Now if you are stuck on rf i think thats cool if you got the money , butt don't go broke on 1 amp and 2 subs. shop till you drop. do your home work. the extra leg work is worth it.

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Big Dave




Posted By: QuinnX1
Date Posted: April 19, 2003 at 12:39 PM
What are you doing? You gave them a amp that is about 170.00 less than the new one you bought and you still turned around and payed about 250.00 to much not including the amp you gave them. I would go back to the shop and get my money back. Trust me I have done it before! I know you like RF, but the BD1000 is nothing special. I don't mind the BD1500. Look at it this way. 2 Kicker L5 and a BD1500 at that price would make youposted_image, and that would've been a deal.




Posted By: Blazermedic
Date Posted: April 20, 2003 at 7:35 PM
While I don't generally recommend buying anything off Ebay, I do know a few places where you can buy the stuff you bought for a crapload less. Most of the places are authorized by RF, so RF's warranties would still apply. I do think that you paid a little too much. If the shop is professional and value the customers, they'll let you take it back.

CTW
MECP Sales




Posted By: Blazermedic
Date Posted: April 20, 2003 at 7:41 PM
While I don't generally recommend buying anything off Ebay, I do know a few places where you can buy the stuff you bought for a crapload less. Most of the places are authorized by RF, so RF's warranties would still apply. I do think that you paid a little too much. If the shop is professional and value the customers, they'll let you take it back.
     One of my favorite spots online can get you the same stuff for 1,000 shipped, or the 1500 with 2 HE2's shipped for 700. email me if you'd like to know the website. blazermedic@mchsi.com

CTW
MECP Sales




Posted By: tdsteele
Date Posted: April 20, 2003 at 7:57 PM
Well, i dont know how much that model of subs run but a local dealer where im from sells the 1000bd for about $750 and the 500bd for $500. So the 1200 does seem high to me but we all know loaction location location makes a big difference. Yeah you can get them cheaper off the net but personally i would rather pay more for it from a local dealer cause if anything happened to it its going to be alot easier to deal with the local dealer than some other place that you would have to send the product to them and be without til the problem is solved. Personally i use Diamond Audio equipment which i bought from a local dealer, 3 yr warranty, and if anything goes wrong all i have to do is go back to them, let them take out the bad and put in the new, done deal and no fuss. I think thats worth the extra money.  Plus one other note, i know i'm way behind on audio equipment these days but i was always used to one main rule, you get what you pay for and back in the day a GOOD amp would be $1/1 watt. So used to be a power 1000 would run you a $1000. Does that rule not seem to apply anymore or what?!?! I know it applied for my Diamonds, actually paid more than a dollar per watt, but maybe im just stupid that way.




Posted By: QuinnX1
Date Posted: April 20, 2003 at 9:30 PM
Yea the $1.00 per watt. days are over. With forums like this and online sales why pay $1.00 per watt.? As far as the authorized dealer talk, most companies will simply repair any of their equipment that has a receipt, doesn't have to be bought from an authorized dealer. Not to mention there are authorized dealers online too. Many use this forum!




Posted By: m_berrow
Date Posted: April 21, 2003 at 8:19 PM

For $1200 i can buy (2) kicker 12" L7's and (2) zx 1000.1 mono amps. Dude take your stuff back and send me an email @ m_berrow@yahoo.com and i will give you a hell of a quote for what your askin for. Definately less than a grand. 





Posted By: wvsquirrel
Date Posted: April 22, 2003 at 12:38 AM
Seems to be some confusion. I paid $1200 total, not just for the amp. $500 for the HX2's and $700 for the 1000bd. I know it was still a little high, but the necessity of gettign it and installing it before the wife (well, possibly future x-wife) came home out weighed the cost. Besides, the less money I have, the less she can take if things go south posted_image

-------------
Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com




Posted By: wvsquirrel
Date Posted: April 22, 2003 at 1:01 AM
Can't edit right now, so new post ensues!...
Full retail down here on 1 RFD2112 is around $360 (w/o tax), and on the 1000bd is around $850 (w/o tax). I live in central Florida, and prices seem to be higher down here for whatever reason, and 6% sales tax. So all in all, $1200 (with tax) is still better then $1570 (without tax)($1675 with tax). It wasn't much of a break, but it was still better than full retail. Thx for everyone's input, I appreciate the help and contact info for future upgrades posted_image

-------------
Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com





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