1 ohm vs 2 ohm

Here's my current setup:

• RF 400a4 running ADS 336is.2
• RF 800a2 running 2 RF T112D4

The 800a2 is running 400 Watts @ 2 ohm per channel to the subs. The subs just pull way more than the amp can handle...plus it gets hot enough it could brand you if you sat on it. I was thinking about going to an Audiobahn A1300hct in order to give the subs the 1200 watts they need.

My question: Would it be better (SQ wise and reliability wise) to run 2 600 watt amps @ 2 ohms or one amp that could do the 600 in stereo @ 2 ohms? Also...I understand not eveyone here is a fan of Audiobahn...what other amps would be suggested at the same price range?

Thanks.

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The Flakman
I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

Please don't go Audiobahn if your looking for quality...plus I doubt that amp will really push 1200 watts.

Whats your budget for an amp??

What enclosure is your subs in???

What you have here is a darn good class AB amp that is doing all that it can. 99% of these amps (the 800a2) produced in excess of 1000w rms into a 4 ohm mono load. This is how you should have your amp operating ideally but 2 ohm stereo is just fine as well.

Audioburn, just say no, walk away, no glance backs to see if it is following you either. If you give it a chance it will hound you worse than a tire biter ever could. There are just far better amplifiers available on the market today. Want a big amp that has some real balls, find a Eclipse DA7232 or a MTX 81001 for example. You have lots of options depending on your budget. It looks like a fine system you have, don't desicrate it with inferior chrome plated turds. (with flames).

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Top Secret, I can tell you but then my wife will kill me.

I'm looking at somewhere in the $500-$550 range. I'm currently running the subs in a sealed 2.6cu" partitioned box. They pound pretty hard (even in the benz 300e with the gas tank in the way). I am thinking about redoing the box for 1.75 cu" each ported. I may wait as the benz is on its last legs and can't afford a trans and A/C fix.

I think I'm going to have to bite the bullet and fork over a few more dollars to get the wattage I need to push these drivers.

What about Diamond Audio and Digital Audio?

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The Flakman
I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

Dude, change the box first, your subs are going to come alive. Rewire them at the same time to this method. Then and only then look at a different amp.

Option 2 (series/parallel) = 4 ohm load Voice coils wired in series, speakers wired in parallel Recommended Amplifier: Stable at 4, 2, or 1 ohm mono

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Top Secret, I can tell you but then my wife will kill me.

In rewiring them to 4 ohms, I'll be pushing 200 W each to the subs. Would the lower wattage negate the affects of the ported box? Or is that for when I look for a 4 ohm 1200W amp (or 2 600W)?

I definitely want to build the ported box. I saw the plans that RF had for the T112D4 that used a 2.75cu' box per driver with a 3"x15.25"x29.5" port. The only description was that it is LOUD. That would be fun to build just for the hell of it. The box would never be able to reside anywhere but the garage though.

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The Flakman
I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

Rewiring to the method I listed above means that you are now bridging your amp for it's maximum output. Again as I mentioned, this amp when bridged into a mono 4 ohm load produced in excess of 1000w rms in 99% of the amplifiers that Rockford made. This means for ease of math here, 500w rms into each sub and 250w rms into each voice coil.

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Top Secret, I can tell you but then my wife will kill me.

forbidden wrote:

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Want a big amp that has some real balls, find a Eclipse DA7232 or a MTX 81001 for example.

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Or the mono version, (I think it's the DA7121)... 2kW into 2 ohms... Should do PLENTY, and it'll be close to your desired price range, maybe a little bit more.

forbidden wrote:

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inferior chrome plated turds. (with flames).

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Funny... still laughing to myself. ;)

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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."

forbidden wrote:

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Rewiring to the method I listed above means that you are now bridging your amp for it's maximum output. Again as I mentioned, this amp when bridged into a mono 4 ohm load produced in excess of 1000w rms in 99% of the amplifiers that Rockford made. This means for ease of math here, 500w rms into each sub and 250w rms into each voice coil.

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Thanks! That helps a bunch. The info is greatly appreciated. Always more to learn!

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The Flakman
I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

Quick question: how much money does the DA7232 typically run for? Can't find it anywhere on the net.

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The Flakman
I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

The DA7122 is only stable to 2 ohm in mono and is a single channel type of amp. The DA7232 is a dual mono dual 2 ohm stable amp making it the far better choice. As I am in Canada, my pricing is going to be different that I what you can find it for in the US. If you would like I can line you up with a authorized dealer in the US that can get this amp for you. Send me a PM for further info should you like.

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Top Secret, I can tell you but then my wife will kill me.

forbidden: Tried to PM you but you've exceeded your limit. I would definitely value your suggestions on dealers as you are in the business. I had a dealer that supplied all of my equipment for the past 20 years or so. But she sold the business. Now it's more of an import tuner accessory shop instead of a stereo shop. Let me know the best way you would like to get in contact (or when your PM has some room left). Popular guy LOL!

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The Flakman
I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

PM box has some room in it now, please give me your e-mail address there and I will forward it to a authorized US dealer.

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Top Secret, I can tell you but then my wife will kill me.

Or, if Rob gets busy, (I got your back, man...) Dial 1-800-55-ECLIPSE (800-553-2547), and it'll connect you RIGHT to your closest Eclipse Dealer! Pretty sweet, really...

Oh, and John, drop by Bakersfield, and I'll show ya what that DA7232 is capable of! I have it running a single Eclipse Ti12, and it's pretty ballsy!

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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."

haemphyst wrote:

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Or, if Rob gets busy, (I got your back, man...) Dial 1-800-55-ECLIPSE (800-553-2547), and it'll connect you RIGHT to your closest Eclipse Dealer! Pretty sweet, really...

Oh, and John, drop by Bakersfield, and I'll show ya what that DA7232 is capable of! I have it running a single Eclipse Ti12, and it's pretty ballsy!

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Thanks haemphyst (still trying to figure that nick out LOL). I've been reading up on the Eclipse stuff...never really thought about them before. $1200 bones is a grip of change though. Still would love to hear it. I don't doubt its abilities. If I get down in your hood...I'll definitely look you up! I'm gonna redo my box and wiring first. We'll see what that does.

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The Flakman
I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

If Rob gets busy....it is 1:00am and I am still at work.

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Top Secret, I can tell you but then my wife will kill me.

forbidden, oh the joys of owning your own business =)

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The Flakman
I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

Flakman wrote:

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haemphyst wrote:

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Or, if Rob gets busy, (I got your back, man...) Dial 1-800-55-ECLIPSE (800-553-2547), and it'll connect you RIGHT to your closest Eclipse Dealer! Pretty sweet, really...

Oh, and John, drop by Bakersfield, and I'll show ya what that DA7232 is capable of! I have it running a single Eclipse Ti12, and it's pretty ballsy!

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Thanks haemphyst (still trying to figure that nick out LOL). I've been reading up on the Eclipse stuff...never really thought about them before. $1200 bones is a grip of change though. Still would love to hear it. I don't doubt its abilities. If I get down in your hood...I'll definitely look you up! I'm gonna redo my box and wiring first. We'll see what that does.

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I'll try to make it a quick description... DYohn and dwarren know the story.

I am strong... sometimes stronger than I realize, and one time I was working on a table saw in a friends garage, and I locked the rear ripfence lock down, and he was unable to loosen it without a tool. While he was loosening it, he mumbled something under his breath about "Freakin' ham-fist, something or other..." So ham-fist was my name...

I play computer games, and another friend of mine simply took that ham-fist nickname, and bave it an "Olde-English" spelling twist to it, because I like to commandeer tanks to kill foot troops in BF1924 and BFII... and it just stuck.

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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."

ROFL. Ham fist. I like it! Trying not to wake the g-f while she's sleeping!

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The Flakman
I feel strange. I have deja vu and amnesia at the same time.

John | Manteca, CA

Flakman, actually, while I am thinking of it, call George Carosella at Trans-Lex in Bakersfield. He's the local Eclipse Dealer, and his number is 661-327-5375. Tell him Dave referred you...

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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."

if u want a good amp for less, try a Boss 850 watt mono amp.  i have one running my 2, 12in. MTX thunder 4000, and it sounds great.  the boss is under 100 dollers were i got it.  so it might help out with your problem.

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schrummy