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Going with 4ohm subs I guess 4 pairs of 2 wiried in series to give to 4 sets with a 8ohm net load. Then wire the 4 pairs into 2 groups "4 in each" parelleled to get you a 4ohm net load. Then bridge the 2 groups to give you a 2ohm mono load. Waaalaaaa
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That's how I'd do it, or you could also wire them to be in 1 Ohm stereo. I think I added Ohmage correctly, better with languages than numbers, please correct if I'm wrong.
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Do you guys think a 1100a2 is a smart choice for a sub amp? If not,why not? I know this amp is not class d but I have the current to run it. Also any suggestions for any other amp in the $650 price range.
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Posts: 49 | From: st. augustine fl USA | Registered: Jul 1999
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I was looking at the specsheet on the 1100a2. It says 1100 x 1 bridged /mono at 4 ohms. Is it okay to run it at bridged/mono at 2 ohms? How much output?
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Posts: 49 | From: st. augustine fl USA | Registered: Jul 1999
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Yes Yes Yes Yes and umm Yes. the 1100a2 should run at 2ohm mono fine with a output at around 1500-1600watts i beleive "Lota fucken power for a class A/B amp"
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do you all think that the rfz's will handle the 1100a2? I will try and be careful with the go fast knob! I don't intend to compete with this but I want to be the baddest MO-FO in town!!!
------------------ RFinFL@aol.com
Posts: 49 | From: st. augustine fl USA | Registered: Jul 1999
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Think about geting two smaller amps like 800aII. I have learned on this page and am quite suprize no one has said this yet but sieries wiring is BAD BAD BAD. With two amp you can do like I did with my 8 10"s. and the two 500aII I have using a 2 ohm stereo load on all four chanles. With that you still will be getting 200+++ watts pre woofer. With the 1100aII you will get maybe 110 watts pre woofer. Even if you wher to get 2 500aII you can get 125+ watts pre woofer. My 500aII's run 8 Vega Vega 10" subs.
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I know dukk and techman have goten into this befor. How about it guys a little help here. I looked for some of them theads from the past but can't seem to find them. For what I recall it cas to do with the damping factor of the amp.
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I am not real familiar with the 1100a2 however Dukk has said to expect 2K at 2 Ohm mono. And that 1500W would be at 4 Ohm mono. This is provided that you have the power to feed the amp. I will be getting one in about a week to do some testing before it hits my daily driver.
About the series wiring, as I have said before on the old forum. It all has to do with the EMF caused by wiring in series. There is slight and unavoidable differences between speakers due to manufacturing tollerences this leads to slight differences in the mechanical behavior of the two speakers in series. These differences in movement result in induced voltage (called back EMF). This effect causes a problem when two speakers which behave differently are connected in series because the speakers can modulate each other, resulting in distortion. The problem becomes more serious as more speakers are connected in series. You can avoid this by buying subs that will wire up in parallel. When you wire in parallel all the speakers are shorted dirrectley to the amp. Eliminating the interactions between them. You can wire the coils of DVC subs in series do to the fact that they are on the same mechanical structure.
This is a simple explaination it can get more indepth. Also the tollerences of cheap speakers are far less than higher end speakers meaning that the EMF in there connection will be even worse.
------------------ ******************* Founder: Street Sounds Car Audio Club ******************* If It Don't Read 150+ it Ain't Loud......
Posts: 289 | From: Howell, MI | Registered: May 1999
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I would have to say in most cases you are right. But I have measured considerable increases to as much as 4% over the distortion of a parallel conection of the same pair of subs driven at moderate to loud volumes. With just a single series conection. And that was a pair of JL W4 subs!!! Once you get over 6% most subs become very non linear. And their sound quality deteriorates very rapidley. Why would you want to add to the distortion the subs already have which is relatively high. If you use cheap subs. I am not going to mention any names, however I think you all know some cheap subs that are on the market. They get even worse. If you are running a pair of subs in series in a small system for spl and not competing SQ then don't worry.
And parallel is also better for SPL because if you blow a coil lead or other falure. The other subs keep playing. I really can't think of a good reson to wire series....
------------------ ******************* Founder: Street Sounds Car Audio Club ******************* If It Don't Read 150+ it Ain't Loud......
Posts: 289 | From: Howell, MI | Registered: May 1999
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