? about ohm loads

Well...you have only one option...and that is to wire each sub to a channel. for a 4 ohm load so each sub is getting only 250 watts. Your can series them and run the amp 8 ohms bridged but the output will be the same

Simply mismatching equipment and not doing your research...sorry.

The ZXI 1006 is a 2 channel amp so I dunno how you are saying it has only 1 set of speaker terminals.

 

Edited...computer messed up

 

Have you not bought this amp yet or have you???

Either way you could get any of the hifonics class D amp...this amp would work nicely

http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=15722

puts out 1000 watts rms at 2 ohms...but may I ask what is your budget???

 

no problem...still whats your budget??

 

whenever bridging a 2 channel amp, your amp will "see" half the impedance of the subs rating...4 ohm sub will be a 2 ohm load on the amp in mono.....1 ohm sub on the amp will be .5 (half an ohm) to the amp...etc........who wants a turkey on rye?

 

you have 2 woofers that are 4 ohm each, you want to connect the positves and negatives in parallel, which will make a 2 ohm load, so you need an amp that will be capable of driving a 1 ohm load...........

 

yes, the speakers impedance (ohms) will ALWAYS stay the same (in theory, thats another topic)

In stereo mode, each channel sees the impedance of your speakers as stated, but when bridgd in mono, the amp see's half the impedance............

 

Um...the rated nominal impedance will always stay the same...but impedance changes with frequency.

Even though your sub is rated at 4 ohms...that is 4 ohms nominal...meaning that is the lowest load the sub will show...at a certain frequency the sub can show a 30 ohm load...enclosure also affects impedance but that is also another story

 

so, it will NEVER fall below its nominal imedance you say? care to make this a freindly arguement??? maybe put a little cash on the table???

 

Never said never

But you know what I mean Viking...shut up you old bastard lol...isn't it past your bedtime haha

 

Very interesting.....

All these years of talkin car audio, I never read or heard that bridging the amp makes it see half of the actual nominal impedence...Not saying that is wrong...Just never heard that...

I know that typically in stereo mode with a two ohm load, most amps can handle that, but bridging the amp doubles (correct??) the voltage output and thus greatly increases current flow (heat) out of the output transistor due to ohms law.....Amps not designed to handle the current (heat) will overheat and possibly burn up...

Technically talkin Viking....Can you explain this...half the impedence being seen (not questioning you at all.....Just curious and I would like to be able to explain it to someone if they ask me)

I always thought nominal impedence was what the speaker was typically at rest...Different frequencies and temps could make it go above and/or below that...(different enclosure will make the driver mechanically move different and can affect this too..(I think))

Willy

 

I will try my best......

Essentially, a stereo 2 channel amp has 2 sets of outputs, one for the right cahnnel, and a set for the left....... each channel either is positive in nature, or negative, meaning one channel is out of phase with the other, but its really in phase cause they wire the amp internally to be that way....follow? Now, when a load (speaker) is put on one of the channels, its sees that load as rated, say 4 ohm....Now, lets bridge the amp......

You are essentally ruuning a speaker (s) on the positive output of one channel, and the negative outpurt of the other channel......remember, they are out of phase!!!! this way one half of the amp pushes the speaker, the other half pulls the speaker..... with this being the case each channel is no longer referenced to "ground", so therefore, the amp see's half the impedance....or it is shared between the 2 channels....

Crap, did that even make sense??????????? I am terrrible at explaing things like this at times!!!! Wish i knew of a site that could explain it better, or even a schematic....


Oh, and the nominal impedance of a driver is pretty much as you descibe it, you have a pretty good understanding of that it appears....

 

so lets say a 2ch amp rated at 100x2 at 4ohms and 150x2 at 2 ohms will basicly be 300x1 at 4ohms.

so each channel sees its 2 ohm rating. being 150 from each ch.thus 1/2 the impedance.

is that right.?

 

yep, you got it