Take a look at headunit amplifier specs, then take a look at the statement above....Care to revise it?

Specs are rarely accurate IMO. Some you trust others you don't (i.e. that legacy "2000W" amp).

 

I think what you wanted to say was to get a dual 4 ohm coil sub and run the coils in parallel (not the channels on the amp...if it's a 5th channel, there's no channels - plural - to run in parallel).

Also, the amp doesn't care what cofiguration the sub is or how many subs there are - the only thing it sees is a resistance, and adapts accordingly.

 

What I meant to say was the terminals on the speaker in parallel. Most amps have a thermal protection circuit that will shut the amp off if a low impedence load is presented. You are increasing current and therefore increasing heat. Most five channel amps cannot take a DVC sub on the fifth channel since the channel usually shares internal components with at least two of the other channels.

Additionally speaker manufacturers lie all the time. There is no regulation to what they can publish. Do you really believe that the average radio made by Sony is 52 x 4. They are trying to put the biggest and best numbers that they can on the box.

On paper the Pioneer speakers far exceed the capabilities of the type r, but your ears tell you differently. I think the type r alpines are so so, but they are better than pioneers. Tough to justify for the $$$.

 

As long as you wire it within the specified range according to the manufacturer shouldn't it be ok?

 

Just an FYI, an amp doesn't perceive any difference between a DVC or an SVC sub - so long as the final load that is presented is the same.

 

Whatever I'm supposed to see, I'm not seeing it. Are you going after the 14V, where manufacturers put 14.4 V, but 11 - 16V is allowable?

Or is it the fact that the Maximum Power output is achieved at the maximum voltage?

 

The point is that there is not one headunit on the market that acutally puts out it's rated power. The only way that those heads will meet it's rated power is if it gets hit by lightning.

For example...an alpine head claims 60W x 4. There's no way in hell that that amp in that head puts out anything near that kind of power unless the mfg. totally twists the testing procedure.

Have you ever looked at those computer speakers out there that cost $16, yet they claim 400W or something like that? Same thing....

That's what I meant....manufacturers are very tricky now-a-days. The naming of most amplifiers are also quite deceiving. It's all a marketing thing.

 

this thread seems to be a good one i am enjoying it.
its amazing to see all the mis-information out there
basically i agree with curley 55 deck power sucks some are better than others but if you want to here all the music the way it was intended get a good amp with good speakers(speaker opinions as we see are at the least varied lol)
some things i look for in an amp
the manufacturer ie: quality control, warranty, yrs in bussiness
what imput voltage the are basing the output in RMS
THD less than 0.5% at rated power @ 2ohms. BE SURE ITS FROM 20-20K HZ anyting less is B.S.
damping > 100 db
ihf dynamic headroom +3db or better most mfg. dont disclose this
signal to noise >100db
separation >90db
build quality/ what country of origin
these are the basics for me. there is more to look at, like if it has crossovers, bass control, etc.

 

First I "defy the laws of physics" and now you agree with me.....

Country of origin has little to do with inherent quality. The design is more important then where the machine putting parts on a board is located at. So long as the specs/tolerances of a product are well defined....it can be built almost anywhere with today's global economy and no one would be the wiser...

 

The amp sees a 2 ohm load for example and adjusts its current intake from the battery. If the amp is not 2 ohm stable it will shut off. Yes if the load is the same it will not matter. DVC 4 ohm coils in parallel do not have the same resistance as a single 4 ohm. If the amp is not rated to go to 2 ohms it will shut down or damage the amp. The amp will try to run any load, but there are protections built into the amp to shut it down. The whole point of a DVC sub is to give you options other than 4 ohms, so why would you run a DVC at four ohms?